CN204987575U - Give birth to brightly in carrying cabinet refrigerating system - Google Patents

Abstract

The utility model discloses a refrigeration system for a fresh food self-lifting cabinet, which comprises a refrigeration device, a plurality of parallel refrigeration branches, and a temperature and pressure control device. In each cold room of the fresh self-lifting cabinet, the temperature and pressure control device is respectively connected to the refrigeration branch circuit and the refrigeration device, and the temperature and pressure control device controls the opening and closing of the refrigeration branch circuit and the start and stop of the refrigeration device. The fresh self-pick-up cabinet adopting the refrigeration system of the utility model can preset the temperature of each refrigerating room, and realize the freezing, cold storage and fresh-keeping of food through different degrees of refrigeration. The utility model enables the temperature of the refrigerating room to be independently controlled, and makes the utilization of the fresh food self-lifting cabinet more detailed and efficient.

Description

Refrigeration system of a fresh self-lifting cabinet

technical field

The utility model relates to the field of refrigeration, in particular to a refrigeration system for a fresh self-lifting cabinet.

Background technique

According to market demand, the fresh self-lifting cabinet needs to be able to provide different storage temperatures for storing fresh fruits and vegetables, seafood, fresh meat, cooked food, etc. Most of the current refrigeration products use vapor compression refrigeration. The simplest vapor-compression refrigeration system has only one refrigeration cycle, and the evaporators in each refrigerator are connected in series, which can only provide the same refrigeration temperature, which cannot meet the requirements for storing food diversity and reduces the efficiency of fresh self-pickup cabinets. .

Utility model content

In order to solve the deficiencies of the prior art, the utility model proposes a refrigeration system for self-lifting cabinets for fresh products whose temperature can be independently controlled in each refrigerating room.

The utility model adopts the following technical solutions:

A fresh food self-lifting cabinet refrigeration system, including a refrigeration device, a plurality of parallel refrigeration branch circuits, and a temperature and pressure control device. In each refrigerating room, the temperature and pressure control device is respectively connected to the refrigeration branch circuit and the refrigeration device, and the temperature and pressure control device controls the opening and closing of the refrigeration branch circuit and the start and stop of the refrigeration device.

Preferably, the refrigeration device includes a compressor, a condenser, an anti-dew pipe, and a dry filter connected in sequence, the dry filter is connected to the input end of the refrigeration branch, and the compressor is connected to the output end of the refrigeration branch through a liquid storage tank.

Preferably, the refrigeration branch circuit includes a solenoid valve, a throttle valve, and an evaporator connected in series in sequence, and the evaporator is arranged around the refrigerator compartment.

Preferably, the high-temperature and high-pressure gas compressed by the compressor is turned into a high-pressure liquid through the condenser, and then enters the refrigeration branches of each refrigerator after passing through the anti-dew pipe and the dry filter arranged at the mouth of the refrigerator;

In the refrigeration branch circuit, the high-pressure liquid passes through the solenoid valve, and then passes through the throttle valve to become a low-temperature and low-pressure liquid. After passing through the evaporator arranged around the refrigerator, it evaporates and absorbs heat to become a low-temperature and low-pressure gas, and the low-temperature and low-pressure gas passes through the liquid storage. The tank returns to the compressor to form a refrigeration cycle.

Preferably, the temperature and pressure control device includes a computer board, a temperature sensor installed in each cold room and a low pressure switch installed at the suction end of the compressor;

The computer board is connected to the temperature sensor and sets the operating temperature of the temperature sensor. When the temperature of the refrigerating room reaches the preset temperature, the temperature sensor transmits the temperature signal to the computer board. The computer board controls the solenoid valve corresponding to the cooling branch to close, and the corresponding cooling branch Refrigeration cycle stopped;

When each refrigerating room reaches the preset temperature, the solenoid valves in the refrigerating branch circuit are closed, the refrigerating cycle of the refrigeration system of the fresh self-lifting cabinet is stopped, and the return air pressure at the suction end of the compressor gradually decreases. When it reaches the limit value of the low-pressure pressure switch , the low pressure switch acts and the compressor stops;

As the temperature of the refrigerating room rises, the temperature sensor transmits the temperature signal to the computer board, and the computer board controls the solenoid valve corresponding to the refrigeration branch to be powered on and opened, the return air pressure at the suction end of the compressor rises, the low pressure switch operates, and the compressor starts. The refrigeration cycle starts again.

Preferably, a high-pressure switch is installed at the discharge end of the compressor. When the ambient temperature is too high and the discharge pressure of the compressor is higher than the set value of the high-pressure switch, the high-pressure switch is activated and the compressor is powered off.

The beneficial technical effect obtained by adopting the above technical scheme is:

The fresh self-pick-up cabinet adopting the refrigeration system of the utility model can preset the temperature of each refrigerating room, and realize the freezing, cold storage and fresh-keeping of food through different degrees of refrigeration. The utility model enables the temperature of the refrigerating room to be independently controlled, and makes the utilization of the fresh food self-lifting cabinet more detailed and efficient.

Description of drawings

Figure 1 is a fresh self-lifting cabinet refrigeration system.

In the figure, 1 compressor, 2 condenser, 3 anti-dew pipe, 4 dry filter, 5 solenoid valve, 6 throttle valve, 7 evaporator, 8 sensor, 9 liquid storage tank, 10 low pressure switch, 11 computer board , 12 high pressure pressure switch.

detailed description

The specific embodiment of the present utility model is further described in conjunction with accompanying drawing 1:

A fresh food self-lifting cabinet refrigeration system, including a refrigeration device, a plurality of parallel refrigeration branch circuits, and a temperature and pressure control device. In each refrigerating room, the temperature and pressure control device is respectively connected to the refrigeration branch circuit and the refrigeration device, and the temperature and pressure control device controls the opening and closing of the refrigeration branch circuit and the start and stop of the refrigeration device.

The refrigeration device includes a compressor 1, a condenser 2, an anti-dew pipe 3, and a dry filter 4 connected in sequence. The dry filter 4 is connected to the input end of the refrigeration branch, and the compressor 1 is connected to the output of the refrigeration branch through a liquid storage tank 9. end.

The liquid storage tank 9 regulates the flow rate of the refrigerant in the system, stores the liquid component of the refrigerant, and prevents liquid shock to the compressor.

The refrigeration branch circuit includes a solenoid valve 5, a throttle valve 6, and an evaporator 7 connected in series in sequence, and the evaporator 7 is arranged around the refrigerator compartment.

The high-temperature and high-pressure gas compressed by the compressor turns into high-pressure liquid through the condenser, and then enters the refrigeration branch of each refrigerator after passing through the anti-dew pipe and dry filter arranged at the mouth of the refrigerator; in the refrigeration branch, the high-pressure liquid Through the solenoid valve, and then through the throttle valve, it becomes a low-temperature and low-pressure liquid. Through the evaporator arranged around the refrigerator, it evaporates and absorbs heat to become a low-temperature and low-pressure gas. The low-temperature and low-pressure gas returns to the compressor through the liquid storage tank to form a refrigeration system. cycle.

The temperature and pressure control device comprises a computer board 11, a temperature sensor 8 installed in each cold room, a high-pressure pressure switch 12 installed at the discharge end of the compressor, and a low-pressure pressure switch 10 installed at the suction end of the compressor; the computer board is connected with the temperature sensor and Set the operating temperature of the temperature sensor.

When the ambient temperature is too high and the exhaust pressure of the compressor is higher than the set value of the high pressure switch, the high pressure switch will act, the contact will be disconnected, and the compressor will be powered off, which will protect the compressor.

As shown in Figure 1, four refrigerators are used as representatives, and of course it can be extended to more refrigerators.

When the temperature of the refrigerating chamber reaches the preset temperature, the temperature sensor transmits the temperature signal to the computer board, and the computer board controls the solenoid valve corresponding to the refrigeration branch to close, and the refrigeration cycle corresponding to the refrigeration branch stops.

When each refrigerating chamber reaches the preset temperature, the solenoid valves in the refrigeration branch circuit are all closed, the refrigeration cycle of the refrigeration system of the fresh self-lifting cabinet is stopped, the pressure of the return air end is gradually reduced, and the return air pressure of the suction end of the compressor is gradually reduced. When the limit value of the low pressure switch is reached, the low pressure switch will act and the compressor will stop.

As the temperature of the refrigerating room rises, the temperature sensor transmits the temperature signal to the computer board, and the computer board controls the solenoid valve corresponding to the refrigeration branch to be powered on and opened, the return air pressure at the suction end of the compressor rises, the low pressure switch operates, and the compressor starts. The refrigeration cycle starts again.

Of course, the above descriptions are only preferred embodiments of the present invention, and the present invention is not limited to the above-mentioned embodiments. It should be noted that any person skilled in the art can make all the Equivalent substitutions and obvious deformation forms all fall within the essential scope of this specification and should be protected by the utility model.

Claims (4)

1. A fresh self-lifting cabinet refrigeration system is characterized in that it includes a refrigeration device, a plurality of parallel refrigeration branches, and a temperature and pressure control device. The refrigeration device is connected to parallel refrigeration branches, and each refrigeration branch is respectively installed in In each refrigerating room of the fresh food self-lifting cabinet, the temperature and pressure control device is respectively connected to the refrigeration branch circuit and the refrigeration device, and the temperature and pressure control device controls the opening and closing of the refrigeration branch circuit and the start and stop of the refrigeration device. 2. A fresh self-lifting cabinet refrigeration system according to claim 1, characterized in that, the refrigeration device includes a compressor, a condenser, an anti-dew pipe, and a drying filter connected in sequence, and the drying filter is connected to the cooling system. The input end of the branch circuit, the compressor is connected to the output end of the refrigeration branch circuit through the liquid storage tank. 3. A fresh self-lifting cabinet refrigeration system according to claim 2, wherein the refrigeration branch circuit includes a solenoid valve, a throttle valve, and an evaporator connected in series, and the evaporator is arranged in the refrigerator compartment around. 4. A refrigeration system for fresh food self-lifting cabinets according to claim 3, characterized in that the high-temperature and high-pressure gas compressed by the compressor is turned into a high-pressure liquid through the condenser, and then passes through the anti-corrosion tank arranged at the mouth of the refrigerator room. The dew pipe and dry filter respectively enter the refrigeration branch of each refrigerator; In the refrigeration branch circuit, the high-pressure liquid passes through the solenoid valve, and then passes through the throttle valve to become a low-temperature and low-pressure liquid. After passing through the evaporator arranged around the refrigerator, it evaporates and absorbs heat to become a low-temperature and low-pressure gas, and the low-temperature and low-pressure gas passes through the liquid storage. The tank returns to the compressor to form a refrigeration cycle.