CN115200282B

CN115200282B - Check cabinet

Info

Publication number: CN115200282B
Application number: CN202210732549.4A
Authority: CN
Inventors: 薛强; 苏功兵; 陈立博; 王长征; 王致家; 刘巍; 朱光祖
Original assignee: Qingdao Aucma Cold Chain Integration Co Ltd
Current assignee: Qingdao Aucma Cold Chain Integration Co Ltd
Priority date: 2022-06-27
Filing date: 2022-06-27
Publication date: 2023-11-03
Anticipated expiration: 2042-06-27
Also published as: CN115200282A

Abstract

The utility model relates to the technical field of check cabinets, in particular to a check cabinet with a refrigerating function, which comprises a cabinet body, a controller arranged at the top of the cabinet body and a double-compressor refrigerating system controlled by the controller to operate. Two sides of the cabinet body are respectively provided with a storage chamber, and an uplink air channel is arranged between the storage chambers. An evaporator is arranged on the inner bottom wall of the uplink air duct, and an evaporation fan is arranged above the evaporator. A plurality of storage grids are arranged in the storage chamber from top to bottom in a layered mode, and ventilation openings are formed in a top plate of each storage grid and a side plate close to one side of the uplink air duct. The storage grids and the storage grids are communicated with the uplink air duct through ventilation openings. The refrigerating system disclosed by the utility model not only saves energy and reduces noise, but also optimizes the design of the air duct, and effectively improves the temperature uniformity in the cabinet.

Description

Check cabinet

Technical Field

The utility model relates to the technical field of check cabinets, in particular to a check cabinet with a refrigerating function.

Background

With the continuous acceleration of global economic integration process, trade barriers among countries are continuously eliminated, international trade and domestic trade activities are increasingly active, and production, management and social activities tend to be efficient and fast-paced, so that time value is more and more important. The express logistics industry which accompanies the development is vigorous.

In order to improve the terminal distribution efficiency and solve the problem that time nodes of couriers and consumers are asymmetric, check boxes such as intelligent express cabinets, takeaway cabinets and automatic sales cabinets are gradually becoming the main delivery mode of the express delivery of the last kilometer. Currently, most of ubiquitous check cabinets are normal temperature cabinets, and have no refrigeration function. Therefore, the fresh food can only stop the step of the cabinet, and other foods stored in the cabinet need to be taken out in time, otherwise, the food is easy to deteriorate due to high temperature. In order to extend the shelf life of the stored food in the checks, and to meet the preservation requirements of various foods, it is highly desirable to provide the checks with a refrigeration function.

Chinese patent specification CN204739828U discloses a lattice cabinet liner, which is divided into a plurality of rows of transversely penetrating storage compartments, an air duct is arranged between any two adjacent rows of storage compartments, two inner side walls of each storage compartment are provided with an air inlet and a corresponding air outlet which are communicated with the air duct, and the bottom of the liner is provided with a fan communicated with the air duct and a heater or refrigerator arranged above the fan. On one hand, the cool air is downwards settled, and only a fan is arranged below the temperature control device to blow upwards, so that the temperature of the upper space and the lower space of the inner container of the lattice cabinet is uneven; on the other hand, only the two side walls of the storage compartment are provided with an air inlet and an air outlet, so that air between the storage compartments arranged side by side up and down is not circulated. Thus, the temperature within each storage compartment and each storage compartment is not uniform, which is detrimental to food preservation.

Disclosure of Invention

The utility model aims to provide a check cabinet, which effectively solves the problem of poor temperature uniformity in the check cabinet with a refrigerating function.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a check cupboard, includes the cabinet body and locates the controller at cabinet body top, still includes the dual compressor cooling system who is controlled the operation by the controller, dual compressor cooling system includes first compressor, second compressor, condenser and evaporimeter, the condenser is equipped with two inlet ends, is connected with the blast pipe of first compressor and the blast pipe of second compressor respectively, the evaporimeter is equipped with two outlet ends, is connected with the muffler of first compressor and the muffler of second compressor respectively.

The first compressor, the second compressor and the condenser are arranged at the top of the cabinet body.

Two sides of the cabinet body are respectively provided with a storage chamber, and an uplink air channel is arranged between the storage chambers.

The air conditioner is characterized in that a temperature sensor electrically connected with the controller, the evaporator fixed on the inner bottom wall of the air conditioner and an evaporation fan positioned above the evaporator are arranged in the air conditioner.

The storage compartment is internally provided with a plurality of storage grids which are arranged from top to bottom in a layered mode, ventilation openings are formed in a top plate of each storage grid and a side plate close to one side of the uplink air channel, and the storage grids are mutually communicated with the uplink air channel through the ventilation openings.

Further, the temperature sensor comprises an indoor temperature sensor and a defrosting temperature sensor, wherein the indoor temperature sensor is suspended at the upper part of the uplink air duct, and the defrosting temperature sensor is suspended at the upper part of the evaporator.

Further, the exhaust pipes of the first compressor and the second compressor are respectively connected with an electromagnetic valve electrically connected with the controller, the electromagnetic valves are connected with the air inlet end of the condenser, the exhaust pipe of the compressor and the defrosting heat supply pipe through three-way pipe branches, and the other end of the defrosting heat supply pipe is connected with the air inlet end of the evaporator.

Further, a heating wire is arranged at the inner top end of the uplink air duct, and the heating wire is electrically connected with the controller.

Further, the storage grid and the uplink air duct are respectively provided with a foaming door for opening and closing the corresponding opening.

Further, a display screen for receiving signals is embedded in the foaming door of the uplink air duct, the display screen is in communication connection with the controller, and the display screen transmits the received signals to the controller.

Further, the four included angles of the outer bottom wall of the cabinet body are respectively provided with feet.

Further, the uplink air duct is located at the middle position of the cabinet body.

The beneficial effects of the utility model are as follows:

(1) Through using two compressor refrigerating system, with the same evaporimeter of each independent connection of two small displacement's compressors and same condenser, through two compressors double entry double outlet, guarantee refrigeration temperature, and then effectively reduce refrigerating system running noise, practice thrift the energy consumption.

(2) Through optimizing the wind channel design, set up the wind channel that goes up between the storing room, be fixed in the evaporimeter on the interior diapire in wind channel that goes up, all be equipped with the vent on the roof of each storing check and the curb plate that is close to wind channel one side that goes up, realize that the air conditioning circulates in wind channel left and right sides, improved the temperature homogeneity in the cabinet, make the temperature difference not more than 2 ℃ about the cabinet.

(3) The electromagnetic valve is additionally arranged on the exhaust pipe of the compressor and is connected with the air inlet end of the condenser, the exhaust pipe of the compressor and the defrosting heat supply pipe through three-way pipe branches, and the other end of the defrosting heat supply pipe is connected with the air inlet end of the evaporator. When the evaporator needs defrosting, the electromagnetic valve is opened, hot gas exhausted by the compressor is directly connected to the evaporator through the heat supply pipe, so that the hot defrosting is realized, and compared with defrosting by the heating wire, the evaporator is beneficial to saving energy consumption.

(4) Through the interior top installation heater strip in ascending wind channel, when the temperature was too low in the cabinet, through self-heating function, can effectively ensure the required temperature in the cabinet, realize that when outdoor ambient temperature in winter is less than 0 ℃, still can guarantee cold-stored temperature in the cabinet.

Drawings

The utility model will be described in detail below with reference to the drawings and the detailed description.

Figure 1 is a front view of the inventive grid cabinet.

Fig. 2 is a top view of the internal structure of the lamp box in fig. 1.

Fig. 3 is a perspective view of the internal structure of the cabinet of fig. 1 (the top plate of each storage compartment in the right side storage compartment is omitted) (wherein the arrows indicate the air flow direction).

Fig. 4 is an indication diagram of the refrigeration cycle and hot gas defrost lines of the dual compressor refrigeration system of the present utility model.

Detailed Description

As shown in fig. 1-3, a check cabinet comprises a cabinet body 1, a controller 2 arranged at the top of the cabinet body, a temperature sensor electrically connected with the controller 2, and a double-compressor refrigerating system controlled to operate by the controller 2.

The dual compressor refrigeration system comprises a first compressor 31, a second compressor 32, a condenser 4 and an evaporator 5, as shown in fig. 4, the condenser 4 is provided with two air inlet ends, which are respectively connected with an exhaust pipe of the first compressor 31 and an exhaust pipe of the second compressor 32, and the evaporator 5 is provided with two air outlet ends, which are respectively connected with an air return pipe of the first compressor 31 and an air return pipe of the second compressor 32. The first compressor 31 and the second compressor 32 are each independently connected to the same condenser 4 and the same evaporator 5. I.e. the first compressor 31 and the second compressor 32 are operated independently of each other. Under the control of the controller 2, the first compressor 31 and the second compressor 32 are double-in and double-out, so that the stable operation of the refrigerating system is ensured. According to the needs of users, the double-compressor refrigeration system of the embodiment can perform the conversion of refrigeration or freezing functions. The specific connection mode of the double-compressor refrigerating system can be realized by adopting the prior art. The first compressor 31 and the second compressor 32 in this embodiment can achieve or even exceed the working effect of a single large-displacement compressor by selecting small-displacement compressors, thereby achieving the purposes of energy conservation and noise reduction.

As shown in fig. 1 and 2, the controller 2, the first compressor 31, the second compressor 32 and the condenser 4 are arranged at the top of the cabinet 1, preferably, an openable and closable lamp box 6 is arranged at the top of the cabinet 1, and the controller 2, the first compressor 31, the second compressor 32 and the condenser 4 are arranged in the lamp box 6.

As shown in fig. 3, the cabinet body 1 is sequentially provided with three chambers from left to right, and each chamber comprises a storage chamber 7 positioned at two sides of the cabinet body and an uplink air duct 8 positioned between the storage chambers. Preferably, the upstream air duct 8 is located at the middle position of the cabinet body 1. A temperature sensor, an evaporator 5 fixed on the inner bottom wall of the uplink air duct 8 and an evaporation fan 6 arranged above the evaporator 5 are arranged in the uplink air duct 8. The evaporation fan 6 can suck cool air at the bottom in the upstream air duct 8 to the top, thereby promoting the circulation of the internal air.

As shown in fig. 3, the storage chamber 7 is provided with a plurality of storage compartments 9 arranged in layers from top to bottom, and each layer of each storage chamber has only one storage compartment 9. The volume of the storage compartment 9 can be designed according to actual requirements, and in this embodiment, the volume of the storage compartment 9 gradually increases from top to bottom. A top plate ventilation opening 11 is arranged on the top plate 10 of each storage grid 9, and a side plate ventilation opening 13 is arranged on the side plate 12 of each storage grid 9, which is close to one side of the uplink air duct 8. Preferably, the top plate ventilation openings 11 between the storage compartments 9 in each storage chamber 7 are arranged opposite to each other. The storage grids 9 and the upward air duct 8 are communicated with each other through a top plate ventilation opening 11 and a side plate ventilation opening 13. The sizes of the top plate ventilation openings 11 and the side plate ventilation openings 13 can be designed according to actual requirements. The evaporation fan 6 sucks air, sucks cold air around the evaporator 5 from bottom to top, after the cold air reaches the top of the uplink air duct 8, the cold air sinks, the cold air enters the storage grid 9 through the side plate ventilation openings 13, flows downwards through the top plate ventilation openings 11 of the adjacent storage grids 9, and finally returns to the bottom of the evaporator 5. The temperature uniformity in the cabinet is improved by circulating the cold air at the left side and the right side of the upstream air duct 8, so that the temperature difference between the upper side and the lower side in the cabinet is not more than 2 ℃.

Further, the temperature sensors include an indoor temperature sensor 15 and a defrosting temperature sensor 14. The indoor temperature sensor 15 is suspended at the upper part of the uplink air duct 8, can detect the temperature in the cabinet in real time, transmits the temperature value to the controller 2, and controls the operation of the double-compressor refrigerating system by the controller 2, so that the stability of the temperature in the cabinet is ensured. The defrosting temperature sensor 14 is arranged at the upper part of the evaporator 5 in a suspending way, monitors the frosting condition of the surface of the evaporator 5 in real time, transmits the detected temperature value to the controller 2, and controls the starting or closing of the thermal defrosting function by the controller 2.

Referring to fig. 4, specifically, in order to realize the thermal defrosting function, the exhaust pipes of the first compressor 31 and the second compressor 32 are connected with electromagnetic valves 16 electrically connected with the controller 2, the electromagnetic valves 16 are connected with the air inlet end of the condenser 4, the exhaust pipes of the compressors 31 and 32 and the defrosting heat supply pipe 19 through three-way pipe branches, and the other end of the defrosting heat supply pipe 19 is connected with the air inlet end of the evaporator 5. When the hot defrosting function needs to be started, the controller 2 controls the electromagnetic valve 16 to be opened, at the moment, a conventional refrigeration cycle pipeline is closed, a hot defrosting pipeline is opened, and hot air discharged by the two compressors is directly connected to the evaporator 5 through the heat supply pipe, so that hot defrosting is realized; when the defrosting temperature sensor 14 senses that defrosting is finished, a signal is transmitted to the controller 2, the electromagnetic valve 16 is controlled by the controller 2 to be closed, at the moment, a hot gas defrosting pipeline is closed, a conventional refrigeration cycle pipeline is opened, and hot gas discharged by two compressors enters the condenser 4 to restart the refrigeration cycle. According to the embodiment, the hot air exhausted by the compressor is utilized for defrosting, compared with the conventional heating wire which is used for defrosting independently, the problem of high defrosting power of the heating wire can be solved, and energy conservation and consumption reduction are realized.

Further, when the outdoor temperature in winter can meet the refrigerating temperature while the inside of the cabinet is in the refrigerating mode, the compressor stops operating, and at this time, the temperature inside the cabinet is the same as the outdoor temperature. When the outdoor temperature is lower than the refrigerating temperature set value, in order to realize the refrigerating temperature in the check cabinet, preferably, a heating wire 17 is installed at the inner top end of the upstream air duct 8, and the heating wire 17 is electrically connected with the controller 2. When the temperature in the cabinet detected by the indoor temperature sensor 15 is lower than the set value of the refrigerating temperature, the controller 2 controls the heating wire 17 to start heating, so that the refrigerating temperature in the grid cabinet is ensured.

Since the check cabinet of the present embodiment has a refrigerating function, it is preferable that the storage check 9 and the upstream air duct 8 are provided with foaming doors for opening and closing the corresponding openings. Further, for convenience of use, a display screen 18 for receiving user signals is embedded in the foam door of the uplink air duct 8, the display screen 18 is in communication connection with the controller 2, the display screen 18 transmits the received signals to the controller 2, and then the controller 2 controls corresponding components to achieve corresponding functions. In addition, feet are arranged at four included angles of the outer bottom wall of the check cabinet body 1, preferably, the feet are casters 20 with supporting feet, when the check cabinet needs to move, the supporting feet are retracted, and the casters 20 land, so that the check cabinet can be conveniently pushed; when the grid reaches the specified position, the support feet are grounded and the casters 20 are lifted off the ground, thereby ensuring the stability of the grid. When the grid cabinet needs to be placed outdoors, preferably, a foot reinforcing body 21 is additionally arranged on the supporting leg of the caster 20, and the foot reinforcing body 21 is fixed on the ground through the expansion bolts, so that the stability of the grid cabinet is further ensured, and the grid cabinet is prevented from being blown down by strong wind.

The check cabinet of the embodiment is put into a laboratory for electrifying, the refrigerating mode is adjusted to be refrigerating, ice cream, boiled dumplings and mutton rolls are respectively put into each layer of storage check 9, temperature detection distribution points in the cabinet, ambient temperature detection distribution points, temperature detection distribution points of the evaporator 5 and product running noise detection are respectively carried out, and experimental results show that the running noise of the double-compressor refrigerating system of the check cabinet of the embodiment is far lower than that of a single-compressor refrigerating system. And then taking out the articles, replacing the articles with vegetables, regulating the refrigeration mode to refrigeration, checking the measurement results of all the temperature detection points in the cabinet, finding that the temperature difference of all the temperature detection points is smaller, and ensuring that the temperature difference in the cabinet is not more than 2 ℃ and reaches a balance point with a certain proportion. Further, the hot air defrosting function is started, and the temperature rise of the evaporator 5 is checked, so that hot air defrosting is effective. Finally, the laboratory ambient temperature is reduced to-20 ℃, the temperature in the cabinet of the grid cabinet is set to be the refrigeration temperature of 10 ℃, the heating wire 17 is started, and after a certain time, the temperature of the distribution point in the cabinet is checked to reach the set temperature.

Parts not described in the present utility model can be realized by adopting or referring to the prior art.

It should be understood that the above description is not intended to limit the utility model to the particular embodiments disclosed, but to limit the utility model to the particular embodiments disclosed, and that the utility model is not limited to the particular embodiments disclosed, but is intended to cover modifications, adaptations, additions and alternatives falling within the spirit and scope of the utility model.

Claims

1. A check cabinet comprises a cabinet body and a controller arranged at the top of the cabinet body, and is characterized in that,

the double-compressor refrigeration system comprises a first compressor, a second compressor, a condenser and an evaporator, wherein the condenser is provided with two air inlet ends which are respectively connected with an exhaust pipe of the first compressor and an exhaust pipe of the second compressor, and the evaporator is provided with two air outlet ends which are respectively connected with an air return pipe of the first compressor and an air return pipe of the second compressor;

the first compressor, the second compressor and the condenser are arranged at the top of the cabinet body;

two sides of the cabinet body are respectively provided with a storage chamber, and an uplink air channel is arranged between the storage chambers;

the temperature sensor electrically connected with the controller, the evaporator fixed on the inner bottom wall of the upstream air duct and the evaporation fan positioned above the evaporator are arranged in the upstream air duct;

the storage chambers are internally provided with a plurality of storage grids which are arranged in a layered manner from top to bottom, the volumes of the storage grids are gradually increased from top to bottom, ventilation openings are formed in the top plate of the storage grid and the side plate which is close to one side of the uplink air duct, and the storage grids are communicated with each other through the ventilation openings;

the uplink air duct is positioned in the middle of the cabinet body;

the temperature sensor comprises an indoor temperature sensor and a defrosting temperature sensor, the indoor temperature sensor is arranged at the upper part of the uplink air duct in a suspending manner, and the defrosting temperature sensor is arranged at the upper part of the evaporator in a suspending manner;

the exhaust pipes of the first compressor and the second compressor are respectively connected with an electromagnetic valve electrically connected with the controller, the electromagnetic valves are connected with the air inlet end of the condenser, the exhaust pipe of the compressor and the defrosting heat supply pipe through three-way pipe branches, and the other end of the defrosting heat supply pipe is connected with the air inlet end of the evaporator;

a heating wire is arranged at the inner top end of the uplink air duct and is electrically connected with a controller;

and the storage grid and the uplink air duct are respectively provided with a foaming door for opening and closing the corresponding opening.

2. A grid cabinet according to claim 1, wherein a display screen for receiving signals is embedded in the foam door of the up-going air duct, the display screen being in communication with the controller, the display screen transmitting the received signals to the controller.

3. A grid cabinet according to claim 1, wherein feet are provided at four angles to the outer bottom wall of the cabinet.