CN212610650U

CN212610650U - Low temperature incubator refrigerating system

Info

Publication number: CN212610650U
Application number: CN202020807448.5U
Authority: CN
Inventors: 王勇; 李乃臣
Original assignee: Xuneng Instrument Beijing Co ltd
Current assignee: Xuneng Instrument Beijing Co ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2021-02-26
Anticipated expiration: 2030-05-15

Abstract

The utility model discloses a low temperature incubator refrigerating system, including two evaporimeters, two way branches that evaporimeter one is connected are respectively: one path is that the first evaporator is connected with a compressor, a condenser, a liquid storage tank, a drying filter, a liquid viewing mirror, a first electromagnetic valve and a first expansion valve in sequence and returns to the first evaporator to form a refrigeration cycle, the other path is provided with a first capillary tube and a second electromagnetic valve, one end provided with the first capillary tube is connected between the first evaporator and the first expansion valve, and one end provided with the second electromagnetic valve is connected between the compressor and the condenser; the two-way structure of the evaporator II is the same as that of the evaporator I. The utility model changes the traditional need of controlling the temperature in the box body by starting and stopping the compressor, the compressor of the utility model is always in the working operation state, and the damage to the compressor caused by frequent starting is avoided; the double-evaporator design has the advantages that one evaporator is in a defrosting state while the other evaporator is in a defrosting state, so that the influence of defrosting of a single evaporator on the temperature in the box body is avoided.

Description

Low temperature incubator refrigerating system

Technical Field

The utility model relates to a refrigeration plant technical field specifically indicates a low temperature incubator refrigerating system.

Background

The refrigeration system is arranged in the low-temperature incubator such as plant stress culture, insect cultivation, bacterial microorganism culture and preservation, seed preservation and the like, and when the compressor of the refrigeration system (shown in figure 1) of the traditional low-temperature incubator runs, the temperature of the evaporator is always below zero, and the evaporator is easy to frost and freeze after long-term running. The refrigeration efficiency is reduced, and the temperature in the box body is out of control. Meanwhile, the evaporator is frosted and frozen to cause overhigh return air pressure in the refrigerating system and damage the compressor. When the evaporator is frosted or frozen, it needs to be defrosted. The traditional low-temperature incubator refrigeration system defrosts by stopping the operation of a compressor and naturally raising the temperature of an evaporator. Typically, the compressor is run for 2 hours, stopped for 5 minutes, defrosted and then started. Forced shutdown defrosting can cause the interior temperature of box to rise like this, can't guarantee the accuracy of the interior temperature of box. The low-temperature incubator refrigeration system needs to control the start and stop of the compressor so as to control the temperature in the box body under the condition of keeping the set temperature constant. Because the compressor operation is in high pressure state, frequently opening and stopping causes the compressor to damage easily.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is overcome above technical defect, provide a low temperature incubator refrigerating system, solve the problem that the evaporimeter frosted, freezes when long-term operation, solve the influence that the defrosting process led to the fact the box internal temperature, when guaranteeing the internal temperature stability of box, avoid the compressor as far as possible to frequently start.

In order to solve the technical problem, the utility model provides a technical scheme does: a low-temperature incubator refrigerating system comprises two evaporators, each evaporator adopts a double-path structure,

wherein, two routes that evaporimeter one is connected are respectively: one path is that the first evaporator is connected with a compressor, a condenser, a liquid storage tank, a drying filter, a liquid viewing mirror, a first electromagnetic valve and a first expansion valve in sequence and returns to the first evaporator to form a refrigeration cycle, the other path is provided with a first capillary tube and a second electromagnetic valve, one end provided with the first capillary tube is connected between the first evaporator and the first expansion valve, and one end provided with the second electromagnetic valve is connected between the compressor and the condenser;

two paths connected with the evaporator II are respectively as follows: one path is that the evaporator II is connected with a compressor, a condenser, a liquid storage tank, a drying filter, a liquid viewing mirror, a solenoid valve III and an expansion valve II in sequence and returns to the evaporator II to form a refrigeration cycle, the other path is provided with a capillary tube II and a solenoid valve IV, one end provided with the capillary tube II is connected between the evaporator II and the expansion valve II, and one end provided with the solenoid valve IV is connected between the compressor and the condenser.

Preferably, both evaporators are connected in series with a return air pressure regulating valve and an oil-gas separator and then with a compressor.

Compared with the prior art, the utility model the advantage lie in: the temperature in the box body is controlled by starting and stopping the compressor, so that the compressor is always in a working running state, and the damage to the compressor caused by frequent starting is avoided; 2 refrigerant passing paths of each evaporator are switched through electromagnetic valves, so that the purpose of controlling the temperature in the box body to be constant is achieved; the double-evaporator design has the advantages that one evaporator is in a defrosting state while the other evaporator is in a defrosting state, so that the influence of defrosting of a single evaporator on the temperature in the box body is avoided.

Drawings

FIG. 1 is a schematic view showing the construction of a conventional cryogenic incubator refrigeration system.

Fig. 2 is a schematic structural diagram of a low-temperature incubator refrigeration system of the present invention.

As shown in the figure: 1. the system comprises an evaporator 1.1, an evaporator I, an evaporator 1.2, an evaporator II, an evaporator 2, a compressor 3, a condenser 4, a drying filter 5, a capillary tube 5.1, a capillary tube I, a capillary tube 5.2, a capillary tube II, a capillary tube 6, an air return pressure regulating valve 7, an oil-gas separator 8, a liquid storage tank 9, a liquid viewing mirror 10.1, a solenoid valve I, a solenoid valve II, a solenoid valve 10.3, a solenoid valve III, a solenoid valve 10.4, a solenoid valve IV, a solenoid valve 10.1, an expansion valve I, an expansion valve 11.2 and an expansion valve II.

Detailed Description

The technical solution of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

With the attached drawing, the refrigeration system of the low-temperature incubator comprises two evaporators, each evaporator adopts a double-path structure,

wherein, two routes that evaporimeter 1.1 connects are respectively: one path is that an evaporator I1.1 is sequentially connected with an air return pressure regulating valve 6, an oil-gas separator 7, a compressor 2, a condenser 3, a liquid storage tank 8, a drying filter 4, a liquid sight glass 9, a solenoid valve I10.1 and an expansion valve I11.1, and returns to the evaporator I1.1 to form a refrigeration cycle, the other path is provided with a capillary tube I5.1 and a solenoid valve II 10.2, one end provided with the capillary tube I5.1 is connected between the evaporator I1.1 and the expansion valve I11.1, and one end provided with the solenoid valve II 10.2 is connected between the compressor 2 and the condenser 3;

two paths connected with the second evaporator 1.2 are respectively as follows: one path is that the evaporator II 1.2 is connected with the return air pressure regulating valve 6, the oil-gas separator 7, the compressor 2, the condenser 3, the liquid storage tank 8, the drying filter 4, the liquid sight glass 9, the electromagnetic valve III 10.3 and the expansion valve II 11.2 in sequence and returns to the evaporator II 1.2 to form a refrigeration cycle, the other path is provided with the capillary tube II 5.2 and the electromagnetic valve IV 10.4, one end provided with the capillary tube II 5.2 is connected between the evaporator II 1.2 and the expansion valve II 11.2, and one end provided with the electromagnetic valve IV 10.4 is connected between the compressor 2 and the condenser 3.

The utility model discloses adopt the design of double evaporation ware when concrete implementation, every evaporimeter all adopts the double-circuit design. The two evaporators are operated alternately, and an alternate time program can be set. When one evaporator is operating, the other evaporator is in a defrost state.

The working process of the first evaporator 1.1 is as follows: the compressor 2 charges the high-temperature and high-pressure refrigerant into the condenser 3, releases heat through the condenser 3, enters the liquid storage tank 8, and is filtered by the drying filter 4. The refrigerant enters an expansion valve through a first electromagnetic valve 10.1 by a liquid viewing mirror 9 (at the moment, a second electromagnetic valve 10.2 is in a closed state), enters an evaporator to boil and release cold energy, is limited by a return air pressure regulating valve 6, enters an oil-gas separator 7, returns to a compressor 2, and completes a refrigeration cycle. When the set temperature is reached, the first electromagnetic valve 10.1 is closed, the second electromagnetic valve 10.2 is opened, and the hot fluorine passes through the first evaporator 1.1 to defrost the first evaporator 1.1.

When the first evaporator 1.1 works, the second evaporator 1.2 is in a defrosting state, the third electromagnetic valve 10.3 of the second evaporator 1.2 is controlled to be in a closed state, and the fourth electromagnetic valve 10.4 is in an intermittent opening state. The other path of refrigerant from the compressor 2 passes through a fourth electromagnetic valve 10.4, passes through a second capillary tube 5.2, enters a second evaporator 1.2, is defrosted by hot fluorine for the second evaporator 1.2, passes through a return air pressure regulating valve 6, and enters the compressor 2 through an oil-gas separator 7 to complete a defrosting cycle. When the temperature of the second evaporator 1.2 reaches the set defrosting temperature, the fourth electromagnetic valve 10.4 is closed. On the contrary, when the second evaporator 1.2 works, the first evaporator 1.1 is in a defrosting state. The refrigerant is cooled through the condenser 3 and then is discharged into the evaporator to emit cold; the refrigerant is not cooled by the condenser 3, the temperature is hot, and the refrigerant is also a hot refrigerant in the evaporator, namely, hot fluorine.

The present invention and the embodiments thereof have been described above, but the description is not limited thereto, and the embodiment shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should understand that they should not be limited to the embodiments described above, and that they can design the similar structure and embodiments without departing from the spirit of the invention.

Claims

1. The utility model provides a low temperature incubator refrigerating system which characterized in that: comprises two evaporators, each evaporator adopts a double-path structure,

2. The cryogenic incubator refrigeration system of claim 1, wherein: the two evaporators are sequentially connected with a return air pressure regulating valve and an oil-gas separator and then connected with a compressor.