Tunnel type variable-frequency variable-voltage rod electrode array coupling liquid nitrogen refrigeration equipment

Abstract

The utility model is suitable for the technical field of freezing equipment, and provides tunnel type variable-frequency variable-voltage rod electrode array coupling liquid nitrogen freezing equipment which comprises a freezing tunnel and a conveying belt penetrating through the interior of the freezing tunnel. An electric field device is further arranged in the freezing tunnel, the electric field device comprises an electric field generator, a frequency converter and a plurality of rod electrodes, and the rod electrodes are uniformly distributed in the freezing tunnel; the electric field generator is electrically connected with a plurality of frequency converters arranged in the freezing tunnel, so that an electric field is uniformly distributed in the freezing tunnel; a liquid nitrogen spraying device is further arranged in the freezing tunnel, and the liquid nitrogen spraying device is used for spraying liquid nitrogen. The quick freezing device is high in applicability and can be used for quickly freezing various fresh meat such as fish meat, livestock meat and poultry meat; and meanwhile, the controllability is high, and parameters such as frequency, voltage and freezing rate can be adjusted.

Description

TECHNICAL FIELD

[0001] The utility model belongs to frozen equipment technical field especially relates to the tunnel type frequency conversion variable pressure rod electrode array coupling liquid nitrogen freezing equipment. BACKGROUND

[0002] Freezing generally inhibits microbial growth, reduces enzyme activity and prolongs the shelf life of meat.

[0003] With the improvement of people's living standards, there is a higher requirement for the quality of frozen meat products, and new freezing technologies are emerging, including magnetic field assisted freezing, electrostatic field assisted freezing, ultrasonic assisted freezing, etc. Electric field assisted freezing can destroy the cluster structure of water, making the larger water cluster structure smaller. At the same time, membrane potential difference is generated, which drives the directional movement of charged ions on both sides of the membrane, generates bioelectricity and drives biochemical reactions. Under the action of electric field, it can also delay cell metabolism by reducing oxidative phosphorylation level, so as to achieve the purpose of preservation. Electric field assisted freezing can shorten the phase change time of ice crystals, and the formed ice crystals are relatively small, round, more in number and uniformly distributed.

[0004] At present, electric field assisted freezing has the problem of parameter optimization. Different meat materials and different freezing stages require different optimal electric field parameters, and some equipment has the problem of uneven electric field distribution and insufficient stability. UTILITY MODEL CONTENT

[0005] The purpose of the utility model embodiment is to provide a tunnel type frequency conversion variable pressure rod electrode array coupling liquid nitrogen freezing equipment, which aims to solve the problem of parameter optimization in electric field assisted freezing. Different meat materials and different freezing stages require different optimal electric field parameters, and some equipment has the problem of uneven electric field distribution and insufficient stability.

[0006] To achieve the above purpose, the utility model embodiment provides the following technical scheme.

[0007] The tunnel type frequency conversion variable pressure rod electrode array coupling liquid nitrogen freezing equipment comprises a freezing tunnel and a conveying belt penetrating the inside of the freezing tunnel.

[0008] The freezing tunnel is also provided with an electric field device, which comprises an electric field generator, a frequency converter and a rod electrode. The rod electrodes are evenly distributed in the inside of the freezing tunnel. The electric field generator is electrically connected with the frequency converters arranged in the freezing tunnel, so that the electric field is uniformly distributed in the freezing tunnel.

[0009] The freezing tunnel is also provided with a liquid nitrogen spraying device, which is used for spraying liquid nitrogen.

[0010] Further, the liquid nitrogen spraying device comprises a fixed outer ring supported and arranged in the freezing tunnel, wherein the fixed outer ring is fixedly arranged in the freezing tunnel through supporting legs, a rotating inner ring is coaxially arranged on the fixed outer ring, the rotating inner ring is located in the inner ring of the fixed outer ring, a spraying rod is fixedly arranged on the rotating inner ring, and the spraying rod is parallel to the conveying belt; and a plurality of nozzles are equidistantly arranged on the spraying rod and used for spraying liquid nitrogen.

[0011] Further, one end of the spraying rod is connected with a conveying hose, the other end of the conveying hose is connected with a liquid nitrogen conveying pipe, the other end of the liquid nitrogen conveying pipe is connected with a liquid nitrogen tank, and the liquid nitrogen tank is arranged to provide liquid nitrogen for the nozzles, so that the liquid nitrogen is further sprayed by the nozzles.

[0012] Further, a bracket is further fixedly arranged on the fixed outer ring, and a stepping motor for driving the rotating inner ring to rotate relative to the fixed outer ring is arranged on the bracket.

[0013] Further, a driving gear is arranged on the output shaft of the stepping motor, a tooth surface meshing with the driving gear is arranged on the inner ring of the rotating inner ring, and the stepping motor is a bidirectional motor, that is, the stepping motor can rotate in a forward direction or in a reverse direction; therefore, the motion position of the spraying rod is controlled by controlling the starting and driving direction of the stepping motor, so that the nozzles spray liquid nitrogen on the materials on the conveying belt according to the required angle.

[0014] Compared with the prior art, the tunnel type variable frequency variable voltage rod electrode array coupling liquid nitrogen freezing equipment has the following beneficial effects:

[0015] Firstly, the electric field device with variable frequency and variable voltage is used to control the electric field intensity in different regions and stages, so that different meat qualities pass through each stage corresponding to the most suitable electric field, and the phase change time is shortened.

[0016] Secondly, the electric field intensity is controlled in different regions and stages by using the variable frequency and variable voltage, so that the cooling time and the phase change time are shortened, the freezing efficiency is improved, the juice loss rate is reduced, and the meat quality is improved; the multiple rod electrodes are used for discharging, so that the freezing uniformity is improved, and the product quality after thawing is good; and the electric field regulation and control mode with variable frequency and variable voltage is used, so that the electric field output intensity in different stages can be effectively controlled, and the freezing rate is improved.

[0017] Thirdly, when the rotating inner ring rotates relative to the fixed outer ring by a certain angle, the spraying rod can move in an arc path, the angle of the nozzles towards the conveying belt changes, the liquid nitrogen sprayed is uniformly covered on the surface of the materials to be frozen, and the freezing effect on the materials is improved.

[0018] In summary, the utility model discloses strong applicability can be used for fish, meat, poultry meat and the quick freezing of various kinds of fresh meat, and simultaneously, controllability is strong, and the frequency, voltage, freezing rate and so on can be adjusted. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the following will be to the embodiment or the description of prior art needed to use the drawing briefly introduce, obviously, the following description in the drawing only some embodiments of the utility model.

[0020] Figure 1 The structural diagram of the tunnel type variable frequency variable voltage rod electrode array coupling liquid nitrogen freezing equipment is provided.

[0021] Figure 2 The three-dimensional structural diagram of the liquid nitrogen spraying device in the tunnel type variable frequency variable voltage rod electrode array coupling liquid nitrogen freezing equipment is provided.

[0022] Figure 3 The liquid nitrogen spraying device is provided. Figure 2 The side view of the liquid nitrogen spraying device is provided.

[0023] The reference signs are as follows:

[0024] 11, electric field generator;12, conveying belt;13, frequency converter;14, rod electrode;15, liquid nitrogen tank;151, liquid nitrogen delivery pipe;152, delivery hose;16, freezing tunnel;17, liquid nitrogen spraying device;171, leg;172, fixed outer ring;173, support;174, stepping motor;175, driving gear;176, rotating inner ring;177, tooth surface;178, spraying rod;179, nozzle. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the following combines the drawing and embodiment, and the utility model is further described in detail.It should be understood that the specific embodiment described here is only used to explain the utility model, and is not used to limit the utility model.

[0026] The specific implementation of the utility model is described in detail in the following combined with specific embodiments.

[0027] As Figure 1 As shown in the utility model in one embodiment, the tunnel type variable frequency variable voltage rod electrode array coupling liquid nitrogen freezing equipment is provided, including freezing tunnel 16 and the conveying belt 12 that is through in the inside of freezing tunnel 16, the conveying belt 12 that is set generally drives its operation through motor, to send the material that needs to be frozen into freezing tunnel 16 and carries out freezing treatment;

[0028] The electric field device is arranged in the freezing tunnel 16, and the electric field device comprises an electric field generator 11, a frequency converter 13 and rod electrodes 14.

[0029] Preferably, the electric field generated by the electric field device is uniformly distributed in the conveying space inside the freezing tunnel 16.

[0030] The utility model discloses a freezing tunnel and electric field device, which can realize the fast freezing of the material.

[0031] Further, in the embodiment of the utility model, the freezing tunnel 16 still be provided with liquid nitrogen spraying device 17, liquid nitrogen spraying device 17 is used for the spraying of liquid nitrogen, the material used in the space inside the freezing tunnel 16 should be insulating material or be pasted with insulating board, material enters the freezing tunnel 16 slowly through the conveying belt 12, liquid nitrogen spraying device 17 and electric field device act on the material together, and liquid nitrogen and electric field are uniformly distributed in the space inside the freezing tunnel 16, and the material successively passes through the electric field of precooling area, phase change area, supercooling area in the conveying process, realizes the fast freezing.

[0032] Please refer to Figure 2 and Figure 3In the embodiment of the utility model, multiple rod electrodes 14 are distributed and arranged in the precooling zone, the phase change zone and the supercooling zone in the refrigeration tunnel 16, the liquid nitrogen spraying device 17 provided by the embodiment of the utility model comprises a fixed outer ring 172 which is supported and arranged in the refrigeration tunnel 16, wherein the fixed outer ring 172 is supported and fixedly installed in the refrigeration tunnel 16 through the supporting leg 171, a rotating inner ring 176 is coaxially arranged on the fixed outer ring 172, the rotating inner ring 176 is located in the inner ring of the fixed outer ring 172, a spraying rod 178 is fixedly installed on the rotating inner ring 176, and the spraying rod 178 is arranged in parallel with the conveying belt 12; multiple nozzles 179 are arranged on the spraying rod 178 at equal intervals, the nozzles 179 are used for spraying liquid nitrogen, when the rotating inner ring 176 of the utility model rotates at a certain angle relative to the fixed outer ring 172, the spraying rod 178 can move along an arc path, the angle of the nozzles 179 relative to the conveying belt 12 changes, and the sprayed liquid nitrogen uniformly covers the surface of the material to be frozen, thereby improving the freezing effect on the material.

[0033] The liquid nitrogen has extremely low temperature and high thermal conductivity, and maintains a low-temperature environment.

[0034] The running speed of the conveying belt 12 and the liquid nitrogen spraying density of the liquid nitrogen spraying device 17 determine the freezing efficiency, and the running speed of the conveying belt 12 and the spraying density of the liquid nitrogen spraying device 17 can be reasonably set by the person skilled in the art according to the needs.

[0035] Please continue to refer to Figure 2 And Figure 3 In the embodiment of the utility model, the spraying rod 178 is connected with one end of the conveying hose 152, the other end of the conveying hose 152 is connected with the liquid nitrogen conveying pipe 151, the other end of the liquid nitrogen conveying pipe 151 is connected with the liquid nitrogen tank 15, the liquid nitrogen tank 15 is arranged to provide liquid nitrogen for the nozzles 179, so that the nozzles 179 are used for spraying liquid nitrogen; it can be understood that when the nozzles 179 spray liquid nitrogen, the person skilled in the art can reasonably set the corresponding power source (such as an electric turbine liquid nitrogen pump) according to the needs, and send the liquid nitrogen in the liquid nitrogen tank 15 to the nozzles 179 for spraying.

[0036] Please continue to refer to Figure 2In the embodiment of the utility model, the fixed outer ring 172 is also provided with a support 173, the support 173 is installed with a stepping motor 174 for driving the rotating inner ring 176 to rotate relative to the fixed outer ring 172, wherein the output shaft of the stepping motor 174 is installed with a driving gear 175, the inner ring of the rotating inner ring 176 is provided with a tooth surface 177 meshing with the driving gear 175, and the stepping motor 174 is a bidirectional motor, that is, the stepping motor 174 can rotate forward or reversely, therefore, the utility model controls the starting and driving direction of the stepping motor 174 to control the movement position of the spray rod 178, so that the nozzle 179 sprays liquid nitrogen on the material on the conveying belt 12 according to the required angle.

[0037] In conclusion, the utility model has strong applicability, can be used for the quick freezing of various fresh meat such as fish meat, livestock meat and poultry meat, and has strong controllability, and can adjust parameters such as frequency, voltage and freezing rate.

[0038] The above-mentioned schemes are only used for describing a preferred embodiment, but are not limited to this. In the implementation of the utility model, proper replacement and / or modification can be made according to the requirements of users.

[0039] The number of devices and the processing scale described herein are used to simplify the description of the utility model. The application, modification and change of the utility model are obvious to those skilled in the art.

[0040] Although the embodiments of the utility model have been disclosed as above, it is not limited to the application listed in the specification and the embodiments. It can be fully applied to various fields suitable for the utility model. Those skilled in the art can easily realize other modifications. Therefore, the utility model is not limited to specific details and the figures shown and described herein without departing from the general concept defined by the claims and the equivalent range.

Claims

1. A tunneling variable frequency variable voltage rod electrode array coupled liquid nitrogen freezing apparatus, characterized in that, The freezing tunnel (16) and the conveying belt (12) inside the freezing tunnel (16) are provided. The freezing tunnel (16) is also provided with an electric field device, which includes an electric field generator (11), a frequency converter (13) and a rod electrode (14). The rod electrode (14) is uniformly distributed inside the freezing tunnel (16). The electric field generator (11) is electrically connected with the frequency converter (13) arranged inside the freezing tunnel (16). The freezing tunnel (16) is also provided with a liquid nitrogen spraying device (17) for spraying liquid nitrogen.

2. The tunneling variable-frequency variable-voltage rod electrode array coupling liquid nitrogen freezing apparatus according to claim 1, characterized in that, The liquid nitrogen spraying device (17) includes a fixed outer ring (172) supported in the freezing tunnel (16), wherein the fixed outer ring (172) is supported and fixedly installed in the freezing tunnel (16) by a supporting leg (171). A rotating inner ring (176) is coaxially arranged on the fixed outer ring (172) and located in the inner ring of the fixed outer ring (172). A spraying rod (178) is fixedly installed on the rotating inner ring (176) and parallel to the conveying belt (12). A plurality of nozzles (179) are equidistantly arranged on the spraying rod (178) and used for spraying liquid nitrogen.

3. The tunneling variable-frequency variable-voltage rod electrode array coupling liquid nitrogen freezing apparatus according to claim 2, characterized in that, The spraying rod (178) is connected with one end of a conveying hose (152), the other end of the conveying hose (152) is connected with a liquid nitrogen conveying pipe (151), and the other end of the liquid nitrogen conveying pipe (151) is connected with a liquid nitrogen tank (15).

4. The tunneling variable-frequency variable-voltage rod electrode array coupling liquid nitrogen freezing apparatus according to claim 3, characterized in that, A bracket (173) is also fixedly arranged on the fixed outer ring (172), and a stepping motor (174) for driving the rotating inner ring (176) to rotate relative to the fixed outer ring (172) is installed on the bracket (173).

5. The tunneling variable-frequency variable-voltage rod electrode array coupling liquid nitrogen freezing apparatus according to claim 4, characterized in that, The output shaft of the stepping motor (174) is provided with a driving gear (175), the inner ring of the rotating inner ring (176) is provided with a tooth surface (177) engaged with the driving gear (175), and the stepping motor (174) is a bidirectional motor.

Images