CN111435040A - Refrigerating system and refrigerating equipment - Google Patents
Refrigerating system and refrigerating equipment Download PDFInfo
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- CN111435040A CN111435040A CN201910027564.7A CN201910027564A CN111435040A CN 111435040 A CN111435040 A CN 111435040A CN 201910027564 A CN201910027564 A CN 201910027564A CN 111435040 A CN111435040 A CN 111435040A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/005—Compression machines, plants or systems with non-reversible cycle of the single unit type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/006—Accumulators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
Abstract
The invention belongs to the technical field of refrigeration equipment, and discloses refrigeration equipment, which comprises: the condenser is connected with the evaporator through a pipeline, and the evaporator is connected with the compressor through a pipeline; a first interface of the switching communication device is connected with an outlet of the condenser, a second interface is connected with an inlet of the first liquid storage device, and a third interface is connected with an inlet of a high-pressure cavity of the second liquid storage device; the air outlet port of the first liquid storage device is connected with the high-pressure cavity inlet of the second liquid storage device; the outlet of the first reservoir is connected to the inlet of the low-pressure cavity of the second reservoir through a first throttling device; an outlet of the high-pressure cavity of the second liquid storage device is connected to an inlet of the evaporator through a second throttling device; the outlet of the low-pressure cavity is connected with the inlet of the evaporator through a pipeline. This scheme can be according to the demand of different refrigerating capacities for the mixed refrigerant of different boiling point circulates in refrigerating system, is the low energy consumption that uses little discharge capacity compressor, refrigerating system of high freezing ability.
Description
Technical Field
The invention relates to the technical field of refrigeration equipment, in particular to a refrigeration system and refrigeration equipment.
Background
However, for refrigeration equipment with large volume, such as a refrigerator with a capacity of more than 500L, the applicable inverter compressor is high in price and high in cost.
Disclosure of Invention
The embodiment of the invention provides a refrigerating system and refrigerating equipment, and aims to solve the problems of high power consumption and high cost of high-capacity refrigerating equipment in the prior art. 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 and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
According to a first aspect of embodiments of the present invention, a refrigeration device is provided.
In some optional embodiments, the refrigeration appliance comprises: the condenser is provided with a condensing fan, and further comprises a switching and communicating device, a first liquid storage device and a second liquid storage device; a first interface of the switching communication device is connected with an outlet of the condenser, a second interface of the switching communication device is connected with an inlet of the first liquid storage device, and a third interface of the switching communication device is connected with an inlet of a high-pressure cavity of the second liquid storage device; the air outlet port of the first liquid reservoir is connected with the high-pressure cavity inlet of the second liquid reservoir; the outlet of the first reservoir is connected to the inlet of the evaporator by a first throttling device; the outlet of the high-pressure cavity of the second liquid reservoir is connected to the inlet of the evaporator through a second throttling device; the outlet of the low-pressure cavity is connected with the inlet of the evaporator through a pipeline;
introducing refrigerants into the system, wherein the refrigerants comprise a first refrigerant and a second refrigerant with different boiling points;
when the refrigerating system operates in a low refrigerating capacity mode, the first interface of the switching communication device is communicated with the second interface;
and when the refrigerating system operates in a large refrigerating capacity mode operation mode, the first interface of the switching communication device is communicated with the third interface.
The difference of the refrigerating capacities of different refrigerants is large, and the refrigerating capacities of the same compressor for sucking different refrigerants and outputting the same refrigerant under the same condition are different. Two kinds of cold energy input are realized by inputting mixed refrigerants with different boiling points.
In some alternative embodiments, the second reservoir is further provided with a low pressure chamber connected in series between the first throttle device and the inlet of the evaporator. The low pressure chamber is formed by a pipeline, and the pipeline is arranged in the high pressure chamber.
In some optional embodiments, a one-way valve is arranged between the air outlet port of the first reservoir and the high-pressure chamber inlet of the second reservoir. The flow direction of the one-way valve is from the air outlet port of the first reservoir to the high-pressure cavity inlet of the second reservoir. In other alternative embodiments, the check valve may be replaced by a solenoid valve with controllable switch.
In some optional embodiments, a first air return pipeline is arranged between the outlet of the first liquid storage tank and the first throttling device, and an air return pipeline is arranged between the evaporator and the air suction port of the compressor; the first heat return pipeline exchanges heat with the air return pipeline. So, through setting up the heat return pipeline, carry out the heat transfer with the return-air duct, improve the refrigerant temperature that gets into the compressor, prevent the liquid attack, thereby prevent simultaneously that the return-air pipe temperature is lower to the environment discharge cold volume and lead to the cold volume loss.
In some optional embodiments, a second heat return pipeline is arranged between the high pressure chamber outlet of the second reservoir and the second throttling device; the second heat return pipeline exchanges heat with the air return pipeline. So, through setting up the heat return pipeline, carry out the heat transfer with the return-air duct, improve the refrigerant temperature that gets into the compressor, prevent the liquid attack, thereby prevent simultaneously that the return-air pipe temperature is lower to the environment discharge cold volume and lead to the cold volume loss.
In some alternative embodiments, the first reservoir is provided with an electrical heating tape. Preferably, the electric heating belt is arranged at the bottom of the shell of the first liquid storage device, so that the gasification of the low-boiling-point liquid refrigerant in the first liquid storage device is accelerated, and the low-boiling-point liquid refrigerant is quickly separated out.
In some alternative embodiments, the high pressure chamber of the second reservoir is provided with an electrical heating tape; the pipeline of the low-pressure cavity is arranged at the top of the high-pressure cavity. Preferably, the electric heating belt is arranged at the bottom of the high-pressure cavity shell of the second liquid storage device and used for accelerating the gasification of the high-boiling-point liquid refrigerant in the second liquid storage device so as to quickly separate the high-boiling-point liquid refrigerant. Preferably, the pipeline of the low-pressure cavity is spirally wound at the top of the high pressure, so that the gaseous refrigerant at the top of the high-pressure cavity is easily liquefied and falls back to the bottom of the high-pressure cavity.
In some optional embodiments, the control device is further included for executing the operation instruction; the control device includes:
a first unit for controlling the first throttling device according to the operation instruction;
the second unit is used for controlling the second throttling device according to the operation instruction;
a third unit for controlling the switching communication device.
In some optional embodiments, the control device is specifically configured to:
when the operation instruction is a small refrigerating capacity mode operation instruction, the first unit controls the first throttling device to throttle, and the second unit controls the second throttling device to close; the third unit controls the conduction of the first interface and the second interface of the switching communication device;
when the operation instruction is a large refrigerating capacity mode operation instruction, the first unit controls the first throttling device to be closed, and the second unit controls the second throttling device to be throttled; and the third unit controls the conduction of the first interface and the third interface of the switching communication device.
Optionally, the control device is further configured to, when the operation instruction is a refrigerant separation mode operation instruction, control the first throttling device to close by the first unit, control the second throttling device to throttle by the second unit, and control the first section of the switching and communicating device to be communicated with the second interface by the third unit.
Optionally, the control device further includes a refrigerant parameter sensor disposed at an outlet of the condenser, and configured to detect a refrigerant parameter at the outlet of the condenser;
the third unit is further configured to control the first interface and the third interface of the switching and communicating device to be communicated when the operation instruction is a first mode operation instruction and when the refrigerant parameter reaches a set threshold value.
According to a second aspect of embodiments of the present invention, there is provided a refrigeration apparatus including the refrigeration system described above.
The technical scheme provided by the embodiment of the invention has the following beneficial effects: this scheme is through setting up switching intercommunication device and first reservoir, second reservoir to can be according to the demand of different refrigeration capacities, make the mixed refrigerant of different boiling point circulate in refrigerating system, be one kind and use the low energy consumption of little discharge capacity compressor, the refrigerating system of big freezing ability. When the required refrigerating capacity is small, the refrigerating equipment can meet the low-load requirement in stable operation by using the system, and the power consumption is low; when the refrigerating capacity is large, the refrigerating equipment can realize rapid cooling by using the system.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic diagram illustrating a refrigeration system according to an exemplary embodiment.
Fig. 2 is a schematic configuration diagram of a control device of the refrigeration system shown in fig. 1.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments herein to enable those skilled in the art to practice them. Portions and features of some embodiments may be included in or substituted for those of others. The scope of the embodiments herein includes the full ambit of the claims, as well as all available equivalents of the claims. The terms "first," "second," and the like, herein are used solely to distinguish one element from another without requiring or implying any actual such relationship or order between such elements. In practice, a first element can also be referred to as a second element, and vice versa. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a structure, apparatus, or device that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such structure, apparatus, or device. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a structure, device or apparatus that comprises the element. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like herein, as used herein, are defined as orientations or positional relationships based on the orientation or positional relationship shown in the drawings, and are used for convenience in describing and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. In the description herein, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, and indirect connections via intermediary media, where the specific meaning of the terms is understood by those skilled in the art as appropriate.
Herein, the term "plurality" means two or more, unless otherwise specified.
Herein, the character "/" indicates that the preceding and following objects are in an "or" relationship. For example, A/B represents: a or B.
Herein, the term "and/or" is an associative relationship describing objects, meaning that three relationships may exist. For example, a and/or B, represents: three relationships of A or B, or A and B
FIG. 1 is a schematic block diagram illustrating a refrigeration system according to an exemplary embodiment; fig. 2 is a schematic configuration diagram of a control device of the refrigeration system shown in fig. 1.
As shown in fig. 1, the refrigeration system provided in this embodiment includes a compressor 10, a condenser 20 connected to an exhaust port of the compressor 10, an evaporator 30 connected to a suction port of the compressor 10, the condenser 20 having a condensing fan 21, a switching and communicating device 80, a first reservoir 51, and a second reservoir 52;
the switching communication device 80 has a first interface connected to the outlet of the condenser 20, a second interface connected to the inlet of the first accumulator 51, and a third interface connected to the high pressure chamber inlet of the second accumulator 52;
the air outlet port of the first reservoir 51 is connected with the high-pressure cavity inlet of the second reservoir 52; the outlet of the first reservoir 51 is connected to the inlet of the evaporator 30 via a first throttle device 41;
the high pressure chamber outlet of the second reservoir 52 is connected to the inlet of the evaporator 30 via a second restriction 42; the low pressure chamber outlet is connected to the inlet of the evaporator 30 by a pipe.
Optionally, the second reservoir 52 is also provided with a low pressure chamber connected in series between the first throttle device 41 and the inlet of said evaporator 30. The second reservoir 52 has two cavities, a low pressure cavity and a high pressure cavity, which are not communicated, the low pressure cavity is formed by a pipeline, and the pipeline is arranged in the high pressure cavity; the refrigerant between the two cavities can exchange heat through the wall surface separating the two cavities.
Optionally, a refrigerant is circulated in the refrigeration system, and the refrigerant includes a first refrigerant and a second refrigerant with different boiling points.
Optionally, the first refrigerant and the second refrigerant are difluoromethane (hereinafter referred to as R32) and isobutane (hereinafter referred to as R600a), respectively;
optionally, the first refrigerant and the second refrigerant are R32 and propane (hereinafter referred to as R290), respectively;
optionally, the first refrigerant and the second refrigerant are R290 and R600a, respectively.
Optionally, the refrigeration system further comprises a control device 90 for executing the operation instructions; the control device 90 includes:
a first unit 91 for controlling the first throttling device 41 according to the operating instructions;
a second unit 92 for controlling the second throttle device 42 according to the operation instruction;
a third unit 93 for controlling the switching communication device 80 according to the operation instruction.
Optionally, the control device 90 is specifically configured to:
when the operation instruction is a small cooling capacity mode operation instruction, the first unit 91 controls the first throttling device 41 to throttle, and the second unit 92 controls the second throttling device 42 to close; the third unit 93 controls the first interface and the second interface of the switching communication device 80 to be conducted;
when the operation instruction is a large cooling capacity mode operation instruction, the first unit 91 controls the first throttling device 41 to close, and the second unit 92 controls the second throttling device 42 to throttle; the third unit 93 controls the first interface and the third interface of the switching communication device 80 to be conducted.
When the operation instruction is a refrigerant separation mode operation instruction, the first unit 91 controls the first throttling device 41 to close, and the second unit 92 controls the second throttling device 42 to throttle; the third unit 93 controls the first interface and the second interface of the switching communication device 80 to be conducted.
The control device 90 further includes a refrigerant parameter sensor 94 disposed at the outlet of the condenser 20 for detecting the refrigerant parameter at the outlet of the condenser 20; when the refrigerant parameter reaches the set threshold, the refrigerant separation operation mode may be switched to the high cooling capacity mode, that is, the third unit 93 is further configured to control the first interface and the third interface of the switching and communicating device 80 to be conducted.
Optionally, the refrigerant parameter sensor 94 is a temperature sensor and a pressure sensor.
Taking the first refrigerant R32 and the second refrigerant R600a as an example, in the refrigerant separation mode operation command, the first throttle device 41 is closed, and the second throttle device 42 is throttled; the first interface and the second interface of the switching communication device 80 are conducted. Wherein the second unit 92 adjusts the opening degree of the second throttling means 42 according to the degree of superheat at the outlet of the evaporator 30. At this time, the high-temperature and high-pressure mixed gaseous refrigerant discharged from the compressor 10 enters the condenser 20 and begins to condense, because the boiling point of R600a is significantly higher than that of R32, R600a is more likely to condense into liquid in the condenser 20, and the liquid outlet of the condenser 20 discharges the refrigerant of gas-liquid two-phase; wherein, the liquid refrigerant is rich in R600a, and the gaseous refrigerant is rich in R32. The gas-liquid two-phase refrigerant enters the first accumulator 51 through the switching communication device 80. The first accumulator 51 has a gas-liquid separation function, after the gas-liquid two-phase refrigerant enters the first accumulator 51, the bottom in the first accumulator 51 is a liquid refrigerant rich in R600a, and the upper in the first accumulator 51 is a gaseous refrigerant rich in R32; the gaseous refrigerant enriched with R32 at the upper part of the first accumulator 51 enters the high pressure chamber of the second accumulator 52, and the gaseous refrigerant enriched with R32 is near the top and the liquid refrigerant enriched with R32 is near the bottom of the high pressure chamber of the second accumulator 52. The liquid refrigerant rich in R32 at the bottom of the second accumulator 52 is throttled by the second throttling device 42 and enters the evaporator 30 to start refrigeration, and the mixed refrigerant of the gaseous R32 and the gaseous R600a output by the evaporator 30 enters the compressor 10 to be compressed into the gaseous refrigerant with high temperature and high pressure, and the cycle is repeated. As such, as the cycle progresses, the refrigerant in the evaporator 30 and the condenser 20 contains more and more R32 components, while the refrigerant containing R600a components is stored in the first accumulator 51 and accumulates more and more.
Through the temperature sensor and the pressure sensor arranged at the outlet of the condenser 20, when the detected pressure value and the detected temperature value reach the set threshold values, the large cooling capacity mode starts to be operated, and the third unit 93 controls the first interface and the third interface of the switching communication device 80 to be communicated. At this time, the refrigerant rich in R32 at the outlet of the condenser 20 flows from the condenser 20 to the high-pressure chamber of the second accumulator 52 through the switching communication device 80, and then throttled by the second throttling device 42 to enter the evaporator 30, where it is evaporated to enter the suction port of the compressor 10. Because the volume refrigerating capacity of R32 is obviously higher than that of R600a, the refrigerating capacity provided by the system at the moment is larger, and the temperature can be rapidly reduced.
Optionally, a value of the set threshold is associated with a ratio of the first refrigerant to the second refrigerant in the refrigerant at the outlet of the condenser.
Under the operation instruction of the low refrigerating capacity mode, the first throttling device 41 throttles, and the second throttling device 42 is closed; the first interface and the second interface of the switching communication device 80 are conducted. Wherein the first unit 91 adjusts the opening degree of the first throttling device 41 according to the superheat degree of the air outlet of the evaporator 30. At this time, the high-temperature and high-pressure mixed gaseous refrigerant discharged from the compressor 10 enters the condenser 20 and begins to condense, since the boiling point of R600a is significantly higher than that of R32, R600a is more easily condensed into liquid in the condenser 20, and the outlet of the condenser 20 discharges the refrigerant of gas-liquid two phases; wherein, the liquid refrigerant is rich in R600a, and the gaseous refrigerant is rich in R32. The gas-liquid two-phase refrigerant enters the first accumulator 51 through the switching communication device 80. The first accumulator 51 has a large cavity and a gas-liquid separation function, so that the liquid refrigerant rich in R600a is at the bottom of the first accumulator 51, and the gas refrigerant rich in R32 is at the upper part of the first accumulator 51. The liquid refrigerant rich in R600a at the bottom in the first liquid accumulator 51 is throttled and cooled by the first throttling device 41, enters the low-pressure cavity of the second liquid accumulator 52, the refrigerant in the high-pressure cavity is cooled by the cavity wall of the low-pressure cavity, the gaseous refrigerant rich in R32 in the high-pressure cavity is continuously liquefied, so that the gaseous refrigerant rich in R32 at the top in the first liquid accumulator 51 continuously enters the high-pressure cavity of the second liquid accumulator 52 and is continuously liquefied, the low-temperature refrigerant rich in R600a in the low-pressure cavity of the second liquid accumulator 52 continuously enters the evaporator 30 for refrigeration, the gaseous refrigerant output by the evaporator 30 is a mixed refrigerant of R32 and R600a, and after entering the suction port of the compressor 10, the gaseous refrigerant compressed into high-temperature high-pressure is repeatedly circulated,
As such, as the cycle progresses, the refrigerant in the evaporator 30 and the condenser 20 contains more and more R600a components, and at the same time, the R32 refrigerant is stored in the high-pressure chamber of the second accumulator 52 and accumulates more, and the high-pressure chamber of the second accumulator 52 is also filled with the liquid refrigerant. At this time, the refrigerant rich in R600a in the circulation circuit is discharged from the compressor 10 in the refrigeration system, enters the switching communication device 80 through the condenser 20, is discharged from the first receiver 51 to the first throttle device 41, is throttled and cooled, enters the low pressure chamber of the second receiver 52, and returns to the suction port of the compressor 10 through the evaporator 30. Because the volume refrigerating capacity of the R600a refrigerant is obviously lower than that of the R32, the refrigerating capacity provided by the system at the moment is smaller, the low-load requirement in stable operation can be met, and the power consumption is lower.
Optionally, a check valve 70 is disposed between the air outlet port of the first reservoir 51 and the high pressure chamber inlet of the second reservoir 52. The check valve 70 flows in the direction from the outlet port of the first reservoir 51 to the inlet of the high pressure chamber of the second reservoir 52. In alternative embodiments, the check valve 70 may be replaced by a solenoid valve that is controllable by a switch.
When a solenoid valve is disposed between the outlet port of the first reservoir 51 and the inlet of the high pressure chamber of the second reservoir 52, the control device 90 further includes a fourth unit for controlling the solenoid valve. The fourth unit is specifically configured to, when the operation instruction is a small cooling capacity mode operation instruction, control the electromagnetic valve to close according to a temperature value and a pressure value detected by a temperature sensor and a pressure sensor arranged at an outlet of the condenser 20 when a set threshold is reached. At this time, the refrigerant rich in R600a in the circulation circuit of the refrigeration system is discharged from the compressor 10 in the refrigeration system, enters the switching communication device 80 through the condenser 20, is discharged from the first accumulator 51 to the first throttling device 41, is throttled and cooled, enters the low pressure chamber of the second accumulator 52, and then returns to the suction port of the compressor 10 through the evaporator 30. Because the volume refrigerating capacity of R600a is obviously lower than that of R32, the refrigerating capacity provided by the system at the moment is smaller, the low-load requirement in stable operation can be met, and the power consumption is lower.
Optionally, a first air return pipe 61 is disposed between the outlet of the first reservoir 51 and the first throttling device 41, and an air return pipe 63 is disposed between the evaporator 30 and the air suction port of the compressor 10; the first return air duct 61 exchanges heat with the return air duct 63. Thus, by providing the heat return pipe to exchange heat with the air return pipe 63, the temperature of the refrigerant entering the compressor 10 is increased, liquid impact is prevented, and meanwhile, the temperature of the air return pipe is prevented from being low, so that cold energy is discharged to the environment to cause cold energy loss.
Optionally, a second heat return pipeline 62 is arranged between the high pressure chamber outlet of the second reservoir 52 and the second throttling device; the second heat return pipe 62 exchanges heat with the air return pipe 63. Thus, by providing the heat return pipe to exchange heat with the air return pipe 63, the temperature of the refrigerant entering the compressor 10 is increased, liquid impact is prevented, and meanwhile, the temperature of the air return pipe is prevented from being low, so that cold energy is discharged to the environment to cause cold energy loss.
Optionally, the first reservoir 51 is provided with an electrical heating tape. Preferably, the electric heating belt is disposed at the bottom of the case of the first accumulator 51, and accelerates the vaporization of the R32 liquid refrigerant in the first accumulator 51, so that it is rapidly separated.
Optionally, a gas return pipe is inserted into an upper portion of the inner cavity of the first reservoir 51, and the opening degree of the first throttling device 41 or the second throttling device 42 is controlled during refrigerant separation. The return air pipe in the first accumulator 51 is lowered to a proper temperature, so that the gaseous R600a refrigerant at the upper part of the first accumulator 51 is liquefied and falls back to the bottom of the first accumulator 51, thereby enhancing the refrigerant separation effect.
Optionally, the high pressure chamber of the second reservoir 52 is provided with an electrical heating tape; the pipeline of the low-pressure cavity is arranged at the top of the high-pressure cavity. Preferably, the electric heating belt is disposed at the bottom of the high pressure chamber housing of the second accumulator 52 for accelerating the vaporization of the liquid refrigerant in the second accumulator 52 to be rapidly separated. Preferably, the pipeline of the low-pressure cavity is spirally arranged at the top of the high pressure, so that the gaseous refrigerant at the top of the high-pressure cavity is easily liquefied and falls back to the bottom of the high-pressure cavity.
Optionally, the switching and communicating device 80 is a two-position three-way valve, or a first electromagnetic valve and a second electromagnetic valve, one end of the first electromagnetic valve and one end of the second electromagnetic valve are connected in parallel and then serve as a first interface, and are connected to the outlet of the condenser 20, the other end of the first electromagnetic valve serves as a second interface, and is connected to the inlet of the first reservoir 51, and the other end of the second electromagnetic valve serves as a third interface and is connected to the inlet of the high pressure chamber of the second reservoir 52.
Optionally, the first throttling device 41 includes a first electronic expansion valve, or a first electromagnetic valve and a first capillary tube connected in series; the second throttling means 42 comprises a second solenoid valve, or a second solenoid valve and a second capillary tube connected in series.
Optionally, the evaporator 30 includes a first evaporator 30 and a second evaporator 30; the inlet of the first evaporator 30 is connected with the outlet of the low-pressure cavity of the second liquid storage device 52; the inlet of the second evaporator is connected to the outlet of the second throttling means 42; the outlet of the first evaporator 30 and the outlet of the second evaporator 30 are both connected to the suction port of the compressor 10.
By adopting the scheme, the switching communication device 80, the first liquid storage device 51 and the second liquid storage device 52 are arranged, and mixed refrigerants with different boiling points can circulate in the refrigerating system according to the requirements of different refrigerating capacities, so that the refrigerating system is low in energy consumption and high in refrigerating capacity by using the small-displacement compressor 10.
The embodiment of the invention also provides refrigeration equipment comprising the refrigeration system.
Optionally, the compressor 10 and the first accumulator 51 are both disposed in a press cabin of the refrigeration system; the second accumulator 52 is disposed in the insulation of the refrigeration system.
Optionally, the refrigeration device is a refrigerator.
By adopting the scheme, the switching communication device 80, the first liquid storage device 51 and the second liquid storage device 52 are arranged, and mixed refrigerants with different boiling points can circulate in the refrigerating system according to the requirements of different refrigerating capacities, so that the refrigerating system is low in energy consumption and high in refrigerating capacity by using the small-displacement compressor 10. When the required refrigerating capacity is small, the refrigerating equipment can meet the low-load requirement in stable operation by using the system, and the power consumption is low; when the refrigerating capacity is required to be large, the refrigerating equipment can realize rapid cooling by using the system.
The present invention is not limited to the structures that have been described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (11)
1. A refrigerating system comprises a compressor, a condenser connected with an exhaust port of the compressor, and an evaporator connected with an air suction port of the compressor, wherein the condenser is provided with a condensing fan;
a first interface of the switching communication device is connected with an outlet of the condenser, a second interface of the switching communication device is connected with an inlet of the first liquid storage device, and a third interface of the switching communication device is connected with an inlet of a high-pressure cavity of the second liquid storage device;
the air outlet port of the first liquid reservoir is connected with the high-pressure cavity inlet of the second liquid reservoir; the outlet of the first reservoir is connected to the inlet of the evaporator by a first throttling device;
the outlet of the high-pressure cavity of the second liquid reservoir is connected to the inlet of the evaporator through a second throttling device; the outlet of the low-pressure cavity is connected with the inlet of the evaporator through a pipeline;
refrigerant is introduced into the refrigeration system, and the refrigerant comprises a first refrigerant and a second refrigerant with different boiling points;
when the refrigerating system operates in a low refrigerating capacity mode, the first interface of the switching communication device is communicated with the second interface;
and when the refrigerating system operates in a large refrigerating capacity mode operation mode, the first interface of the switching communication device is communicated with the third interface.
2. A refrigeration system as set forth in claim 1 wherein said second accumulator is further provided with a low pressure chamber connected in series between said first throttling means and an inlet of said evaporator.
3. The refrigerant system as set forth in claim 1, further including control means for executing operating instructions; the control device includes:
a first unit for controlling the first throttling device according to the operation instruction;
the second unit is used for controlling the second throttling device according to the operation instruction;
a third unit for controlling the switching communication device.
4. A refrigeration system as set forth in claim 3 wherein said control is specifically configured to:
when the operation instruction is a small refrigerating capacity mode operation instruction, the first unit controls the first throttling device to throttle, and the second unit controls the second throttling device to close; the third unit controls the conduction of the first interface and the second interface of the switching communication device;
when the operation instruction is a large refrigerating capacity mode operation instruction, the first unit controls the first throttling device to be closed, and the second unit controls the second throttling device to be throttled; and the third unit controls the conduction of the first interface and the third interface of the switching communication device.
5. The refrigerant system as set forth in claim 4, wherein said control is further for:
when the operation instruction is a refrigerant separation mode operation instruction, the first unit controls the first throttling device to be closed, the second unit controls the second throttling device to be throttled, and the third unit controls the first section of the switching and communicating device to be communicated with the second interface.
6. The refrigeration system of claim 1, wherein a check valve is disposed between the outlet port of the first accumulator and the inlet of the high pressure chamber of the second accumulator, and the check valve flows from the outlet port of the first accumulator to the inlet of the high pressure chamber of the second accumulator.
7. The refrigeration system as recited in claim 1 wherein a first return conduit is provided between an outlet of said first accumulator and said first throttling means, and a return conduit is provided between said evaporator and said compressor suction; the first heat return pipeline exchanges heat with the air return pipeline.
8. The refrigeration system as recited in claim 7 wherein a second heat return conduit is provided between a high pressure chamber outlet of the second accumulator and the second throttling device; the second heat return pipeline exchanges heat with the air return pipeline.
9. A refrigeration system as set forth in claim 1 wherein said first accumulator is provided with an electrical heating tape.
10. The refrigeration system according to claim 9, wherein the high pressure chamber of the second accumulator is provided with an electric heating tape; the pipeline of the low-pressure cavity is arranged at the top of the high-pressure cavity.
11. A refrigeration apparatus comprising a refrigeration system as claimed in any one of claims 1 to 10.
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| CN201910027564.7A CN111435040A (en) | 2019-01-11 | 2019-01-11 | Refrigerating system and refrigerating equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910027564.7A CN111435040A (en) | 2019-01-11 | 2019-01-11 | Refrigerating system and refrigerating equipment |
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| CN111435040A true CN111435040A (en) | 2020-07-21 |
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| CN201910027564.7A Pending CN111435040A (en) | 2019-01-11 | 2019-01-11 | Refrigerating system and refrigerating equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112815559A (en) * | 2021-01-05 | 2021-05-18 | 中电建路桥集团有限公司 | Refrigerant cycle device and refrigerant cycle control method |
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Application publication date: 20200721 |