阅读说明：本技术 风冷式冷冻工作台的制冷设备及其控制方法 (Refrigeration equipment of air-cooled refrigeration workbench and control method thereof ) 是由 艾志录 贺宇舵 李慧品 邢小龙 于 2019-06-06 设计创作，主要内容包括：本发明属于低温设备领域,具体涉及一种用于风冷式冷冻工作台的制冷设备。该风冷式冷冻工作台用制冷设备包括多块活动保温隔热板和与该活动保温隔热板传力连接的驱动装置,该活动保温隔热板在该驱动装置的带动下可逆地封闭该进风口和该出风口。本发明的制冷设备体积小巧,安装方便,可与多种型号的风冷式冷冻工作台的低温储藏箱体配套使用,设备通用性强；采用电加热化霜,化霜速度快、效率高,并且通过特殊设计的活动保温隔热板和保温隔热材料,有效地阻止了低温储藏箱体的冷量耗散,节约了能源。本发明进一步提供了与前述设备配套的控制方法,以使设备的节能高效等优势得以充分发挥。(The invention belongs to the field of low-temperature equipment, and particularly relates to refrigeration equipment for an air-cooled refrigeration workbench. The refrigerating equipment for the air-cooled refrigerating workbench comprises a plurality of movable heat-insulating plates and a driving device in force transmission connection with the movable heat-insulating plates, wherein the movable heat-insulating plates are driven by the driving device to reversibly seal the air inlet and the air outlet. The refrigeration equipment has small volume and convenient installation, can be matched with the low-temperature storage boxes of air-cooled refrigeration workbenches of various types for use, and has strong equipment universality; the electric heating defrosting is adopted, the defrosting speed is high, the defrosting efficiency is high, and the cold energy dissipation of the low-temperature storage box body is effectively prevented and the energy is saved through the specially designed movable heat-preservation heat-insulation plate and the heat-preservation heat-insulation material. The invention further provides a control method matched with the equipment, so that the advantages of energy conservation, high efficiency and the like of the equipment can be fully exerted.)

1. Air-cooled refrigeration plant for freezing workstation, including equipment box and refrigerating unit, the equipment box has a ventilation curb plate, air intake and air outlet are seted up to the ventilation curb plate, refrigerating unit includes compressor, evaporimeter and installs the defrosting firing equipment on the evaporimeter, its characterized in that: the air inlet and the air outlet are reversibly sealed by the movable heat-insulation board under the driving of the driving device.

2. The refrigerating apparatus for an air-cooled type refrigerating table as claimed in claim 1, wherein said air intake opening and said air outlet opening are provided above/below and below/above said ventilation side plate, respectively; the movable heat-insulation board comprises a first movable heat-insulation board and a second movable heat-insulation board which are connected with the ventilation side plate in a sliding mode, and the first movable heat-insulation board and the second movable heat-insulation board are respectively used for reversibly sealing the air inlet and the air outlet.

3. The refrigerating apparatus for an air-cooled type refrigerating table as claimed in claim 2, wherein said first movable heat-insulating board and said second movable heat-insulating board are suspended between said air inlet and said air outlet in a vertical direction when said refrigerating apparatus is operated for refrigeration.

4. The refrigerating apparatus for an air-cooled type refrigerating table as claimed in claim 1 ~ 3, wherein the ventilation side plate is provided with a plurality of sliding bars, and the movable heat insulating board is installed on the sliding bars and moves up and down along the sliding bars.

5. A cold appliance for an air-cooled freezer platen as claimed in any one of claims 1 to 1 ~ 3 wherein the movable thermal insulation panel is driven by a screw system selected from a trapezoidal screw or a ball screw, preferably a trapezoidal screw.

6. A cooling apparatus for an air-cooled refrigerating workbench according to any of claims 1 ~ 3, further comprising thermal insulating material applied to the inside and/or outside of said ventilated side panel, preferably to the inside of said ventilated side panel.

7. A refrigerating apparatus for an air-cooled refrigerating workbench according to claim 6, wherein the thickness of said thermal insulating material is 5-35mm, preferably 8-20 mm.

8. An air-cooled refrigerating table comprising a low-temperature storage box and the refrigerating apparatus of claim 1 ~ 7, wherein the refrigerating apparatus is capable of adjusting the temperature of the internal space of the low-temperature storage box, and further preferably, the low-temperature storage box and the refrigerating apparatus are respectively provided with a temperature sensor.

9. The method of controlling an air-cooled freezer platen as set forth in claim 8, including the steps of:

S10, the air-cooled refrigeration workbench enters a defrosting mode, the compressor of the refrigerating unit stops, and the movable heat-preservation and heat-insulation plate is driven by the driving device to seal the air inlet and the air outlet;

S20, the defrosting heating equipment starts to work, and after defrosting is finished, the defrosting heating equipment stops working;

S30, when or after the compressor is started, the movable heat-preservation heat-insulation plate is driven by the driving device to release the air inlet and the air outlet.

10. The control method according to claim 9, wherein the step S30 includes:

S301, starting the compressor of the refrigerating unit, and keeping the movable heat-preservation and heat-insulation plate closed to the air inlet and the air outlet;

S302, the refrigerating unit starts to refrigerate, and cold air is circulated in the equipment box body;

and S303, when the temperature in the equipment box body is detected to be reduced to a set value, the driving device drives the movable heat-insulation plate to release the air inlet and the air outlet.

Technical Field

The invention belongs to the field of low-temperature equipment, particularly relates to an air-cooled refrigerating workbench and refrigerating equipment used for the same, and further relates to a temperature stability control method for the air-cooled refrigerating workbench.

Background

Refrigeration benches have become widely used cryogenic equipment in research laboratories, commercial catering, and the like. The refrigerating station includes two types, direct cooling type and air cooling type, according to the refrigerating method. The direct cooling type refrigerating work table has a large volume of a box body, a poor refrigerating effect and frosting easily in a low-temperature storage box body, so that the air cooling type refrigerating work table is gradually popularized.

Air-cooled refrigerated benches typically include a cryogenic storage enclosure and refrigeration equipment. The refrigerating equipment comprises a refrigerating equipment box body and a refrigerating unit, and the refrigerating unit comprises an evaporator, a compressor, a condenser and the like. The cold energy generated by the refrigerating unit is conveyed into the low-temperature storage box body through the air outlet by wind power, and the cold air is circulated, conveyed back into the refrigerating equipment box body through the air inlet and cooled again.

the refrigeration equipment for the air-cooled refrigerating workbench on the market has a problem that the refrigeration effect of the evaporator is influenced by frosting during the long-time operation of the equipment. In order to solve the problem, most of the existing refrigeration equipment has an automatic defrosting function, and a defrosting heating wire is usually installed on an evaporator to heat and melt frost and discharge the frost from a drain pipe, so that a defrosting effect is achieved. In the defrosting process, the refrigeration equipment needs to be stopped, so that the cold in the low-temperature storage box body used in a matching way is leaked to the refrigeration equipment, and the temperature of the low-temperature storage box body is increased. In view of the above, the prior art (CN 205332642U) relates to a low-temperature defrosting structure of a surface-cooled evaporator of a-60 ℃ refrigerator, which teaches reversible closing of air inlets and air outlets by shutters during defrosting, but the evaporator is applied to a low-temperature refrigerator with a large installation volume, the air inlets and air outlets are located on opposite sides of the evaporator, and the refrigeration equipment of an air-cooled refrigeration workbench is required to have a compact structure (limited equipment installation space), and the air inlets and air outlets are located on the same side of the refrigeration equipment; in addition, the prior art employs a defrosting spray device, which does not generate additional heat during defrosting, and thus can achieve effective heat insulation using a louver, but such a structure is insufficient in heat insulation for defrosting apparatuses that additionally generate heat, such as a defrosting heater.

disclosure of Invention

In order to solve the problems in the prior art, an object of the present invention is to provide an improved refrigeration device, which is suitable for an air-cooled refrigeration workbench and has the advantages of small volume, good heat insulation performance, etc.

In the refrigeration equipment for the air-cooled refrigeration workbench, the wall surface of the equipment box body provided with the refrigeration unit is called as 'inner' and correspondingly called as 'outer' for the equipment box body of the refrigeration equipment; in a normal use state, the direction pointing to the ground or other placing platforms is called as 'down', and the direction opposite to the direction is 'up'; the walls that are perpendicular to the ground or other platform are referred to as "sidewalls".

particularly, this refrigeration plant for air-cooled refrigeration workstation includes equipment box and refrigerating unit, and this equipment box has a ventilation curb plate, and air intake and air outlet are seted up to this ventilation curb plate, and this refrigerating unit includes compressor, evaporimeter and installs the defrosting firing equipment on the evaporimeter, its characterized in that: the air inlet and the air outlet are reversibly sealed by the movable heat-insulation board under the driving of the driving device.

furthermore, the air inlet and the air outlet are respectively arranged above/below and below/above the ventilation side plate; the movable heat-preservation heat-insulation plate comprises a first movable heat-preservation heat-insulation plate and a second movable heat-preservation heat-insulation plate which are connected with the ventilation side plate in a sliding mode, and the first movable heat-preservation heat-insulation plate and the second movable heat-preservation heat-insulation plate are respectively used for reversibly sealing the air inlet and the air outlet.

Further, when the refrigeration equipment works for refrigeration, the first movable heat-insulation board and the second movable heat-insulation board are suspended between the air inlet and the air outlet in the vertical direction.

Furthermore, a plurality of sliding rods are arranged on the ventilation side plate, and the movable heat-preservation and heat-insulation plate is arranged on the sliding rods and moves up and down along the sliding rods.

Further, the movable heat-insulating board is driven by a screw system selected from a trapezoidal screw or a ball screw, preferably a trapezoidal screw.

Further, the refrigeration equipment also comprises a heat preservation and insulation material paved on the inner side and/or the outer side of the ventilation side plate, preferably paved on the inner side of the ventilation side plate.

Further, the thickness of the heat-insulating material is 5-35mm, preferably 8-20 mm.

Another object of the present invention is to provide an air-cooled refrigerating table using the refrigerating apparatus, which has a small temperature rise range during defrosting, reduces energy waste, and maintains the refrigeration quality of stored products.

Specifically, the air-cooled refrigerating workbench comprises a low-temperature storage box body and the refrigerating equipment, wherein the refrigerating equipment can regulate the temperature of the inner space of the low-temperature storage box body, preferably, an air inlet and an air outlet are communicated with the low-temperature storage box body, so that the temperature of the low-temperature storage box body can be regulated, and the communication mode can be realized in a conventional mode. Further preferably, the low-temperature storage box and the refrigeration equipment are respectively provided with temperature sensors for monitoring the temperature.

Further, in the air-cooled refrigerating workbench, the low-temperature storage box body and the refrigerating equipment are arranged side by side, and a ventilation side plate of the refrigerating equipment faces the low-temperature storage box body.

Another object of the present invention is to provide a control method for an air-cooled refrigerating workbench, which is used to operate the equipment, and can optimize the control flow of the equipment, thereby fully exerting the heat preservation and energy saving effects achieved by the improvement of the equipment related to the present invention.

Specifically, the control method of the air-cooled refrigeration workbench comprises the following steps:

S10, the air-cooled refrigeration workbench enters a defrosting mode, the compressor of the refrigerating unit stops, and the movable heat-preservation heat-insulation plate is driven by the driving device to seal the air inlet and the air outlet;

s20, the defrosting heating equipment starts to work, and after defrosting is finished, the defrosting heating equipment stops working;

S30, when or after the compressor is started, the movable heat-insulating board is driven by the driving device to release the air inlet and the air outlet.

further, the step S30 specifically includes:

S301, starting the compressor of the refrigerating unit, and keeping the movable heat-insulating plate closed to the air inlet and the air outlet;

s302, the refrigerating unit starts to refrigerate and enables cold air to circulate in the equipment box body;

And S303, when the temperature in the equipment box body is detected to be reduced to a set value, the driving device drives the movable heat-insulation plate to release the air inlet and the air outlet.

The invention has the beneficial effects that: an improved refrigeration apparatus is provided, particularly suitable for use with air-cooled refrigerated platforms. The refrigeration equipment has small volume and convenient installation, can be matched with the low-temperature storage box bodies of air-cooled refrigeration workbenches of various models for use, and has strong equipment universality. The refrigeration equipment adopts electric heating to defrost, has high defrosting speed and high efficiency, effectively prevents the cold energy of the low-temperature storage box body from dissipating and saves energy through the specially designed movable heat-preservation and heat-insulation board and heat-preservation and heat-insulation material. The invention further provides a control method matched with the equipment, so that the advantages of energy conservation, high efficiency and the like of the equipment can be fully exerted.

Drawings

Fig. 1 is a schematic view of an air-cooled freezer table of the prior art.

Fig. 2 is a front sectional view (shielding tuyere) of the refrigerating apparatus in one embodiment of the present invention.

FIG. 3 is a side view (without covering the tuyere) of the refrigerating apparatus in an embodiment of the present invention, and the direction of the arrow indicates the moving direction of the movable heat-insulating board.

Fig. 4 is a partially enlarged view of a portion C in fig. 2.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.