CN115537308A

CN115537308A - Culture box

Info

Publication number: CN115537308A
Application number: CN202111064349.8A
Authority: CN
Inventors: 刘占杰; 夏元通; 王毅; 郑文东; 陈海涛; 褚新兴
Original assignee: Qingdao Haier Biomedical Co Ltd
Current assignee: Qingdao Haier Biomedical Co Ltd
Priority date: 2021-09-10
Filing date: 2021-09-10
Publication date: 2022-12-30

Abstract

The application relates to the technical field of biological sample storage or culture, and discloses an incubator. This incubator includes: the refrigeration main loop is a closed loop formed by sequentially connecting a compressor, a condenser, a first throttling device and an evaporator; the pre-cooling pipeline is arranged on a first communication pipeline between the condenser and the first throttling device; and the liquid inlet end of the pre-cooling coil is connected to a pipeline between the condenser and the first throttling device, the liquid outlet end of the pre-cooling coil is connected to a pipeline between the evaporator and the compressor and used for cooling a refrigerant flowing through the pre-cooling pipeline, and the pre-cooling coil is provided with a second throttling device. The incubator that this disclosed embodiment provided, through the refrigerant of precooling coil pipe cooling process precooling pipeline, the refrigerant that makes entering evaporimeter precools in advance, has improved incubator refrigerating system's super-cooled rate, and then has promoted refrigerating system's refrigeration efficiency, simultaneously, has enlarged the refrigerating system's of incubator temperature control range, realizes the accurate regulation of incubator temperature.

Description

Culture box

Technical Field

The present application relates to the field of biological sample storage or culture technology, for example to an incubator.

Background

The professional experimental test and storage device in the fields of electronics, bioengineering, medical science and pharmacy, health and epidemic prevention and the like in China has higher requirements on temperature control, and low-temperature incubator products are produced to ensure a constant low-temperature environment.

At present, the refrigeration system of the low-temperature incubator on the market usually adopts a compressor start-stop mode, an electric heating internal balance compensation mode or a combination of the two modes.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

the common refrigeration equipment, such as a refrigerator, has low requirement on the control precision of the temperature, can realize the control of the temperature through the existing refrigeration modes such as a mode of starting and stopping a compressor and the like, but can only be controlled within the range of 2-8 ℃, and has higher requirement on the control precision of the temperature of incubator products, the existing refrigeration modes are difficult to realize wide-range temperature regulation and can not meet the requirement of +/-0.1 ℃ fluctuation degree of the incubator products, and meanwhile, frequent starting and stopping of the compressor not only can influence the service life of the compressor, but also can cause the energy consumption of the incubator to be greatly high.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides an incubator to solve the problem of how to realize the accurate regulation of the wide range temperature of incubator with low energy consumption.

In some embodiments, the incubator comprises: the refrigeration main loop is a closed loop formed by sequentially connecting a compressor, a condenser, a first throttling device and an evaporator; the pre-cooling pipeline is arranged on a first communication pipeline between the condenser and the first throttling device; and the liquid inlet end of the pre-cooling coil is connected to a pipeline between the condenser and the first throttling device, the liquid outlet end of the pre-cooling coil is connected to a pipeline between the evaporator and the compressor and used for cooling a refrigerant flowing through the pre-cooling pipeline, and the pre-cooling coil is provided with a second throttling device.

In some embodiments, the liquid inlet end of the pre-cooling coil is connected to a pipeline between the liquid outlet end of the pre-cooling pipeline and the first throttling device, and the liquid outlet end of the pre-cooling coil is connected to a pipeline between the evaporator and the compressor.

In some embodiments, the liquid inlet end of the pre-cooling coil is connected to a pipeline between the condenser and the liquid inlet end of the pre-cooling pipeline, and the liquid outlet end of the pre-cooling coil is connected to a pipeline between the evaporator and the compressor.

In some embodiments, the pre-cooling coil comprises: and the second throttling device is arranged on a pipeline between the liquid inlet end of the precooling coil pipe and the precooling pipeline.

In some embodiments, the incubator further comprises: and the drying filter is arranged at the liquid outlet end of the condenser and is used for filtering the refrigerant flowing out of the condenser.

In some embodiments, the incubator further comprises: and the gas-liquid separator is arranged at the gas return end of the compressor.

In some embodiments, the incubator further comprises: and the air return pipeline is arranged between the liquid outlet end of the evaporator and the gas-liquid separator, and the liquid outlet end of the precooling coil is connected to the air return pipeline.

In some embodiments, the incubator further comprises: and one end of the bypass branch is connected to a pipeline between the first throttling device and the evaporator, the other end of the bypass branch is connected to a pipeline between the compressor and the condenser, and the bypass branch is provided with a third throttling device.

In some embodiments, the incubator further comprises: a display device configured to display a real-time temperature and a set temperature of the incubator.

In some embodiments, the incubator further comprises: and the control device is configured to adjust the opening degree of the first throttling device according to the difference value between the set temperature and the real-time temperature displayed by the display device.

The incubator that this disclosed embodiment provided can realize following technological effect:

the incubator provided by the embodiment of the disclosure comprises a refrigeration main loop and a precooling pipeline, wherein the refrigeration main loop is provided with a first throttling device, the flow of a refrigerant entering an evaporator in the refrigeration main loop can be adjusted through the first throttling device, so that the temperature in the incubator can be adjusted, and in the process of adjusting the temperature, a compressor always runs, so that the problem of energy consumption improvement of the incubator caused by frequent startup and shutdown of the compressor for temperature adjustment is effectively avoided.

The existing incubator adopting the steam compressor cannot realize the adjustment of wide-range temperature in the incubator only by adjusting devices such as the compressor, a throttling element and the like in a refrigerating system due to the influence of factors such as the compressor, the throttling pressure difference and the like, and limits the temperature adjusting range of the refrigerating system. In particular, when the set temperature approaches the ambient temperature, the temperature in the incubator cannot be controlled to be close to the ambient temperature only by the refrigeration system due to the limitation of the pressure difference of the refrigeration system, and the refrigeration system needs to be matched with the heating element to achieve the effect that the set temperature approaches the ambient temperature.

The incubator provided by the embodiment of the disclosure further comprises a pre-cooling coil, and the pre-cooling coil is used for cooling a refrigerant flowing through a pre-cooling pipeline, so that the refrigerant entering the evaporator for refrigeration is pre-cooled in advance, and the supercooling degree of the refrigerant is improved. When the incubator operates, two refrigerant circulation loops operate, wherein one loop is a first circulation loop in which the refrigerant circulates in the refrigeration main loop, and the other loop is a second circulation loop in which the refrigerant returns to the compressor through the compressor, the condenser and the precooling coil. When the temperature of the incubator does not reach the set temperature, at the moment, the two circulation loops operate simultaneously, and the pre-cooling coil pipe of the second circulation loop provides a cooling condition for the refrigerant flowing through the pre-cooling pipeline in the first circulation loop, so that the refrigerant is pre-cooled before entering the evaporator for refrigeration, the degree of supercooling of the refrigerating system of the incubator is improved, and the refrigerating efficiency of the refrigerating system is further improved. When the temperature of incubator reaches the set temperature, the opening degree of first throttle is adjusted to minimum opening degree, or, the first throttling device is closed, most or all refrigerants only circulate in the second circulation loop, the effective heat exchange area of the evaporator is reduced, the temperature of the incubator is adjusted, in the process of adjusting the temperature of the incubator, the compressor is not stopped all the time, and the temperature in the incubator can be accurately controlled only through the refrigerating system of the incubator. The incubator provided by the embodiment of the disclosure enlarges the temperature adjusting range of the refrigerating system of the incubator on the premise of keeping the evaporating pressure of the whole refrigerant circulating system of the incubator basically unchanged, so that the temperature in the incubator is controllable and adjustable, and simultaneously, the refrigerant of the refrigeration main loop is precooled in advance, thereby improving the supercooling degree of the refrigerating system of the incubator and further improving the refrigerating efficiency of the refrigerating system. The temperature regulation range of the incubator provided by the embodiment of the disclosure can be from the lowest temperature to the ambient temperature, and the lowest temperature here can be less than or equal to 0 ℃.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

FIG. 1 is a schematic diagram of an incubator according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural view of another incubator provided by the disclosed embodiment;

FIG. 3 is a schematic structural view of another incubator provided by the disclosed embodiment;

FIG. 4 is a schematic structural diagram of another incubator provided by the embodiment of the disclosure;

FIG. 5 is a schematic structural diagram of another incubator provided by the embodiment of the disclosure;

FIG. 6 is a schematic structural diagram of another incubator according to an embodiment of the present disclosure.

Reference numerals:

1: a compressor; 2: a condenser; 3: a first throttling device; 4: an evaporator; 5: a pre-cooling pipeline; 6: pre-cooling the coil pipe; 7: a second throttling device; 8: drying the filter; 9: a gas-liquid separator; 10: a bypass branch; 11: and a third throttling device.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged as appropriate for the embodiments of the disclosure described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the disclosed embodiments and their embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation. Moreover, some of the above terms may be used in other meanings besides orientation or positional relationship, for example, the term "upper" may also be used in some cases to indicate a certain attaching or connecting relationship. The specific meanings of these terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art as appropriate.

In addition, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. Specific meanings of the above terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art according to specific situations.

The term "plurality" means two or more, unless otherwise specified.

In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. E.g., a and/or B, represents: a or B, or A and B.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

With reference to fig. 1 to 6, an embodiment of the present disclosure provides an incubator, which includes a main refrigeration circuit, a closed loop circuit formed by sequentially connecting a compressor 1, a condenser 2, a first throttling device 3, and an evaporator 4; the pre-cooling pipeline 5 is arranged on a first communication pipeline between the condenser 2 and the first throttling device 3; and the liquid inlet end of the pre-cooling coil 6 is connected to a pipeline between the condenser 2 and the first throttling device 3, the liquid outlet end of the pre-cooling coil 6 is connected to a pipeline between the evaporator 4 and the compressor 1 and used for cooling a refrigerant flowing through the pre-cooling pipeline 5, and the pre-cooling coil 6 is provided with a second throttling device 7.

In the embodiment of the present disclosure, the first throttling device 3 is not only used for adjusting the refrigerant circulation flow rate of the refrigeration main circuit, but also used for providing throttling resistance to enable the liquid refrigerant flowing through the first throttling device 3 to be throttled into a gas-liquid mixed refrigerant. The liquid inlet end and the liquid outlet end of the pre-cooling coil 6 are only used to express the flowing direction of the refrigerant, and the refrigerant may be a gaseous refrigerant, a liquid refrigerant, or a refrigerant in a gas-liquid two-phase coexisting state, and is not limited herein. When the incubator is in operation, two refrigerant circulation loops operate, wherein one loop is a first circulation loop in which a refrigerant circulates in a refrigeration main loop, and the other loop is a second circulation loop in which the refrigerant returns to the compressor 1 through the compressor 1, the condenser 2 and the precooling coil 6. When the temperature of the incubator does not reach the set temperature, at the moment, the two circulation loops operate simultaneously, and the pre-cooling coil 6 of the second circulation loop provides a cooling condition for the refrigerant flowing through the pre-cooling pipeline 5 in the first circulation loop, so that the refrigerant is pre-cooled before entering the evaporator 4 for refrigeration, the degree of supercooling of the refrigerating system of the incubator is improved, and the refrigerating efficiency of the refrigerating system is further improved. When the temperature of incubator reached the settlement temperature, adjust the aperture of first throttling arrangement 3 to minimum aperture, perhaps, close first throttling arrangement 3, make most or whole refrigerant only circulate in the second circulation circuit, the effective heat transfer area of evaporimeter 4 has been reduced, and then realize adjusting the temperature of incubator, in the middle of the process of adjusting the incubator temperature, compressor 1 does not shut down all the time, realized just can the temperature in the incubator by the refrigerating system of incubator, can realize reaching the accurate control of 0.1 ℃ to the temperature precision in the incubator, the problem that the energy consumption is big that the mode of the frequent start-stop machine that has avoided adopting compressor 1 caused.

Optionally, a water tank is disposed at the position of the pre-cooling pipeline 5, and the pre-cooling pipeline 5 and the pre-cooling coil 6 at the position of the pre-cooling pipeline 5 are disposed inside the water tank. In this way, the high-temperature and high-pressure gaseous refrigerant flowing out of the compressor 1 is condensed by the condenser 2, the temperature is reduced, the high-temperature gaseous refrigerant is gradually changed into a refrigerant in a gas-liquid two-phase coexisting state, finally, the medium-temperature and high-pressure liquid refrigerant flows out of the condenser 2, and is throttled and depressurized by the second throttling device 7 of the precooling coil 6 to be changed into a refrigerant in a low-temperature and low-pressure gas-liquid two-phase coexisting state.

Optionally, the coil of the pre-cooling coil 6 is coiled or sleeved on the pre-cooling pipeline 5. Like this, through coil pipe and precooling pipeline 5 direct contact, and then directly cool off the refrigerant in the precooling pipeline 5, need not set up other devices and just can realize the precooling, this kind of mode of setting simple structure.

Optionally, the liquid inlet end of the pre-cooling coil 6 is connected to a pipeline between the liquid outlet end of the pre-cooling pipeline 5 and the first throttling device 3, and the liquid outlet end is connected to a pipeline between the evaporator 4 and the compressor 1.

The refrigerant in the refrigeration main loop flows out from the liquid outlet end of the precooling pipeline 5 and then is divided, and a part of the refrigerant continues to be changed into the refrigerant in a low-temperature and low-pressure gas-liquid two-phase coexisting state along the circulation loop of the refrigeration main loop through the throttling of the first throttling device 3, enters the evaporator 4 to be evaporated, absorbs heat, is changed into the low-temperature and low-pressure gaseous refrigerant and returns to the compressor 1, so that the refrigeration is realized; the other part of the refrigerant enters from the liquid inlet end of the precooling coil pipe 6, and is changed into the refrigerant in a low-temperature and low-pressure gas-liquid two-phase coexisting state through throttling and pressure reduction of the second throttling device 7, in the process, the refrigerant absorbs heat in the water tank, the temperature of the water tank is reduced, the refrigerant flowing through the precooling pipeline 5 can be cooled, and the refrigerant is divided at the liquid outlet end of the precooling pipeline 5, so that all the refrigerants in the refrigeration main loop can be refrigerated, the precooling is realized before the refrigerant enters the evaporator 4 for refrigeration, and the refrigeration efficiency of the refrigeration system is improved.

Optionally, the liquid inlet end of the pre-cooling coil 6 is connected to the pipeline between the condenser 2 and the liquid inlet end of the pre-cooling pipeline 5, and the liquid outlet end is connected to the pipeline between the evaporator 4 and the compressor 1.

The refrigerant in the main refrigeration loop is divided after coming out of the condenser 2, and a part of the refrigerant is changed into a refrigerant in a low-temperature and low-pressure gas-liquid two-phase coexisting state through the precooling pipeline 5 and the throttling of the first throttling device 3 along the circulation loop of the main refrigeration loop, enters the evaporator 4 to be evaporated, absorbs heat, is changed into a low-temperature and low-pressure gaseous refrigerant, and returns to the compressor 1 to realize refrigeration; the other part of the refrigerant enters from the liquid inlet end of the precooling coil 6, and is changed into the refrigerant in a low-temperature and low-pressure gas-liquid two-phase coexisting state through throttling and pressure reduction of the second throttling device 7, in the process, the refrigerant absorbs heat in the water tank, the temperature of the water tank is reduced, the refrigerant flowing through the precooling pipeline 5 can be cooled, the refrigerant is divided before the liquid inlet end of the precooling pipeline 5, the refrigerant of a main precooling refrigeration loop is only precooled, the refrigerant of the precooling coil 6 is not precooled, precooling can be realized before the refrigerant enters the evaporator 4 for refrigeration, and the refrigeration efficiency of the refrigeration system is improved.

Optionally, the pre-cooling coil 6 includes a second throttling device 7, which is disposed in a pipeline between the liquid inlet end of the pre-cooling coil 6 and the pre-cooling pipeline 5.

The second throttling device 7 is arranged on a pipeline between the liquid inlet end of the precooling coil 6 and the precooling pipeline 5, so that the refrigerant is throttled before flowing through the pipeline at the position of the precooling pipeline 5, and after the refrigerant in the precooling coil 6 is throttled by the second throttling device 7, the refrigerant can absorb heat and become a low-temperature and low-pressure refrigerant in a gas-liquid two-phase coexisting state when flowing through the pipeline at the position of the precooling pipeline 5, the temperature of the precooling pipeline 5 is reduced, and the purpose of cooling the refrigerant flowing through the precooling pipeline 5 is achieved.

Optionally, the incubator further includes a dry filter 8 disposed at the liquid outlet end of the condenser 2 for filtering the refrigerant flowing out of the condenser 2.

Because the refrigerant has residual moisture, solid powder and other impurities in the refrigeration cycle process, in order to prevent blocking the throttling device, a drying filter 8 needs to be arranged in the refrigeration system for filtering, the refrigerant in the refrigeration main loop can be shunted at the liquid inlet end of the precooling pipeline 5, and the precooling coil 6 is provided with a second throttling device 7, so that the drying filter 8 is arranged at the liquid outlet end of the condenser 2, the refrigerant is filtered before being shunted, and the problem that the evaporator 4 cannot supply insufficient liquid and further the refrigeration system cannot work normally due to blocking the throttling device is effectively avoided.

Optionally, the incubator further comprises a gas-liquid separator 9 disposed at the gas return end of the compressor 1.

And a gas-liquid separator 9 can be arranged at the gas return end of the compressor 1, so that the liquid impact phenomenon is reduced, and the stability of the incubator in the operation process is improved.

Optionally, the incubator further includes a gas return line disposed between the liquid outlet end of the evaporator 4 and the gas-liquid separator 9, and the liquid outlet end of the pre-cooling coil 6 is connected to the gas return line.

The more the incubator approaches ambient temperature, the more refrigerant flows back to the compressor 1 through the pre-cooling coil 6. Because the heat exchange capacity of the pre-cooling coil 6 is limited, when more liquid refrigerant flows back to the compressor 1 through the pre-cooling coil 6, the liquid impact phenomenon is easy to occur. Due to the addition of the air return pipeline, the path length of the refrigerant flowing back to the compressor 1 through the precooling coil 6 is increased, the heat exchange time of the refrigerant is prolonged, the liquid impact phenomenon is reduced, and the stability of the incubator in the operation process is improved. Optionally, the air return pipeline is a pipeline with the same diameter and material as the pre-cooling coil 6, and the material may be copper. Optionally, the air return pipeline is arranged in a spiral shape, and the space occupied by the air return pipeline in the incubator is reduced.

Optionally, the incubator further comprises a bypass branch 10, one end of which is connected to the pipeline between the first throttling device 3 and the evaporator 4, and the other end of which is connected to the pipeline between the compressor 1 and the condenser 2, the bypass branch 10 being provided with a third throttling device 11.

After the incubator is operated for a period of time, particularly at a lower temperature for a period of time, a layer of frost forms on the surface of the evaporator 4, and the existence of the frost layer can influence the cold exchange of the evaporator 4 and seriously reduce the refrigeration efficiency of the incubator.

Through setting up bypass branch road 10, bypass branch road 10 one end is connected in the pipeline between first throttling arrangement 3 and evaporimeter 4, and the other end is connected in the pipeline between compressor 1 and condenser 2, and bypass branch road 10 can adjust bypass branch road 10's flow through third throttling arrangement 11, will pass through the high temperature refrigerant that compressor 1 flows out and introduce bypass branch road 10, finally flow into evaporimeter 4, improve the temperature of evaporimeter 4, realized the defrosting to evaporimeter 4. By opening and closing and opening adjustment of the third throttling device 11, defrosting of the evaporator 4 is realized, and the cooling capacity exchange efficiency of the evaporator 4 is improved.

Optionally, the incubator further comprises a display device configured to display the real-time temperature and the set temperature of the incubator.

Set up display device at the incubator, display device shows the real-time temperature of incubator and sets for the temperature, and convenience of customers can master the temperature variation of incubator at any time, and when the real-time temperature of incubator was greater than or was less than when setting for the temperature, in time adjusted first throttling arrangement 3's aperture, made the temperature in the incubator obtain accurate control.

Optionally, the incubator further comprises a control device configured to adjust the opening degree of the first throttling device 3 according to the difference between the set temperature and the real-time temperature displayed by the display device.

When the difference between the set temperature and the real-time temperature is greater than 0, that is, the set temperature is greater than the real-time temperature, the control device adjusts the opening degree of the first throttling device 3 to operate at the minimum opening degree, or the control device adjusts the first throttling device 3 to close, or controls the first throttling device 3 to switch between the minimum opening degree and the closed state.

When the difference between the set temperature and the real-time temperature is less than 0, that is, the set temperature is less than the real-time temperature, the control device adjusts the opening degree of the first throttling device 3 to operate at the maximum opening degree, or gradually adjusts the opening degree of the first throttling device 3 to the maximum opening degree, or controls the first throttling device 3 to switch between the minimum opening degree and the maximum opening degree.

The temperature of the incubator is maintained at a temperature close to the set temperature by controlling the opening degree of the first throttle device 3 by the control device, and the temperature adjustment range of the refrigeration system of the incubator is increased. It will be understood that the minimum opening degree of the first throttle device 3 is the minimum effective opening degree of the first throttle device 3, and the set temperature may be lower than the ambient temperature, equal to the ambient temperature, or higher than the ambient temperature.

The existing incubator adopting the steam compressor cannot realize the control of maintaining the temperature in the incubator at the temperature close to the ambient temperature only by adjusting devices such as the compressor, a throttling element and the like in a refrigerating system due to the influence of factors such as the compressor, the throttling pressure difference and the like, the control temperature of the refrigerating system needs to be reduced, and then the temperature in the incubator is maintained at the temperature close to the ambient temperature by heating of the heating element, so that the energy consumption of the incubator is increased.

The incubator provided by the embodiment of the disclosure can adjust the opening of the first throttling device 3 to the minimum when the set temperature is close to the ambient temperature and the real-time temperature is less than the set temperature, or close the first throttling device 3, so that most or all of the refrigerant flows back to the compressor 1 through the precooling coil 6, and further the effective heat exchange area of the evaporator 4 is reduced, the temperature in the incubator is controlled near the set temperature only through the refrigerating system of the incubator, the temperature regulation range of the refrigerating system of the incubator is enlarged, and the energy consumption is reduced.

Optionally, the incubator further comprises a heating element.

When the set temperature is greater than the ambient temperature, the heating element can be turned on to increase the temperature in the incubator, so as to meet the set requirement that the set temperature is greater than the ambient temperature, and further increase the temperature regulation range of the incubator.

Optionally, the incubator provided with the heating element can realize temperature setting with the set temperature being greater than the ambient temperature, such as 50 ℃, 60 ℃, 70 ℃ and the like, even greater than 70 ℃, so that the temperature regulation range of the incubator is improved. The embodiment of the disclosure provides an incubator provided with a heating element, which can realize adjustment from the lowest temperature to the highest temperature, wherein the lowest temperature can be 0 ℃ or even lower than 0 ℃, the highest temperature can be 70 ℃ or even higher than 70 ℃, so that temperature regulation of trans-annular temperature is realized, and the temperature regulation range of the incubator is improved.

Alternatively, the control device controls the heating element to be turned off when the set temperature is less than or equal to the ambient temperature, and controls the heating element to be turned on when the set temperature is greater than the ambient temperature.

According to the incubator provided by the embodiment of the disclosure, when the set temperature is less than or equal to the ambient temperature, the temperature in the incubator can be adjusted and controlled through the refrigerant circulating system of the incubator, and at the moment, the heating element does not need to be started for temperature compensation; when the set temperature is higher than the ambient temperature, the heating element can be controlled to be turned on, so that the temperature in the incubator meets the temperature set by a user.

Alternatively, the second throttling means 7 may be a capillary tube or a capillary tube assembly, and when the first throttling means 3 is in a closed state, that is, all the refrigerant in the incubator flows back to the compressor 1 through the pre-cooling coil 6, the throttling capacity of the capillary tube or the capillary tube assembly is sufficient to stabilize the whole system of the incubator.

Optionally, the capillary tube assembly includes a plurality of capillary tubes connected in parallel and having different lengths, so as to adapt to different refrigerant flow rates flowing through the pre-cooling coil 6. Selectively conducting capillaries or combinations of capillaries in parallel can achieve different throttling resistances for the capillary assembly. For example, the capillary component comprises a first capillary, a second capillary and a third capillary, three kinds of throttling resistance can be realized when one capillary is in a conducting state, three kinds of throttling resistance can be realized when two capillaries are in a conducting state, one kind of throttling resistance can be realized when all three capillaries are in a conducting state, and seven kinds of different throttling resistance can be realized.

Alternatively, the second throttle device 7 may be various devices having a flow rate adjusting function, such as an electromagnetic valve, a proportional valve, or a flow rate control valve, and is not limited herein.

Alternatively, the first throttling means 3 may be adapted to regulate the refrigerant flow rate of the main cooling circuit from 0 to a predetermined maximum opening, and is characterized by being capable of being completely closed and of realizing a very small refrigerant flow rate flow, so as to control the temperature in the incubator close to the ambient temperature. When the opening degree is 0, that is, when no refrigerant flows in the evaporator 4, the evaporator 4 does not perform a cooling function. When the first throttling device 3 operates at a minimum opening degree or is switched between a minimum effective opening degree and a complete closing state, the minimum and most appropriate refrigerant flow can be realized, so that the control of the real-time temperature in the incubator to be close to the set temperature is realized.

Optionally, the evaporator 4 provided by the embodiment of the present disclosure may adjust and control the temperature in the incubator between a minimum temperature and a set temperature, wherein the minimum temperature may be 0 ℃ or below 0 ℃. The evaporator 4 that this disclosed embodiment provided is effective heat transfer area adjustable evaporator 4, and when evaporator 4's whole area becomes effective heat transfer area, evaporator 4's heat transfer area should be able to satisfy the biggest refrigeration demand of whole incubator, and the biggest effective heat transfer area of evaporator 4 is decided by actual biggest heat transfer area promptly, and actual biggest heat transfer area is decided by the biggest heat load of device. Alternatively, the evaporator 4 refrigerant flow direction is in a top-in-bottom-out fashion.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and illustrated in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An incubator, comprising:

the refrigeration main loop is a closed loop formed by sequentially connecting a compressor, a condenser, a first throttling device and an evaporator;

the pre-cooling pipeline is arranged on a first communication pipeline between the condenser and the first throttling device;

and the liquid inlet end of the pre-cooling coil is connected to a pipeline between the condenser and the first throttling device, the liquid outlet end of the pre-cooling coil is connected to a pipeline between the evaporator and the compressor and used for cooling a refrigerant flowing through the pre-cooling pipeline, and the pre-cooling coil is provided with a second throttling device.

2. The incubator of claim 1,

the liquid inlet end of the pre-cooling coil pipe is connected to a pipeline between the liquid outlet end of the pre-cooling pipeline and the first throttling device, and the liquid outlet end of the pre-cooling coil pipe is connected to a pipeline between the evaporator and the compressor.

3. The incubator of claim 1,

the liquid inlet end of the pre-cooling coil pipe is connected to a pipeline between the condenser and the liquid inlet end of the pre-cooling pipeline, and the liquid outlet end of the pre-cooling coil pipe is connected to a pipeline between the evaporator and the compressor.

4. An incubator according to claim 2 or 3,

the second throttling device is arranged on a pipeline between the liquid inlet end of the pre-cooling coil pipe and the pre-cooling pipeline.

5. The incubator of claim 1, further comprising:

and the drying filter is arranged at the liquid outlet end of the condenser and is used for filtering the refrigerant flowing out of the condenser.

6. The incubator of claim 1, further comprising:

and the gas-liquid separator is arranged at the gas return end of the compressor.

7. The incubator of claim 6, further comprising:

and the air return pipeline is arranged between the liquid outlet end of the evaporator and the gas-liquid separator, and the liquid outlet end of the precooling coil is connected to the air return pipeline.

8. The incubator of claim 1, further comprising:

and one end of the bypass branch is connected to a pipeline between the first throttling device and the evaporator, the other end of the bypass branch is connected to a pipeline between the compressor and the condenser, and the bypass branch is provided with a third throttling device.

9. The incubator according to any one of claims 1 to 8, further comprising:

a display device configured to display a real-time temperature and a set temperature of the incubator.

10. The incubator of claim 9, further comprising:

and the control device is configured to adjust the opening degree of the first throttling device according to the difference value between the set temperature and the real-time temperature displayed by the display device.