Household freeze-drying machine and freeze-drying bin

Abstract

The utility model relates to a household freeze dryer which comprises a bin body with an inner cavity. The bin door is connected with one end of the bin body; the tray bracket is positioned in the inner cavity of the bin body and is matched with the bin body; the tray is provided with a heating structure and is mounted on the tray bracket; one end of the exhaust pipe assembly is located in the bin body, and the other end of the exhaust pipe assembly is located outside the bin body; the evaporation pipe is mounted in the bin body and used for allowing a cooling medium to flow so as to improve the refrigeration efficiency; the fan is matched with the evaporation pipe to improve the refrigeration efficiency, and the fan is arranged in the bin body. The refrigerating efficiency can be improved, and the vacuum pump can be prevented from being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of freeze drying, in particular to a household freeze drying machine and a freeze drying chamber. Background Art

[0002] Freeze drying is also called sublimation drying. It is a drying method that freezes water-containing materials below freezing point, converts water into ice, and then converts ice into steam under a relatively high vacuum to remove it. The material can be frozen in a freezing device first and then dried. However, it can also be frozen directly in the drying room by quickly evacuating it. The water vapor generated by sublimation is removed by a condenser. The vaporization heat required in the sublimation process is generally supplied by thermal radiation.

[0003] The existing freeze dryer includes a cooling system, which includes an evaporator, a compressor and a condenser. Refrigerant flows in the evaporator. The evaporator is evenly distributed on the outer wall of the inner cylinder in a spiral shape with the inner cylinder as the center and fits with the inner cylinder. The evaporator, compressor and condenser are connected in sequence through pipelines to form a circulation loop.

[0004] In the above cooling system, since the evaporating tube is evenly distributed on the outer wall of the inner tube in a spiral shape with the inner tube as the center and fits with the inner tube, the defects of this structure are as follows:

[0005] First, the evaporator tube is isolated by the inner cylinder, and the heat exchange effect on the inner space of the inner cylinder is poor, resulting in a long pre-cooling stage.

[0006] Second, during the vacuum drying and sublimation stage, the water vapor generated by sublimation needs to be removed by the condenser, that is, the refrigerant is made to flow along the evaporator tube through the condenser to make the sublimated water vapor freeze on the inner wall of the inner tube as much as possible. However, the above point 1 has already shown that the evaporator tube has a poor heat exchange effect on the internal space of the inner tube. Therefore, this structure can only make a small part of the water vapor generated by sublimation condense into ice on the inner wall surface of the inner tube, and most of the water vapor enters the vacuum pump with the vacuum extraction, causing the silicone oil in the vacuum pump to be emulsified. After a period of use, the vacuum pump will be damaged.

[0007] Third, when the door is opened to take out the freeze-dried products, the ice layer on the inner wall of the inner cylinder is thin and is easily melted by the temperature difference between the inside and outside of the inner cylinder, causing the melted water to drop onto the freeze-dried products that have not been taken out, causing the freeze-dried products to absorb water and regain moisture, resulting in the water content of the product exceeding the standard. Utility Model Content

[0008] The utility model provides a household freeze drying machine and a freeze drying chamber. The utility model can not only improve the refrigeration efficiency but also avoid damage to the vacuum pump.

[0009] The utility model is realized by the following technical solutions:

[0010] The freeze drying chamber of the household freeze dryer includes:

[0011] A chamber body having an inner cavity;

[0012] A warehouse door connected to one end of the warehouse body;

[0013] A tray support, the tray support is located in the inner cavity of the bin body and cooperates with the bin body;

[0014] A tray with a heating structure, wherein the tray is mounted on a tray support;

[0015] An air extraction pipe assembly, one end of which is located in the bin body, and the other end of which is located outside the bin body; and further comprising:

[0016] An evaporator tube installed in the silo for the cooling medium to flow to improve the refrigeration efficiency;

[0017] A fan cooperates with the evaporating tube to improve the refrigeration efficiency, and the fan is arranged in the bin body.

[0018] Furthermore, the fan includes a fan bracket and a fan, the fan bracket is arranged in the bin body, and the fan is installed on the fan bracket.

[0019] Furthermore, the evaporation tube is located on a side of the tray support.

[0020] Furthermore, the bin body includes a cylinder and a rear cover, and the rear cover is fixed to the cylinder;

[0021] The evaporator tube comprises an evaporator tube body and a tube clamp. The evaporator tube body is fixed to the tube clamp, and the tube clamp is fixed to the cylinder.

[0022] Furthermore, the bin body includes a cylinder and a rear cover, and the rear cover is fixed to the cylinder;

[0023] The evaporator tube comprises an evaporator tube body, a tube clamp and a support rod. The evaporator tube body is fixed to the tube clamp, the tube clamp is connected to the support rod, and the support rod is fixed to the rear cover.

[0024] Furthermore, the evaporating tube is a U-shaped coil.

[0025] Furthermore, the exhaust pipe assembly includes an exhaust pipe and a partition, one end of the exhaust pipe is fixed to the partition, the partition is located between the evaporating pipe and the exhaust pipe, and an air inlet is provided on the circumferential surface of the exhaust pipe.

[0026] Furthermore, the evaporation tube is a vortex coil.

[0027] Furthermore, it also includes a first baffle in the shape of an arch, wherein one end of the first baffle having a chord is fixed to the tray bracket, and the other end of the first baffle having an arc-shaped edge is matched with the inner wall surface of the warehouse body.

[0028] The household freeze dryer comprises a vacuum pump, a compressor, a condenser and a freeze drying chamber of the household freeze dryer. The vacuum pump is connected to an exhaust pipe assembly, and the evaporation pipe, the compressor and the condenser are connected through pipelines to form a circulation loop.

[0029] In the utility model, the evaporator tube and the fan are built into the warehouse body, and the cooling medium flows along the evaporator tube. This structure not only enables the evaporator tube to directly exchange heat with the interior of the warehouse body, thereby improving the refrigeration efficiency in the warehouse body, but also the airflow generated by the fan acts on the evaporator tube, so that the cold in the evaporator tube can be heat-exchanged with the interior of the warehouse body more quickly, thereby further improving the refrigeration efficiency in the warehouse body. In the pre-cooling stage, the pre-cooling speed can be accelerated. Since the evaporator tube and the fan cooperate to improve the refrigeration efficiency, in the vacuum drying and sublimation stage, the water vapor generated by the sublimation can be more easily condensed on the inner wall of the warehouse body, thereby greatly reducing the water vapor entering the vacuum pump during vacuuming, thereby protecting the vacuum pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of a household freeze dryer of the present utility model.

[0031] Figure 2 This is a schematic diagram of the freeze-drying chamber of a household freeze dryer.

[0032] Figure 3 This is the assembly drawing of the pallet bracket and pallet.

[0033] Figure 4 A schematic diagram of a tray.

[0034] Figure 5 This is a diagram of the interior structure of the first type of freeze-drying chamber.

[0035] Figure 6 This is the assembly drawing of the exhaust pipe assembly and the fan.

[0036] Figure 7 This is a structural diagram of the interior of the second freeze-drying chamber.

[0037] Markings in the attached drawings:

[0038] Bin body 1, cylinder body 1a, back cover 1b, connecting seat 1c, bin door 2, tray bracket 3, plug interface 3a, tray 4, tray body 4a, heating component 4b, plug component 4c, baffle 4d, exhaust pipe assembly 5, exhaust pipe 5a, partition 5b, air inlet 5c, evaporation tube 6, evaporation tube body 6a, tube clamp 6b, support rod 6c, fan bracket 7, fan 8, first baffle 9, vacuum pump 10, compressor 11, bracket 12, upper layer 12a, lower layer 12b, touch screen 13, storage box 14. DETAILED DESCRIPTION

[0039] The utility model is further described below in conjunction with the accompanying drawings:

[0040] like Figures 1 to 7 As shown, the household freeze dryer of the utility model comprises a bin body 1, a bin door 2, a tray support 3, a tray 4 with a heating structure, an exhaust pipe assembly 5, an evaporation pipe 6, and a fan. The relationship between each part and the other is described in detail below:

[0041] The bin body 1 has an inner cavity, and the bin door 2 is connected to one end of the bin body 1. In this embodiment, the bin body 1 includes a cylinder 1a and a rear cover 1b. The cylinder 1a is cylindrical, and both ends of the cylinder 1a have openings. The bin door 2 is connected to one end of the cylinder 1a. The connection method between the bin door 2 and the cylinder 1a is the existing technology and will not be repeated here. The rear cover 1b is fixed to the cylinder 1a, and the rear cover 1b is fixed to the other end of the cylinder 1a. A connecting seat 1c is provided on the circumference of the cylinder 1a. After the end cover 1b is matched with the other end of the cylinder 1a, a screw is passed through the end cover 1b and connected to the connecting seat 1c, so that the end cover 1b and the bin body 1a are fastened into one.

[0042] The tray bracket 3 is located in the inner cavity of the warehouse body 1 and cooperates with the warehouse body 1; the tray bracket 3 is composed of multiple columns and multiple tie rods, and two adjacent columns are connected by a tie rod. One end of the column can be fixed to the warehouse body 1 by welding, and each column is provided with a plug interface 3a, which is L-shaped.

[0043] The tray 4 is mounted on the tray support 3. In this embodiment, the tray 4 includes a tray body 4a and a heating component 4b. The tray body 4a is in a rectangular shape. The left and right sides of the tray body 4a are provided with plug-in components 4c. The front end of the tray body 4a is provided with a baffle 4d. The plug-in component 4c is inserted into the plug port 3a to form a sliding fit. The baffle 4d cooperates with the column to limit the position of the tray 4. This structure facilitates the assembly of the tray body 4a and the tray support 3, and the tray 4 can be pulled out when in use.

[0044] Of course, the tray body 4a and the tray bracket 3 may also be fixed in other ways, such as welding, screw connection, etc. These ways are conventional ways and will not be described in detail here.

[0045] In addition, the heating component 4b can be heated by electricity or fluid medium. The electric heating can be composed of a heat conduction box and a heating pipe, the heating pipe is located in the heat conduction box, and the heat conduction box cooperates with the tray body 4a. The fluid medium heating can adopt the structure of the radiant heat plate of CN211204964U.

[0046] One end of the exhaust pipe assembly 5 is located inside the warehouse body 1, and the other end of the exhaust pipe assembly 5 is located outside the warehouse body 1. In this embodiment, the exhaust pipe assembly 5 includes an exhaust pipe 5a and a partition 5b, one end of the exhaust pipe 5a is fixed to the partition 5b, and the partition 5b is located between the evaporation tube 6 and the exhaust pipe 5a. An air inlet 5c is provided on the circumferential surface of the exhaust pipe 5a, and the other end of the exhaust pipe 5a is exposed outside the warehouse body 1 after passing through the rear cover 1b.

[0047] Through the action of the partition 5b, on the one hand, one end of the exhaust pipe 5a is closed, and on the other hand, the partition 5b is used to isolate the airflow generated by the fan to avoid directly extracting the airflow generated by the fan during vacuum extraction. In this way, the airflow generated by the fan can be extracted only after it interacts with the evaporation tube 6, thereby ensuring that the refrigeration efficiency is improved.

[0048] The evaporation tube 6 is installed in the warehouse body 1 for the cooling medium to flow so as to improve the refrigeration efficiency. The fan cooperates with the evaporation tube 6 to improve the refrigeration efficiency. The fan is arranged in the warehouse body 1.

[0049] In this embodiment, the evaporator tube 6 and the fan are built into the warehouse body 1, and the cooling medium flows along the evaporator tube 6. This structure not only allows the evaporator tube 6 to directly exchange heat with the interior of the warehouse body 1, thereby improving the refrigeration efficiency in the warehouse body 1, but also the airflow generated by the fan acts on the evaporator tube 6, so that the cold in the evaporator tube 6 can be heat-exchanged with the interior of the warehouse body 1 more quickly, thereby further improving the refrigeration efficiency in the warehouse body 1. In the pre-cooling stage, the pre-cooling speed can be accelerated. Since the evaporator tube 6 cooperates with the fan to improve the refrigeration efficiency, in the vacuum drying and sublimation stage, the water vapor generated by the sublimation can be more easily condensed on the inner wall of the warehouse body 1, thereby greatly reducing the water vapor entering the vacuum pump during vacuuming, thereby protecting the vacuum pump.

[0050] The evaporation tube 6 is located at the side of the tray support 3, for example, the evaporation tube 6 is located at the left side, or the right side, or the front side, or the rear side of the tray support 3, or surrounds the support 3, or in other ways, the position of the evaporation tube 6 is set according to the actual space in the cylinder 1a. The positional relationship between the evaporation tube 6 and the tray support 3 is described by the following specific examples:

[0051] The first type is that the evaporating tube 6 is arranged on the left and right sides of the tray bracket 3. In this case, the evaporating tube 6 includes an evaporating tube body 6a and a tube clamp 6b. The evaporating tube body 6a is fixed to the tube clamp 6b, and the tube clamp 6b is fixed to the cylinder 1a. The evaporating tube body 6a preferably adopts a U-shaped coil, and the tube clamp 6b clamps the evaporating tube body 6a. The two ends of the tube clamp 6b are fixed to the cylinder 1a. The two ends of the tube clamp 6b are preferably fixed to the cylinder 1a by welding. The evaporating tube body 6a can be one group or multiple groups. For the first type, the evaporating tube body 6a located on the left and right sides of the tray bracket 3 are three groups respectively, and each group is preferably fixed with two tube clamps.

[0052] The second method is that the evaporating tube 6 is arranged at the rear side of the tray bracket 3. In this case, the evaporating tube 6 includes an evaporating tube body 6a, a tube clamp 6b, and a support rod 6c. The evaporating tube body 6a is fixed to the tube clamp 6b, the tube clamp 6b is connected to the support rod 6c, and the support rod 6c is fixed to the rear cover 1b. The evaporating tube body 6a preferably adopts a spiral coil, and the spiral coil can adopt one or more groups. For the second method, the spiral coil preferably adopts five groups.

[0053] The fan includes a fan bracket 7 and a fan 8. The fan bracket 7 is arranged in the bin body 1, and the fan 8 is mounted on the fan bracket 7. The fan can be arranged at the front side, rear side, upper side, etc. of the tray bracket 3. In this embodiment, the fan is preferably arranged at the rear side of the tray bracket 3. When the first type of evaporation tube 6 is arranged on the left and right sides of the tray bracket 3, the bracket 7 is fixed to the partition 5b or the cylinder 1a. When the second type of evaporation tube 6 is arranged on the rear side of the tray bracket 3, the bracket 7 is preferably fixed to the tube clamp 6b. In addition, there are one or more fans 8.

[0054] This embodiment further includes a first baffle plate 9 in an arched shape, one end of the first baffle plate 9 having a chord is fixed to the tray support 3, and the other end of the first baffle plate 9 having an arc edge is matched with the inner wall surface of the warehouse body 1. Through the blocking effect of the first baffle plate 9, the heat exchange between the interior of the warehouse body 1 and the outside can be reduced when the warehouse door 2 is opened, thereby hindering the temperature drop rate inside the warehouse body 1. The ice layer condensed on the inner wall of the warehouse body 1 will not melt as much as possible.

[0055] The utility model also provides a household freeze dryer, including a vacuum pump 10, a compressor 11, and a freeze drying chamber of the above embodiment, wherein the vacuum pump 10 is connected to the exhaust pipe assembly 5, and the household freeze dryer also includes a bracket 12, which has at least an upper layer 12a and a lower layer 12b, wherein the freeze drying chamber is installed on the upper layer 12a, and the vacuum pump 10, the compressor 11, and the condenser 13 are preferably installed on the lower layer 12b. The evaporation tube 6, the compressor 11, and the condenser 13 are connected by pipelines to form a circulation loop, and the connection relationship between the evaporation tube 6, the compressor 11, and the condenser 13 is a prior art and is not described here. Rollers or wheels (not shown in the figure) can also be provided at the bottom of the bracket 12 to facilitate the movement of the cooling dryer.

[0056] The household freeze dryer of the present invention further comprises a touch screen 14. The support 12 also has a top layer 12c, and the touch screen 14 is mounted on the top layer 12c. The condenser 13 can also be mounted in the area of ​​the top layer 12c.

Claims

1. The freeze drying chamber of the household freeze dryer includes: A chamber body (1) having an inner cavity; A door (2), the door (2) being connected to one end of the warehouse body (1); A tray support (3), the tray support (3) is located in the inner cavity of the bin body (1) and cooperates with the bin body (1); A tray (4) having a heating structure, wherein the tray (4) is mounted on a tray support (3); An air extraction pipe assembly (5), one end of the air extraction pipe assembly (5) is located inside the warehouse body (1), and the other end of the air extraction pipe assembly (5) is located outside the warehouse body (1); characterized in that it also includes: An evaporator tube (6) installed in the bin body (1) for allowing a cooling medium to flow so as to improve refrigeration efficiency; A fan cooperates with the evaporating tube (6) to improve the refrigeration efficiency, and the fan is arranged in the warehouse body (1).

2. The freeze drying chamber of the household freeze drying machine according to claim 1, characterized in that: The fan comprises a fan bracket (7) and a fan (8); the fan bracket (7) is arranged in the warehouse body (1), and the fan (8) is mounted on the fan bracket (7).

3. The freeze-drying chamber of the household freeze-drying machine according to claim 1, characterized in that: The evaporation tube (6) is located on the side of the tray support (3).

4. The freeze drying chamber of the household freeze drying machine according to claim 1, characterized in that: The bin body (1) comprises a cylinder (1a) and a rear cover (1b), wherein the rear cover (1b) is fixed to the cylinder (1a); The evaporation tube (6) comprises an evaporation tube body (6a) and a tube clamp (6b); the evaporation tube body (6a) is fixed to the tube clamp (6b), and the tube clamp (6b) is fixed to the cylinder (1a).

5. The freeze drying chamber of the household freeze drying machine according to claim 1, characterized in that: The bin body (1) comprises a cylinder (1a) and a rear cover (1b), wherein the rear cover (1b) is fixed to the cylinder (1a); The evaporation tube (6) comprises an evaporation tube body (6a), a tube clamp (6b), and a support rod (6c); the evaporation tube body (6a) is fixed to the tube clamp (6b); the tube clamp (6b) is connected to the support rod (6c); and the support rod (6c) is fixed to the rear cover (1b).

6. The freeze-drying chamber of the household freeze-drying machine according to claim 5, characterized in that: The evaporation tube (6) is a U-shaped coil.

7. The freeze-drying chamber of the household freeze-drying machine according to claim 1, characterized in that: The exhaust pipe assembly (5) comprises an exhaust pipe (5a) and a partition (5b), one end of the exhaust pipe (5a) is fixed to the partition (5b), the partition (5b) is located between the evaporation pipe (6) and the exhaust pipe (5a), and an air inlet (5c) is provided on the peripheral surface of the exhaust pipe (5a).

8. The freeze drying chamber of the household freeze drying machine according to claim 7, characterized in that: The evaporation tube (6) is a vortex coil.

9. The freeze-drying chamber of the household freeze-drying machine according to claim 1, characterized in that: It also comprises a first baffle plate (9) in the shape of an arch, wherein one end of the first baffle plate (9) having a chord is fixed to the tray support (3), and the other end of the first baffle plate (9) having an arc-shaped edge is matched with the inner wall surface of the warehouse body (1).

10. A household freeze dryer, comprising a vacuum pump (10), a compressor (11), and a condenser (13), characterized in that: It also includes a freeze-drying chamber of a household freeze dryer as described in any one of claims 1 to 9, wherein the vacuum pump (10) is connected to the exhaust pipe assembly (5), and the evaporation pipe (6), the compressor (11) and the condenser (13) are connected by pipelines to form a circulation loop.

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