Refrigerant preparation rack

Abstract

The utility model provides a refrigerant preparation rack, which relates to the technical field of transmission electron microscopes and comprises a functional box and a control box arranged on the lower side of the functional box, and a partition plate in the middle of the functional box divides the functional box into a mixing area and a freezing area; the mixing area is provided with an observation window, and a first inlet pipe, a second inlet pipe and a mixing cavity are arranged in the mixing area; a liquefying cavity is formed in the freezing area; a display screen is arranged on the side face of the control box, a high-voltage area is arranged on one side of the display screen and provided with indicator lamps, and a low-voltage area is arranged on the side, away from the high-voltage area, of the display screen and provided with control buttons. The device is simple in structure, ethane and propane gas are mixed in the mixing area on the front side of the function box to obtain ethane-propane mixed gas, the ethane-propane mixed gas is liquefied in the freezing area on the rear side of the function box, the control box below the function box can monitor and control mixing and liquefying operation, the control box is divided into high pressure and low pressure, and the control box is convenient to use. The safety is high, and the refrigerant is efficiently and stably prepared.

Description

TECHNICAL FIELD

[0001] The utility model relates to transmission electron microscope technical field especially, the utility model relates to a refrigerant preparation frame. BACKGROUND

[0002] For the cryo transmission electron microscope, sample preparation is not only the first step but also a crucial step. The rapid freezing sample preparation technology needed for sample preparation is simply a process of spreading the sample in solution state on the copper mesh to form a very thin sample liquid layer, and then putting the copper mesh into the liquid refrigerant for rapid freezing. The refrigerant is usually obtained by liquefying ethane or propane in a low-temperature container. With the help of the extremely high heat conduction rate of the refrigerant, a cooling rate greater than 10 4 K / s can be achieved, thereby ensuring that the water in the sample immersed in the refrigerant is converted into amorphous ice. When ice crystals are formed in the sample, the original structure of the sample will be destroyed and the electron diffraction caused by the ice crystals will interfere with data collection.

[0003] The commonly used refrigerant is liquefied ethane, and its temperature can only reach 90K. A mixing and liquefaction system of ethane and propane gas needs to be developed to obtain a refrigerant that can maintain a liquid state at 77K.

[0004] Nowadays, if a mixing and liquefaction system of ethane and propane gas is to be prepared, a relatively large preparation system structure is needed, which often requires multiple devices such as gas introduction equipment, gas cleaning equipment, gas mixing equipment, and mixed gas liquefaction equipment. These multiple devices are often separately arranged and interconnected through pipelines, which not only occupies a large area and requires a larger preparation platform to be built, but also has a huge construction cost. In addition, the separate arrangement of multiple devices is not convenient for unified management, and the signals between multiple devices cannot be communicated, which makes it impossible to repeatedly mix and liquefy ethane and propane gas. Moreover, the mixing and freezing of gas are obtained through experience and cannot be monitored in real time, resulting in large error in the mixing ratio of the obtained mixed gas and poor refrigerant preparation effect.

[0005] Therefore, it is necessary for us to design a reasonable and efficient refrigerant preparation frame to solve the above problems. INVENTION CONTENTS

[0006] The utility model discloses a refrigerant preparation frame, simple structure, small area, good integration, the mixed area of the function box front side mixes ethane and propane gas to obtain ethane-propane mixed gas, and the refrigeration area of the function box rear side liquefies ethane-propane mixed gas, and the control box at the function box below can monitor and control mixing and liquefaction operation, and the control box high pressure partition is safe, and the installation cost is low, and the refrigerant preparation is efficient and stable.

[0007] To achieve the above object, the utility model discloses the following technical scheme is realized:

[0008] A refrigerant preparation frame, including function box and the control box of setting in the lower side of function box, the partition of function box middle part divides function box into mixing area and refrigeration area, be provided with first inlet pipe, second inlet pipe and mixing chamber in mixing area, be provided with liquefied chamber for communicating with mixing chamber in refrigeration area, the side of display screen is provided with high voltage area in control box, the high voltage area is provided with warning light, the side of display screen away from high voltage area is provided with low voltage area, and low voltage area is provided with control button.

[0009] As the preferred of the utility model, the mixing area is provided with an observation window away from the refrigeration area, and the side of the mixing area is provided with a ventilation opening; the refrigeration area is provided with a sealing structure.

[0010] As the preferred of the utility model, the function box is provided with an output pipe, the first inlet pipe, the second inlet pipe and the output pipe are communicated with the mixing chamber; the liquefied chamber is communicated with the end of the output pipe away from the mixing chamber; the perforation is arranged on the partition plate for facilitating the output pipe to pass through.

[0011] As the preferred of the utility model, the observation window is provided with an observation glass.

[0012] As the preferred of the utility model, the lower side of the control box is provided with a support frame, and the support frame is an insulating member.

[0013] As the preferred of the utility model, the number of the warning light and the control button is at least one.

[0014] As the preferred of the utility model, the control box is provided with a controller; the display screen, the warning light and the control button are electrically connected with the controller.

[0015] As the preferred of the utility model, the first inlet pipe is provided with a first flow sensor, the side of the first flow sensor close to the mixing chamber is provided with a first one-way valve, and the side of the first flow sensor away from the mixing chamber is provided with a first diaphragm valve; the second inlet pipe is provided with a second flow sensor, the side of the second flow sensor close to the mixing chamber is provided with a second one-way valve, and the side of the second flow sensor away from the mixing chamber is provided with a second diaphragm valve; the output pipe is provided with a barometer and a third one-way valve.

[0016] As the preferred of the utility model, the liquefied chamber is provided with a refrigeration chamber outside.

[0017] As the preferred of the utility model, the mixing chamber is communicated with a waste pipe.

[0018] The refrigerant preparation frame has the advantages of simple structure, small occupied area, good integration, mixing of ethane and propane gas to obtain ethane-propane mixed gas in the mixing area on the front side of the function box, liquefaction of the ethane-propane mixed gas in the refrigeration area on the rear side of the function box, monitoring and control of the mixing and liquefaction operation at the control box below the function box, high safety, low installation cost and high efficiency and stability of refrigerant preparation. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 It is a perspective structural schematic view of an embodiment of the refrigerant preparation frame of the utility model;

[0020] Fig. 2 It is a front view structural schematic view of an embodiment (the function box shell is transparent) of the refrigerant preparation frame of the utility model;

[0021] Fig. 3 It is a top view structural schematic view of the function box of an embodiment of the refrigerant preparation frame of the utility model;

[0022] Fig. 4 It is a front view structural schematic view of the partition plate of an embodiment of the refrigerant preparation frame of the utility model;

[0023] In the drawing: 1, first inlet pipe, 11, first inlet interface, 12, first filter, 13, first diaphragm valve, 14, first pressure reducing valve, 15, first flow sensor, 16, first gas quality controller, 17, first check valve, 2, second inlet pipe, 21, second inlet interface, 22, second filter, 23, second diaphragm valve, 24, second pressure reducing valve, 25, second flow sensor, 26, second gas quality controller, 27, second check valve, 3, mixing cavity, 4, output pipe, 41, air pressure gauge, 42, third diaphragm valve, 43, third check valve, 44, output interface, 45, outlet pipe, 5, liquefaction cavity, 51, refrigeration cavity, 6, waste pipe, 61, fourth diaphragm valve, 62, fourth check valve, 63, waste interface, 7, partition plate, 71, shockproof layer, 72, heat insulation layer, 8, function box, 81, observation window, 82, ventilation opening, 9, control box, 91, display screen, 92, high pressure area, 921, warning light, 93, low pressure area, 931, control button, 94, support frame, 95, controller. DETAILED DESCRIPTION

[0024] The following is a specific embodiment of the utility model, which further describes the technical scheme of the utility model, but the utility model is not limited to these embodiments.

[0025] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of the modules and steps described in these embodiments do not limit the scope of the present invention.

[0026] At the same time, it should be understood that for the convenience of description, the processes in the drawings are not just performed separately, but multiple steps are performed in an intersecting manner.

[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the product of this utility model is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and the like are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0029] Technologies, methods, and systems known to ordinary technicians in the relevant field may not be discussed in detail, but where appropriate, the technologies, methods, and systems should be considered part of the authorization specification.

[0030] Example 1: Figs. 1 to 4 The figure shown is only one of the embodiments of the present invention, a refrigerant preparation rack, comprising a function box 8 and a control box 9 arranged at the lower side of the function box 8, a partition plate 7 in the middle of the function box 8 divides the function box 8 into a mixing area and a freezing area; a first inlet pipe 1, a second inlet pipe 2 and a mixing chamber 3 are provided in the mixing area; a liquefaction chamber 5 for communicating with the mixing chamber 3 is provided in the freezing area; a display screen 91 is provided on the side of the control box 9, a high-pressure area 92 is provided on one side of the display screen 91, a warning light 921 is provided on the high-pressure area 92, a low-pressure area 93 is provided on the side of the display screen 91 away from the high-pressure area 92, and a control button 931 is provided in the low-pressure area 93.

[0031] In the present invention, the functional box 8 is a box for mixing and liquefying gases; and the control box 9 is arranged at the lower side of the functional box 8 and plays a role in monitoring and regulating the mixing and liquefaction of gases in the functional box 8 .

[0032] First, the structure of the function box 8; the function box 8 is provided with a vertical partition plate 7 in the middle, the width of the partition plate 7 is equal to the width of the function box 8, so that the partition plate 7 divides the function box 8 into two areas of mixing area and freezing area arranged in front and back, and the mixing cavity in the front side of the function box 8 is provided with a first inlet pipe 1, a second inlet pipe 2 and a mixing cavity 3; the freezing area in the rear side of the function box 8 is provided with a liquefaction cavity 5.

[0033] Here, the function box 8 is provided with an output pipe 4, the first inlet pipe 1, the second inlet pipe 2 and the output pipe 4 are all communicated with the mixing cavity 3; the liquefaction cavity 5 is communicated with the end of the output pipe 4 away from the mixing cavity 3; the partition plate 7 is provided with a perforation for facilitating the output pipe 4 to pass through; the ethane gas enters the mixing cavity 3 from the first inlet pipe 1, the propane gas enters the mixing cavity 3 from the second inlet pipe 2, and the ethane gas and the propane gas enter the mixing cavity at the same time, and the ethane gas and the propane gas are fully mixed after reaching the mixing cavity 3, and the obtained ethane-propane mixed gas is finally output from the output pipe 4 to the liquefaction cavity 5 and is liquefied to form a refrigerant in the liquefaction cavity 5.

[0034] In this way, the ethane and propane gas are mixed in the mixing area in the front side of the function box to obtain the ethane-propane mixed gas, and the ethane-propane mixed gas is liquefied in the freezing area in the rear side of the function box, the mixing and liquefaction of the gas are executed in different areas, the interference is small, and the refrigerant preparation is stable and efficient.

[0035] Then, the control box 9 is provided with a display screen 91 on the side, the display screen 91 is provided with a high-voltage area 92 on one side, the high-voltage area 92 is provided with a warning light 921, the display screen 91 is provided with a low-voltage area 93 away from the high-voltage area 92, and the low-voltage area 93 is provided with a control button 931.

[0036] In fact, the control box 9 is provided with a controller 95, which can obtain gas mixing data and gas liquefaction data in the function box 8 and can control gas mixing and liquefaction.

[0037] In the utility model, the controller 95 is connected to the mains 220V alternating current, so that the main control circuit of the controller 95 is a high-voltage part (the default is higher than 36V safety voltage, that is, high voltage), and the high-voltage area is integrated on one side of the display screen 91, which can monitor the circuit of the controller; the controller 95 also has an inverter circuit and a voltage reduction circuit, and this part of the circuit is a low-voltage part (generally 12V or 24V direct current, low voltage), and the low-voltage area is integrated on the other side of the display screen 91, which can send control signals to the main circuit of the controller through the inverter signal.

[0038] Specifically, the display screen 91, the warning light 921 and the control button 931 are electrically connected with the controller 95.

[0039] In operation, the controller 95 acquires data and displays it on the display screen 91, and simultaneously analyzes the gas mixing data and the gas liquefaction data. Once the data is abnormal, the warning light 921 in the high-pressure area 92 is lit red to warn the operator. The operator then adjusts and controls the gas mixing and liquefaction in the function box 8 through the warning light 921 and the data on the display screen 91, and the control button 931 in the low-pressure area 93.

[0040] Here, the control box below the function box can monitor and control the mixing and liquefaction operation, and the control box has high-pressure and low-pressure areas, high operation safety, good detection and control effect, and better refrigerant preparation effect.

[0041] Embodiment Two, still as shown in Figs. 1 to 4 Embodiment Two, still as shown in

[0042] In addition, the liquefaction cavity 5 is provided with a temperature sensing element, and the temperature sensing element is also electrically connected to the controller 95.

[0043] Here, the first flow sensor 15 can detect the flow of ethane gas entering the mixing cavity 3 through the first inlet pipe 1, and the second flow sensor 25 can detect the flow of propane gas entering the mixing cavity 3 through the second inlet pipe 2. Similarly, the gas pressure gauge 41 can detect the gas pressure of the ethane-propane mixed gas in the mixing cavity 3. Finally, the temperature sensing element can obtain the temperature of the ethane-propane mixed gas when it is liquefied in the liquefaction cavity 5.

[0044] That is, the controller can acquire the readings of the first flow sensor 15, the second flow sensor 25, the gas pressure gauge 41, and the temperature sensing element, and display them on the display screen 91, so that the staff can check the gas mixing data in the first inlet pipe 1, the second inlet pipe 2, and the output pipe 4, and the temperature in the liquefaction cavity 5.

[0045] Here, our purpose is to obtain the refrigerant for the frozen transmission electron microscope, this refrigerant needs to be 77K ultra-low temperature liquefaction of the ethane-propane mixed gas formed by mixing the specified proportion of ethane gas and propane gas, in order to obtain the refrigerant that maintains liquid state at low temperature, first of all, it is necessary to ensure that the temperature in the liquefaction cavity 5 is 77K, the display screen 91 displays the temperature in the liquefaction cavity 5 obtained by the temperature sensing element in real time, once the temperature sensing element obtains the temperature deviates from 77K, then the display screen 91 displays the real-time temperature, and the warning light 921 also flashes red light.

[0046] In addition to the temperature, the most critical point is how to obtain the specified proportion of ethane-propane mixed gas.

[0047] The first flow sensor 15 is provided with a first one-way valve 17 near one side of the mixing cavity 3, the second flow sensor 25 is provided with a second one-way valve 27 near one side of the mixing cavity 3, and the output pipe 4 is provided with a third one-way valve 43, so that the ethane gas and the propane gas can only flow into the mixing cavity 3 from the first inlet pipe 1 and the second inlet pipe 2 respectively, and the ethane-propane mixed gas can only flow from the mixing cavity 3 to the output pipe 4 and the liquefaction cavity 5, preventing gas backflow; after the ethane gas flow at the first flow sensor 15 in the first inlet pipe 1 reaches the first predetermined value, the first one-way valve 17 is closed; after the propane gas flow at the second flow sensor 25 in the second inlet pipe 2 reaches the second predetermined value, the second one-way valve 27 is closed; similarly, when all the ethane-propane mixed gas in the mixing cavity 3 reaches the liquefaction cavity 5, the third one-way valve 43 is closed.

[0048] The output pipe 4 is provided with a gas pressure gauge 41 near one end of the mixing cavity 3, that is, the gas pressure gauge 41 is located on the side of the third one-way valve 43 close to the mixing cavity 3, and the gas pressure in the mixing cavity 3 can be obtained through the gas pressure gauge 41; before the ethane gas and the propane gas are introduced, the mixing cavity 3 is in a vacuum state, when the gas pressure gauge 41 displays that the mixing cavity 3 is in a vacuum state, the first one-way valve 17 and the second one-way valve 27 are opened respectively, and the ethane gas and the propane gas are introduced into the mixing cavity 3 through the first inlet pipe 1 and the second inlet pipe 2; similarly, after the ethane gas and the propane gas are introduced and fully mixed, according to the readings of the first flow sensor 15 and the second flow sensor 25, the mass of the ethane-propane mixed gas in the mixing cavity 3 can be calculated, and the volume of the mixing cavity 3 is known, so the target pressure in the mixing cavity 3 can be calculated, when the gas pressure gauge 41 displays that the pressure in the mixing cavity 3 is the target pressure, the third one-way valve 43 is opened, and the ethane-propane mixed gas flows from the mixing cavity 3 to the liquefaction cavity 5 through the output pipe 4 for liquefaction.

[0049] The first flow sensor 15 is provided with a first diaphragm valve 13 away from one side of the mixing cavity 3, and once any instrument on the first inlet pipe 1 fails, the first diaphragm valve 13 is closed in an emergency to prevent the ethane gas from passing through; the second flow sensor 25 is provided with a second diaphragm valve 23 away from one side of the mixing cavity 3, and once any instrument on the second inlet pipe 2 fails, the second diaphragm valve 23 is closed in an emergency to prevent the propane gas from passing through.

[0050] Similarly, the barometer 41 and the third one-way valve 43 are provided with a third diaphragm valve 42, and once any instrument on the first inlet pipe 1, the second inlet pipe 2 and the output pipe 4 fails, the third diaphragm valve 42 is closed in an emergency to prevent any gas from passing through to the liquefaction cavity 5.

[0051] Embodiment three, still as Figs. 1 to 4 shown, is only one of the embodiments of the utility model, and on the basis of any of the above embodiments, the utility model provides a refrigerant preparation frame, wherein one end of the output pipe 4 away from the mixing cavity 3 is provided with an output interface 44, and the output interface 44 is connected with the liquefaction cavity 5 through a connecting pipe 45.

[0052] The obtained ethane-propane mixed gas is output from the output pipe 4 to the liquefaction cavity 5 for liquefaction, and the refrigerant can be obtained.

[0053] Moreover, the liquefaction cavity 5 is provided with a refrigeration cavity 51 outside; the refrigeration cavity 51 is filled with liquid nitrogen with a temperature of 77K, and the outer wall of the liquefaction cavity 5 is a heat conducting member, so that the liquefaction cavity 5 is surrounded by the 77K liquid nitrogen environment, so that the ethane-propane mixed gas can be fully liquefied in the 77K ultra-low temperature environment after being introduced into the liquefaction cavity 5, and the refrigerant in a stable liquid state is obtained.

[0054] One end of the first inlet pipe 1 away from the mixing cavity 3 is provided with a first inlet interface 11, one side of the first inlet interface 11 close to the mixing cavity 3 is provided with a first filter 12, and the first flow sensor 15 and the first one-way valve 17 are provided with a first gas quality controller 16; one end of the second inlet pipe 2 away from the mixing cavity 3 is provided with a second inlet interface 21, one side of the second inlet interface 21 close to the mixing cavity 3 is provided with a second filter 22, and the second flow sensor 25 and the second one-way valve 27 are provided with a second gas quality controller 26; the first diaphragm valve 13 and the first flow sensor 15 are provided with a first pressure reducing valve 14; the second diaphragm valve 23 and the second flow sensor 25 are provided with a second pressure reducing valve 24.

[0055] The gas in the filter, the pressure reducing valve reduces the pressure of the inlet end, and the gas quality controller measures the gas purity, so that the gas entering the first inlet pipe 1 and the second inlet pipe 2 is pure and impurity-free, the gas is pure and high-quality, and the gas mixing effect is better.

[0056] In summary, the ethane gas enters the first inlet pipe 1 through the first inlet interface 11, sequentially passes through the first filter 12, the first diaphragm valve 13, the first pressure reducing valve 14, the first flow sensor 15, the first gas quality controller 16 and the first check valve 17, and then enters the mixing cavity 3; similarly, the propane gas enters the second inlet pipe 2 through the second inlet interface 21, sequentially passes through the second filter 22, the second diaphragm valve 23, the second pressure reducing valve 24, the second flow sensor 25, the second gas quality controller 26 and the second check valve 27, and then enters the mixing cavity 3.

[0057] In addition, after the ethane-propane mixed gas in the mixing cavity 3 is uniformly mixed, the ethane-propane mixed gas enters the output pipe 4, sequentially passes through the gas pressure gauge 41, the third diaphragm valve 42 and the third check valve 43, and finally passes through the outlet pipe 45 from the output interface 44 into the liquefaction cavity 5.

[0058] The control box 9 is provided with a control button 931; the first diaphragm valve 13, the second diaphragm valve 23 and the third diaphragm valve 42 are electrically connected with the control button 931 through the controller; in fact, the control button has at least four, including a first shutdown button for electrically connecting with the first diaphragm valve, a second shutdown button for electrically connecting with the second diaphragm valve, a third shutdown button for electrically connecting with the third diaphragm valve, and a fourth shutdown button for electrically connecting with the three diaphragm valves at the same time, in an emergency, a single diaphragm valve can be controlled to be shut down through the first three buttons, or the three diaphragm valves can be directly controlled to be shut down through the last button.

[0059] In addition, after the ethane-propane mixed gas in the mixing cavity 3 is uniformly mixed, the ethane-propane mixed gas enters the output pipe 4, sequentially passes through the gas pressure gauge 41, the third diaphragm valve 42 and the third check valve 43, and finally passes through the outlet pipe 45 from the output interface 44 into the liquefaction cavity 5.

[0060] In the utility model, the mixing cavity 3 is communicated with the exhaust pipe 6; before carrying out gas mixing, the exhaust pipe 6 can be used to exhaust the waste gas in the mixing cavity 3, or the inhomogeneous gas in the mixing cavity 3 can be exhausted when the mixed gas is just introduced and the mixing ratio is unstable, or the residual gas after mixing failure or use can be exhausted.

[0061] In the present invention, a waste discharge interface 63 is provided at one end of the waste discharge pipe 6 away from the mixing chamber 3; a fourth diaphragm valve 61 is provided on the waste discharge pipe 6; a fourth one-way valve 62 is provided between the fourth diaphragm valve 61 and the waste discharge interface 63; the fourth diaphragm valve 61 also serves to shut off the gas under special circumstances, and the fourth one-way valve 62 only allows the exhaust gas to flow out of the mixing chamber 3 in one direction.

[0062] After the exhaust gas enters the exhaust pipe 6 from the mixing chamber 3 , it passes through the fourth diaphragm valve 61 and the fourth one-way valve 62 in sequence and is discharged from the exhaust port 63 .

[0063] The control button 931 also includes a waste discharge button and a liquefaction button. When the waste discharge button is pressed, the gas in the mixing chamber 3 is discharged from the waste discharge pipe 6; conversely, when the liquefaction button is pressed, the gas in the mixing chamber 3 is passed into the liquefaction chamber 5 through the outlet pipe 45.

[0064] Example 4, still as Figs. 1 to 4 The figure shown is only one embodiment of the present invention. On the basis of any of the above embodiments, in a refrigerant preparation rack of the present invention, an observation window 81 is provided on the side of the mixing zone away from the freezing zone, and the instrument data at the first inlet pipe 1, the second inlet pipe 2, the mixing chamber 3, the waste pipe 6 and the output pipe 4 can be seen through the observation window 81; a vent 82 is provided on the side of the mixing zone to ensure that the mixing zone has a ventilation effect, and the temperature and pressure in the mixing zone are both room temperature pressure; on the contrary, the freezing zone is sealed to ensure that the cold air in the freezing zone does not leak.

[0065] Here, the side of the partition plate 7 close to the mixing chamber 3 is provided with a shockproof layer 71, and the side of the partition plate 7 close to the first inlet pipe 1, the second inlet pipe 2, the mixing chamber 3, the output pipe 4 and the waste pipe 6, that is, the shockproof layer 71 side is the normal temperature part, and the pressure and detection data need to be controlled, and a shock-proof and stable working environment is required; the side of the partition plate 7 close to the liquefaction chamber 5 is provided with a heat insulation layer 72, and the side of the partition plate 7 close to the liquefaction chamber 5, that is, the heat insulation layer 72 side is the low-temperature part. Although the outside of the freezing chamber 51 is definitely an insulating material, it is unavoidable that the side of the partition plate 7 close to the heat insulation layer 72 is the low-temperature environment side. The heat insulation layer 72 can stably ensure that the low temperature does not invade the other side when there is a leak in the freezing chamber 51, and the entire refrigerant preparation is more stable and safe.

[0066] In the present invention, the partition plate 7 is provided with a through hole for facilitating the passage of the output pipe 4 .

[0067] In the present invention, the observation window 81 is provided with an observation glass or an observation net, and the instrument data at the first inlet pipe 1, the second inlet pipe 2, the mixing chamber 3, the waste pipe 6 and the output pipe 4 can be seen through the observation window 81.

[0068] Of course, the number of the warning light 921 and the control button 931 is at least one.

[0069] Finally, the lower side of the control box 9 is provided with a support frame 94 for protecting the whole device from moisture and vibration damage; and the support frame 94 is an insulating member to avoid the risk of electric shock.

[0070] The refrigerant preparation frame has the advantages of simple structure, small occupied area, good integration, mixing of ethane and propane gas to obtain ethane-propane mixed gas in the mixing area on the front side of the function box, liquefaction of the ethane-propane mixed gas in the refrigeration area on the rear side of the function box, monitoring and control of the mixing and liquefaction operation at the control box below the function box, high safety, low installation cost and high efficiency and stability of refrigerant preparation.

[0071] The utility model is not limited to the above specific implementation, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement etc. according to the technical essence of the utility model to the above implementation is included in the protection scope of the utility model.

Claims

1. A cryogen production stand, characterized by: The utility model provides a kind of refrigeration device, including function box (8) and control box (9) being arranged in the lower side of the function box (8), the partition plate (7) of the middle part of the function box (8) is divided into mixing area and refrigeration area;First inlet pipe (1), second inlet pipe (2) and mixing cavity (3) are arranged in the mixing area;Liquidized cavity (5) for communicating with the mixing cavity (3) is arranged in the refrigeration area;Display screen (91) is arranged in the side of the control box (9), high-pressure area (92) is arranged in the side of the display screen (91), warning light (921) is arranged in the high-pressure area (92), low-pressure area (93) is arranged in the side of the display screen (91) away from the high-pressure area (92), and control button (931) is arranged in the low-pressure area (93).

2. A cryogen production stand as claimed in claim 1, characterized in that: Observation window (81) is arranged in the side of the mixing area away from the refrigeration area, and ventilation opening (82) is arranged in the side of the mixing area;The refrigeration area is sealingly arranged.

3. The cryogen production frame of claim 1, wherein; Output pipe (4) is arranged in the function box (8), and the first inlet pipe (1), second inlet pipe (2) and output pipe (4) are communicated with the mixing cavity (3);The liquidized cavity (5) is communicated with the end of the output pipe (4) away from the mixing cavity (3);Perforation is arranged on the partition plate (7) for facilitating the output pipe (4) to pass through.

4. The cryogen production frame of claim 2, wherein: Observation glass is arranged on the observation window (81).

5. The cryogen production apparatus of claim 1, wherein: Support frame (94) is arranged in the lower side of the control box (9), and the support frame (94) is an insulating part.

6. The cryogen production apparatus of claim 1, wherein: The number of the warning light (921) and the control button (931) is at least one.

7. The cryogen production apparatus of claim 3, wherein: Controller (95) is arranged in the control box (9), and the display screen (91), warning light (921) and control button (931) are electrically connected with the controller (95).

8. The cryogen production apparatus of claim 1, wherein: First flow sensor (15) is arranged on the first inlet pipe (1), first one-way valve (17) is arranged on the side of the first flow sensor (15) close to the mixing cavity (3), and first diaphragm valve (13) is arranged on the side of the first flow sensor (15) away from the mixing cavity (3);Second flow sensor (25) is arranged on the second inlet pipe (2), second one-way valve (27) is arranged on the side of the second flow sensor (25) close to the mixing cavity (3), and second diaphragm valve (23) is arranged on the side of the second flow sensor (25) away from the mixing cavity (3);Barometer (41) and third one-way valve (43) are arranged on the output pipe (4).

9. A cryogen production stand according to claim 8, wherein: Liquidized cavity (5) is arranged outside the liquidized cavity (5).

10. The cryogen production apparatus of claim 8, wherein: The mixing cavity (3) is communicated with waste pipe (6).

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