阅读说明：本技术 一种由co2辅助制冷设备和二元复叠制冷系统共同使用的超低温冰箱 (By CO2Ultra-low temperature refrigerator jointly used by auxiliary refrigeration equipment and binary cascade refrigeration system ) 是由 刘发柱 庞皓文 王福滋 苏嵋华 孙晓雪 于 2020-04-28 设计创作，主要内容包括：本发明提供一种由CO<Sub>2</Sub>辅助制冷设备和二元复叠制冷系统共同使用的超低温冰箱。本发明包括：超低温冰箱本体,所述超低温冰箱本体内设有用于为冰箱内部制冷的二元复叠制冷系统,还包括CO<Sub>2</Sub>辅助制冷设备,所述CO<Sub>2</Sub>辅助制冷设备的输出端伸入超低温冰箱本体内部,其用于在接收到冰箱门已处于闭合状态且冰箱本体内部温度高于预设值的CO<Sub>2</Sub>辅助制冷信号后,向冰箱本体内部喷射预设量的CO<Sub>2</Sub>气体。本发明采用CO<Sub>2</Sub>辅助制冷设备可实现超低温冰箱初次使用快速降温,明显改善由于冰箱开门或大容量存储造成的超低温冰箱回温速度较慢的问题。同时,采用CO<Sub>2</Sub>辅助制冷设备可实现在断电后一定时间内保持内部温度仍处于低温状态,保证冰箱样本的安全性。(The invention provides a catalyst prepared from CO 2 The ultra-low temperature refrigerator is used by the auxiliary refrigeration equipment and the binary cascade refrigeration system together. The invention comprises the following steps: the ultra-low temperature refrigerator comprises an ultra-low temperature refrigerator body, wherein a binary overlapping refrigerating system for refrigerating the interior of the refrigerator is arranged in the ultra-low temperature refrigerator body, and the ultra-low temperature refrigerator body further comprises CO 2 Auxiliary refrigeration equipment, said CO 2 The output end of the auxiliary refrigeration equipment extends into the ultra-low temperature refrigerator body and is used for receiving CO of which the refrigerator door is in a closed state and the temperature in the refrigerator body is higher than a preset value 2 Auxiliary refrigerationAfter the signal, spraying CO with preset quantity into the refrigerator body 2 A gas. The invention adopts CO 2 The auxiliary refrigeration equipment can realize the rapid cooling of the ultra-low temperature refrigerator in the first use, and obviously improve the problem of low temperature return speed of the ultra-low temperature refrigerator caused by the opening of the refrigerator or large-capacity storage. At the same time, CO is used 2 The auxiliary refrigeration equipment can keep the internal temperature in a low-temperature state within a certain time after power failure, and the safety of a refrigerator sample is ensured.)

1. By CO₂The ultra-low temperature refrigerator comprises an ultra-low temperature refrigerator body, wherein the ultra-low temperature refrigerator body is internally provided with a binary cascade refrigeration system for refrigerating the inside of the refrigerator, and the ultra-low temperature refrigerator is characterized by further comprising CO₂Auxiliary refrigeration equipment, said CO₂The output end of the auxiliary refrigeration equipment extends into the ultra-low temperature refrigerator body and is used for receiving CO of which the refrigerator door is in a closed state and the temperature in the refrigerator body is higher than a preset value₂After the auxiliary refrigeration signal, spraying a preset amount of CO into the refrigerator body₂A gas.

2. The super set of claim 1A cryogenic refrigerator, characterized in that said CO₂The auxiliary refrigerating equipment comprises CO₂Steel cylinder, low-temperature distribution pipe, electromagnetic valve, electric cabinet, injection pipe and CO₂Nozzle of said CO₂The output end of the steel cylinder is connected with an injection pipe through a low-temperature adapter, the electromagnetic valve is arranged between the output end of the steel cylinder and the injection pipe, and the output end of the injection pipe is connected with CO₂The nozzle is connected with the electric control box, and the electric control box is used for receiving the CO₂After the auxiliary refrigeration signal, the control electromagnetic valve is in an opening position.

3. The ultra-low temperature refrigerator of claim 2, wherein the electric cabinet is further used for receiving a CO stopping state that the refrigerator door is closed and the temperature inside the refrigerator body is lower than a preset value₂After the auxiliary refrigeration signal, the electromagnetic valve is controlled to be in a closed position, and the binary cascade refrigeration system is started at the same time.

4. The ultra-low temperature refrigerator according to any one of claims 1 to 3, wherein the ultra-low temperature refrigerator body comprises an inner door and an outer door, the outer door is provided with a door opening sensor for detecting whether the outer door is in an opened or closed state, the inner door is used as the interior of the ultra-low temperature refrigerator body, and the refrigerator is provided with a temperature sensor for detecting the temperature of the interior of the refrigerator body.

5. The ultra-low temperature refrigerator as claimed in claim 1, wherein the binary cascade refrigeration system comprises a high temperature stage refrigeration system and a low temperature stage refrigeration system which are connected with each other, the high temperature stage refrigeration system comprises a high temperature stage compressor, a condenser, a high temperature stage capillary tube and an evaporative condenser which are connected in sequence, and one output end of the evaporative condenser is connected with the high temperature stage compressor to form a closed loop;

the low-temperature-stage refrigeration system comprises a low-temperature-stage compressor, an evaporative condenser, a low-temperature-stage capillary tube and an evaporator which are sequentially connected, wherein one output end of the evaporative condenser is connected with the low-temperature-stage compressor to form a closed loop.

Technical Field

The invention relates to the technical field of ultra-low temperature refrigerators, in particular to an ultra-low temperature refrigerator commonly used by CO2 auxiliary refrigeration equipment and a binary cascade refrigeration system.

Background

The ultra-low temperature refrigerator is mainly used in the fields of national defense, medical treatment and scientific research. With the increasing rise of life science and biological genetic engineering, the demand of ultra-low temperature refrigerator products is on the trend of rising year by year. The ultra-low temperature refrigerator in the fields of life science and biological gene engineering can store sperms, ova, ES cells and the like. The time from the environment temperature to the ultra-low temperature environment in the cabinet of the common ultra-low temperature refrigerator is longer, and when the load in the opening and closing refrigerator door or the cabinet is larger, the temperature in the cabinet can be recovered to the ultra-low temperature environment for a longer time. Meanwhile, under the condition of power failure of a common ultralow-temperature refrigerator, the temperature in the refrigerator rises rapidly, so that the safety of a refrigerator sample cannot be guaranteed, and the internal biological sample is easily damaged.

Disclosure of Invention

In accordance with the technical problems set forth above, an ultra-low temperature refrigerator for use with a CO2 auxiliary cooling device and a binary cascade cooling system is provided. The technical means adopted by the invention are as follows:

by CO₂The ultra-low temperature refrigerator comprises an ultra-low temperature refrigerator body, wherein the ultra-low temperature refrigerator body is internally provided with a binary cascade refrigeration system for refrigerating the inside of the refrigerator and also comprises CO₂Auxiliary refrigeration equipment, said CO₂The output end of the auxiliary refrigeration equipment extends into the ultra-low temperature refrigerator body and is used for receiving CO of which the refrigerator door is in a closed state and the temperature in the refrigerator body is higher than a preset value₂After the auxiliary refrigeration signal, spraying a preset amount of CO into the refrigerator body₂A gas.

Further, the CO is₂The auxiliary refrigerating equipment comprises CO₂Steel cylinder, low-temperature distribution pipe, electromagnetic valve, electric cabinet, injection pipe and CO₂Nozzle of said CO₂The output end of the steel cylinder is connected with an injection pipe through a low-temperature adapter, the electromagnetic valve is arranged between the output end of the steel cylinder and the injection pipe, and the output end of the injection pipe is connected with CO₂The nozzle is connected with the electric control box, and the electric control box is used for receiving the CO₂After the auxiliary refrigeration signal, the control electromagnetic valve is in an opening position.

Further, the ultra-low temperature refrigerator body includes interior door and outer door, the outer door is equipped with and is used for detecting the door opening sensor that the outer door is in opening or closed state, interior door inside is as inside the ultra-low temperature refrigerator body, the inside temperature sensor who is used for detecting the inside temperature of refrigerator body that is equipped with of refrigerator.

Further, the electric cabinet is also used for receiving the CO stopping state that the refrigerator door is in a closed state and the temperature inside the refrigerator body is lower than a preset value₂After the auxiliary refrigeration signal, the electromagnetic valve is controlled to be in a closed position, and the binary cascade refrigeration system is started at the same time.

Further, the binary cascade refrigeration system comprises a high-temperature-stage refrigeration system and a low-temperature-stage refrigeration system which are connected with each other, the high-temperature-stage refrigeration system comprises a high-temperature-stage compressor, a condenser, a high-temperature-stage capillary tube and an evaporative condenser which are sequentially connected, and one output end of the evaporative condenser is connected with the high-temperature-stage compressor to form a closed loop;

the low-temperature-stage refrigeration system comprises a low-temperature-stage compressor, an evaporative condenser, a low-temperature-stage capillary tube and an evaporator which are sequentially connected, wherein one output end of the evaporative condenser is connected with the low-temperature-stage compressor to form a closed loop.

The invention has the following advantages:

1. by using CO₂The auxiliary refrigeration equipment can realize the rapid cooling of the ultra-low temperature refrigerator in the first use, and obviously improve the problem of low temperature return speed of the ultra-low temperature refrigerator caused by the opening of the refrigerator or large-capacity storage.

2. By using CO₂The auxiliary refrigeration equipment can keep the internal temperature in a low-temperature state within a certain time after power failure, and the safety of a refrigerator sample is ensured.

3、CO₂The GWP is 1, the ODP is 0, the composition is safe, non-toxic, non-combustible, cheap and easily available, the greenhouse effect is greatly relieved, and the environmental protection advantage is obvious

For the above reasons, the present invention can be widely popularized in the technical field of ultra-low temperature refrigerators,

drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a binary cascade refrigeration system in an embodiment of the invention.

FIG. 2 shows an embodiment of the ultra-low temperature refrigerator body and CO₂The structure of the auxiliary refrigeration equipment is schematic.

In the figure: 1. a high temperature compressor; 2. a condenser; 3. a high temperature stage capillary; 4. an evaporative condenser; 5. A cryogenic compressor; 6. a low temperature stage capillary; 7. an evaporator; 8. CO2₂A special steel cylinder; 9. an ultra-low temperature refrigerator body; 10. an electromagnetic valve; 11. an injection pipe; 12. an air inlet; 13. a low temperature fitting pipe; 14. an electric cabinet.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments 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.

The embodiment discloses a CO synthesis method₂The ultra-low temperature refrigerator with the auxiliary refrigeration equipment and the binary overlapping refrigeration system used together comprises an ultra-low temperature refrigerator body 9, wherein the ultra-low temperature refrigerator body is internally provided with the binary overlapping refrigeration system used for refrigerating the inside of the refrigerator, and the ultra-low temperature refrigerator further comprises CO₂Auxiliary refrigeration equipment, said CO₂The output end of the auxiliary refrigeration equipment extends into the ultra-low temperature refrigerator body through the air inlet 12 and is used for receiving CO when the refrigerator door is in a closed state and the temperature in the refrigerator body is higher than a preset value₂After the auxiliary refrigeration signal, spraying a preset amount of CO into the refrigerator body₂In this embodiment, the test hole reserved in the refrigerator can be selected as the air inlet hole.

As shown in FIG. 2, the CO₂The auxiliary refrigerating equipment comprises CO₂Steel cylinder 8, low-temperature adapter pipe 13, electromagnetic valve 10, electric cabinet 14, injection pipe 11 and CO₂Nozzle of said CO₂The output end of the steel cylinder is connected with an injection pipe through a low-temperature adapter, the electromagnetic valve is arranged between the output end of the steel cylinder and the injection pipe, and the output end of the injection pipe is connected with CO₂The nozzle is connected with the electric control box, and the electric control box is used for receiving the CO₂After the auxiliary refrigeration signal, the electromagnetic valve is controlled to be in an open position, and CO is used₂The outlet valve of the steel cylinder is in a normally open state, in this embodiment, CO₂The pressure of the steel cylinder is 60-70 kg.

The ultra-low temperature refrigerator body includes interior door and outer door, the outer door is equipped with and is used for detecting the outer door and is in the door opening sensor who opens or closed state, interior door inside is as inside the ultra-low temperature refrigerator body, the inside temperature sensor who is used for detecting the inside temperature of refrigerator body that is equipped with of refrigerator.

The electric cabinet is also used for receiving the CO stopping when the refrigerator door is in a closed state and the temperature in the refrigerator body is lower than a preset value₂Auxiliary refrigerationAfter the signal, the electromagnetic valve is controlled to be in a closed position, and the binary cascade refrigeration system is started at the same time.

The binary cascade refrigeration system comprises a high-temperature-level refrigeration system and a low-temperature-level refrigeration system which are connected with each other, the high-temperature-level refrigeration system comprises a high-temperature-level compressor, a condenser, a high-temperature-level capillary tube and an evaporative condenser which are sequentially connected, and one output end of the evaporative condenser is connected with the high-temperature-level compressor to form a closed loop;

the low-temperature-stage refrigeration system comprises a low-temperature-stage compressor, an evaporative condenser, a low-temperature-stage capillary tube and an evaporator which are sequentially connected, wherein one output end of the evaporative condenser is connected with the low-temperature-stage compressor to form a closed loop.

As shown in fig. 1, a high-temperature high-pressure gaseous refrigerant discharged from a high-temperature compressor 1 is condensed into a low-temperature high-pressure gas-liquid mixed refrigerant by a condenser 2, and then the refrigerant is throttled and depressurized by a high-temperature stage capillary tube 3 to enter an evaporative condenser 4 and finally returns to the high-temperature stage compressor 1, thereby forming a high-temperature stage refrigeration cycle. Similarly, the low-temperature compressor 5 discharges high-temperature and high-pressure gaseous refrigerant, and the discharged refrigerant enters the evaporative condenser 4. The evaporative condenser is used as an evaporator of a high-temperature stage and a condenser of a low-temperature stage, so that cold energy exchange can be carried out between the high-temperature stage and the low-temperature stage in the evaporative condenser 4. The cooled low-temperature refrigerant enters an evaporator 7 through the throttling and pressure reduction of a low-temperature capillary tube 6, and the low-temperature refrigerant is evaporated in the evaporator, so that the temperature in the ultra-low temperature refrigerator is reduced and the ultra-low temperature environment in the refrigerator is achieved. The low-temperature refrigerant passing through the evaporator finally returns to the low-temperature stage compressor 5 to form a low-temperature stage refrigeration cycle.

When the ultra-low temperature refrigerator is used for the first time or the refrigerator is closed again after being opened, the door opening sensor arranged on the outer door detects that the door is in a closed state and the temperature control probe in the cabinet detects that the temperature in the cabinet is higher than the set temperature of the controller in the electric cabinet, and then the electric cabinet 14 is changed from a standby state to an operating state. CO connected to the low-temperature fitting pipe 13₂CO flows out of the steel cylinder 8₂The gas passes through the low-temperature fitting pipe 13 and the electromagnetic valve 10, finally passes through the injection pipe 11 inserted into the ultra-low temperature refrigerator, and is directly injected into the ultra-low temperature by an interval type injection modeCO injection in refrigerator₂The gas realizes that the ultra-low temperature environment is quickly reached in the ultra-low temperature refrigerator cabinet. After the temperature in the cabinet reaches the ultra-low temperature environment, namely the temperature in the cabinet meets the temperature set by the controller in the electric cabinet, the electric cabinet 14 is converted from the running state to the standby state again, at the moment, the ultra-low temperature refrigerator keeps the ultra-low temperature state of the refrigerator through a binary cascade refrigeration system and corresponding refrigerants, and the refrigeration process is as shown in attached figure 1.

When the refrigeration equipment is powered off or fails, the electric cabinet controller operates the CO according to a power-off alarm signal sent by the refrigerator₂The auxiliary refrigerating device adopts the same method as the method, namely CO is directly injected into the refrigerator cabinet at intervals₂The gas refrigeration can maintain the ultra-low temperature state of the ultra-low temperature refrigerator within a certain time, and the sample safety of the refrigerator is ensured.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.