CN115654762A - Double-pipe ammonia refrigerating system - Google Patents

Abstract

The invention discloses a double-tube ammonia refrigeration system, which comprises a compressor, a condenser, a liquid storage device and a regenerative evaporator system which are sequentially connected into a ring through pipelines; the compressor give vent to anger the end with the inlet end intercommunication of condenser, the play liquid end of condenser with the input intercommunication of reservoir, the output of reservoir with the feed liquor end intercommunication of regenerative evaporator system, regenerative evaporator system's exhaust end with the suction end intercommunication of compressor. The invention has simple structure and reasonable design, reduces the ammonia charging amount of the system, reduces the power energy consumption of the compressor, reduces the volume of the liquid storage device, reduces the leakage risk of ammonia liquid and ammonia gas, and reduces the construction cost and the operation cost of the pipeline.

Description

Double-pipe ammonia refrigerating system

Technical Field

The invention relates to the technical field of refrigeration systems, in particular to a double-tube type ammonia refrigeration system.

Background

The ammonia refrigeration system is the most commonly adopted refrigeration system in large and medium refrigeration systems (mainly industrial and commercial refrigeration) at present due to the advantages of high energy efficiency, low price, high heat transfer performance, environmental protection and the like. However, the conventional ammonia refrigeration system generally has complex pipelines, needs a large-capacity ammonia storage tank, needs strict safety inspection and supervision, and increases the production and operation cost; the complex pipeline is easy to have the risk of ammonia leakage, and causes the potential safety hazard of explosion.

Disclosure of Invention

The present invention is directed to a dual-tube ammonia refrigeration system to solve the above problems in the prior art. In order to achieve the purpose, the invention provides the following technical scheme:

a double-tube ammonia refrigeration system comprises a compressor, a condenser, a liquid storage device and a regenerative evaporator system which are sequentially connected into a ring through pipelines; the compressor give vent to anger the end with the inlet end intercommunication of condenser, the play liquid end of condenser with the input intercommunication of reservoir, the output of reservoir with the feed liquor end intercommunication of regenerative evaporator system, regenerative evaporator system's exhaust end with the suction end intercommunication of compressor.

Further, the compressor is provided in one or a plurality in parallel through a pipe.

Further, a suction valve is arranged at the suction end of the compressor.

Further, the condenser is arranged in one or a plurality of parallel pipelines.

The invention has the beneficial effects that: the invention has simple structure and reasonable design, reduces the ammonia charging amount of the system, reduces the power consumption of the compressor, reduces the volume of the liquid accumulator, reduces the leakage risk of ammonia liquid and ammonia gas, and reduces the construction cost and the operation cost of the pipeline.

Drawings

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

FIG. 1 is a schematic view of the present invention.

It is to be noted that the drawings are not necessarily drawn to scale but are merely shown in a schematic manner which does not detract from the understanding of the reader.

Detailed Description

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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "center", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments and are not intended 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 to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable 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. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Moreover, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the specific type and configuration may or may not be the same), and are not used to indicate or imply the relative importance or number of the indicated devices, elements, or components. "plurality" means two or more unless otherwise specified.

It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

As shown in fig. 1, a double-tube ammonia refrigeration system comprises a compressor 1, a condenser 2, a liquid accumulator 3 and a regenerative evaporator system 4 which are sequentially connected into a ring through pipelines; the air outlet end of the compressor 1 is communicated with the air inlet end of the condenser 2, the liquid outlet end of the condenser 2 is communicated with the input end of the liquid storage device 3, the output end of the liquid storage device 3 is communicated with the liquid inlet end of the regenerative evaporator system 4, and the exhaust end of the regenerative evaporator system 4 is communicated with the suction end of the compressor 1.

Specifically, when the double-tube ammonia refrigeration system in the embodiment of the application works, the compressor 1 compresses low-pressure ammonia gas into high-pressure ammonia gas, and then the high-pressure ammonia gas is conveyed from the gas outlet end to the gas inlet end of the condenser 2 through the high-pressure ammonia gas tube; high-pressure ammonia enters the condenser 2, is converted into high-pressure ammonia liquid through heat release condensation, and then is conveyed to the input end of the liquid storage device 3 from the liquid outlet end through the high-pressure liquid pipe; the liquid storage device 3 is used as storage equipment for storing ammonia liquid; the high-pressure ammonia liquid of the liquid storage device 3 is conveyed to the liquid inlet end of the regenerative evaporator system 4 from the output end through a high-pressure liquid pipe; the high-pressure ammonia liquid is subjected to cold-heat exchange through a regenerative evaporator system 4 to realize the refrigeration and defrosting effects and then is converted into low-pressure ammonia gas; and finally, low-pressure ammonia gas is conveyed from the exhaust end of the regenerative evaporator system 4 to the suction end of the compressor 1 through a low-pressure ammonia gas pipe, is sucked back by the compressor 1 and is compressed again to enter the next refrigeration cycle.

It should be noted that the regenerative evaporator system 4 adopts a regenerative evaporator system disclosed in chinese patent No. CN 217541143U, and the regenerative evaporator system 4 includes a three-way expansion valve and an evaporator, and the three-way expansion valve is located at the front end of the evaporator. In the cooling mode: the high-pressure ammonia liquid is throttled and depressurized by an expansion pipe of the three-way expansion valve to become low-pressure ammonia liquid, the low-pressure ammonia liquid enters an evaporator for refrigeration, the low-pressure ammonia liquid is vaporized by absorbing heat in the evaporator to become low-pressure ammonia gas, and the low-pressure ammonia gas is sucked back by a compressor through a low-pressure ammonia gas pipe and is compressed again to enter the next cycle. During the defrosting mode: the high-pressure ammonia liquid directly enters an evaporator through a bypass pipe of the three-way expansion valve to carry out hydrothermal defrosting; the defrosted ammonia liquid is further cooled and then enters other evaporators through a three-way valve and a low-temperature liquid pipe to absorb heat and refrigerate; the low-pressure low-temperature ammonia liquid is vaporized into low-pressure ammonia gas after absorbing heat in the evaporator; then sucked back by the compressor 1 through the low-pressure ammonia pipe to be recompressed into the next cycle. This regenerative evaporator system 4 adopts high temperature high pressure liquid to defrost the evaporimeter, need not additionally to heat and can cool off this liquid when defrosting, and cooling liquid gets into in another evaporimeter that is in the refrigeration mode, and this evaporimeter is being in the refrigeration mode, makes the cold volume that can retrieve ice, and then reduces the consumption of refrigeration volume, has obvious energy-conserving effect. Simultaneously, this regenerative evaporator system 4 only need match connect the liquid inlet end the high-pressure liquid pipe and the exhaust end the low pressure ammonia pipe can, the mounting means is simple, greatly reduced the ammonia leakage rate of large capacity ammonia storage tank.

In the conventional ammonia refrigeration system adopting hot gas defrosting, hot gas is required to enter an evaporator system from a compressor through a hot gas inlet pipe for defrosting in a defrosting mode, and the hot ammonia gas releases heat and becomes ammonia liquid to enter other evaporators through a liquid discharge pipe for refrigeration during defrosting.

Compared with the conventional ammonia refrigeration system adopting hot gas defrosting, the double-pipe ammonia refrigeration system has the advantages that the structure is simple, the design is reasonable, the hot gas inlet pipe and the hot gas discharge pipe are saved, the ammonia amount required in the pipeline is correspondingly reduced, and therefore, the ammonia charging amount of the whole system is reduced, the power energy consumption of a compressor can be reduced, the size of a liquid accumulator can be greatly reduced, and a conventional large-capacity ammonia storage tank is omitted; meanwhile, the ammonia liquid and ammonia gas leakage risk at the connecting part of the two pipelines is reduced, and the pipeline construction cost and the operation cost are reduced.

Further, the compressor 1 is provided in plurality in parallel by a pipe. It should be noted that the compressor of the present invention may be arranged as one or multiple compressors connected in parallel through a pipeline to meet the load of the double-pipe ammonia refrigeration system. For convenience of description, the embodiments of the present application take a plurality of compressors connected in parallel through a pipeline as an example.

Further, a suction valve 5 is provided at a suction end of the compressor 1.

Further, the condenser 2 is provided in plurality in parallel by a pipe. It should be noted that the condenser of the present invention may be arranged as one or a plurality of condensers connected in parallel through a pipeline to meet the load of the double-pipe ammonia refrigeration system. For convenience of explanation, the embodiments of the present application take a plurality of condensers connected in parallel through a pipeline as an example.

It should also be noted that, in the case of the embodiments of the present invention, features of the embodiments and examples may be combined with each other to obtain a new embodiment without conflict.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention in any way, and the scope of the present invention should be determined by the scope of the appended claims. Although the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention.

Claims (4)

1. A double-pipe ammonia refrigeration system, characterized in that: comprises a compressor, a condenser, a liquid storage device and a regenerative evaporator system which are sequentially connected into a ring through pipelines; the compressor give vent to anger the end with the inlet end intercommunication of condenser, the play liquid end of condenser with the input intercommunication of reservoir, the output of reservoir with the feed liquor end intercommunication of regenerative evaporator system, regenerative evaporator system's exhaust end with the suction end intercommunication of compressor.

2. The dual-tube ammonia refrigeration system of claim 1, wherein: the compressors are arranged in one or a plurality of parallel pipelines.

3. The dual-tube ammonia refrigeration system according to claim 1 or 2, wherein: the suction end of the compressor is provided with a suction valve.

4. The dual-tube ammonia refrigeration system of claim 1, wherein: the condenser is arranged in one or a plurality of parallel pipelines.

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