CN113654375A - Principle of channel-type parallel flow three-medium heat exchanger - Google Patents

Abstract

The patent of the present invention provides a three-medium heat exchange system structure design field. The heat exchange structure of the channel-type parallel flow three-medium heat exchanger is to isolate the adjacent two channel tubes of the multi-channel metal flat tube into parallel flow channels of two different media, which are used to flow two different refrigerants. medium (medium 1, medium 2), and then install several multi-channel flat tubes in the space in the shell and tube heat exchanger in layers, and the space in the shell and tube heat exchanger is used for the flow of the flowing medium 3. When in use, the two mediums of medium 1 and medium 2 can directly conduct heat conduction and heat exchange through the two adjacent flat tubes of the channel, and can also exchange heat with the medium 3 outside the multi-channel flat tube at the same time or separately, so as to realize the three-media Any two mediums in the system: medium 1 and medium 2, medium 2 and medium 3, and medium 1 and medium 3 can exchange heat with each other. The principle structure is shown in Figure 1. In order to improve its heat exchange efficiency, fins can be added inside and outside the multi-channel flat tube to increase its heat exchange area.

Description

Channel type parallel flow three-medium heat exchanger principle

Technical Field

The invention provides a heat exchange mode of a system in the heat exchange field, and the heat exchange structure of a channel type parallel flow three-medium heat exchanger is characterized in that two adjacent channel tubes of a channel type heat exchange flat tube are isolated to form two different medium channels for flowing two different refrigerant media (medium 1 and medium 2), then a plurality of channel type flat tubes are installed in a space in a shell tube in a layered mode, and the space in the shell tube is used for flowing water or glycol and other cold carrying media (medium 3). When the heat exchanger is used, two refrigerant media can directly exchange heat through two adjacent edges of the channel flat pipes and the outer heat-conducting metal shells of the two channels, and can also exchange heat through secondary refrigerants such as water or ethylene glycol and the like in the outer shell pipes of the channel flat pipes simultaneously or independently, so that any two media in the three media can be realized: the media 1 and 2, the media 2 and 3, and the media 1 and 3 can exchange heat with each other, and the principle structure is shown in the attached drawing 1. In order to improve the heat exchange efficiency, fins can be added on the inner side and the outer side of the channel flat tubes to increase the heat exchange area of the channels.

Background

Ordinary three medium heat exchangers on the market at present can generally realize that two fluorine ways carry out the heat exchange in the water route respectively, but keep apart by water between fluorine and the fluorine and can not direct heat transfer, even adopt coupling heat exchange efficiency extremely low. The invention redistributes the internal space structure of the shell-and-tube heat exchanger, so that not only can heat exchange be carried out between fluorine and water, but also the heat exchange can be fully carried out between fluorine and fluorine. The requirement of a user on the working condition of the air conditioner is continuously improved in the using process of the air conditioning system, the simple refrigerating or heating working condition of the original air conditioning system cannot meet the requirement, and the high-temperature heat storage or low-temperature ice storage working condition of the electricity price at the valley is needed to be utilized. Although the existing cascade high-temperature hot water unit can prepare high-temperature hot water, the existing cascade high-temperature hot water unit is only suitable for a valley price heat accumulation heating mode in winter if being used in the field of air conditioners, can not directly heat and refrigerate, and refrigeration or ice accumulation in summer also needs separate refrigeration equipment, thereby causing great resource waste. The existing air conditioning unit with the double-compressor system can be used for conventional refrigeration and heating or low-temperature ice storage, but cannot be suitable for a valley electricity price heat storage and heating mode in winter. The three-medium shell and tube heat exchanger disclosed by the invention can effectively exert the utilization rate of a multi-compressor unit, integrates the advantages of the existing cascade system unit and the advantages of the existing double-compressor system unit, and the novel system can be used for high-temperature heat storage and can also be used for working conditions such as ice storage or direct heating and refrigeration, so that the novel system can meet all heating and ventilation requirements in the working time all year around, the early investment is greatly saved, and the utilization rate of equipment is improved.

Disclosure of Invention

The invention provides a structural principle for manufacturing a three-medium shell-and-tube heat exchanger by utilizing a channel type parallel flow metal flat tube (metal flat tube for short) in the field of heat exchange, and the structure solves the problem that any two different media among three media can realize heat exchange as required in the heat exchange process of the three-medium heat exchanger.

The invention relates to a shell-and-tube heat exchanger which consists of a shell tube (1), a parallel flow flat tube (2) and corresponding inlets and outlets. A plurality of channels of parallel flow metal flat pipes are used for replacing a conventional heat exchange pipe in the shell and pipe heat exchanger, the metal flat pipes are of a porous side-by-side structure, adjacent channels are isolated by partition plates, and each channel can be regarded as an independent pipeline. This patent circulates two kinds of different media (medium 1, medium 2) between adjacent passageway, and various different media converge the chamber in the difference at flat tubular metal resonator both ends and gather together, just can circulate two kinds of media simultaneously among each flat tubular like this to just can be through flat tubular intermediate bottom and pipeline wall both sides heat conduction abundant heat transfer between medium 1 and the medium 2. The two media in the metal flat tube can flow in the same direction or in the opposite direction, and the corresponding flow direction is determined according to different working condition requirements.

A plurality of metal flat pipes are gathered in a square shell and tube container, the corresponding structures are arranged, and then gaps among the multi-channel flat pipes in the shell are filled with flowing media 3, so that heat exchange can be carried out between the media 1 and the media 3, and between the media 2 and the media 3, and sufficient heat exchange can be carried out between any two of the three media. The principle refers to the attached figure 1, wherein 1, a multi-channel parallel flow metal flat pipe, 2, and a shell and tube heat exchanger shell.

The three-medium heat exchanger consists of three medium pipelines, including a first medium inlet pipe, a first medium outlet pipe, a second medium inlet pipe, a second medium outlet pipe, a third medium inlet pipe, a third medium outlet pipe and a shell and tube container. The first medium and the second medium flow in the separated channels of the same multi-channel flat metal pipe, and the third medium flows in the shell and tube container outside a plurality of flat metal pipes.

The invention can be used for solving the problem that the existing air conditioning system realizes flexible switching among different working conditions and meets different temperature output requirements of different working conditions. The three-medium heat exchanger is arranged between the air conditioning units with the double compressor systems to replace the original double-system heat exchanger, can realize the functions of refrigerating and heating or ice storage by the parallel output of the double units in a fluorine-water heat exchange mode, and can also realize the overlapping operation of the air conditioning units with the double compressor systems and output high-temperature hot water by fluorine-fluorine heat exchange. Under the condition that the two sets of compressor units are combined in different modes, different working condition outputs can be realized.

Description of the drawings fig. 1 is a structural principle of a channel type parallel flow three-medium heat exchanger and a distribution principle diagram of three different media.

Claims (5)

1. The channel-type parallel flow three-medium heat exchanger of the present invention is provided with three groups of inlet and outlet interface pipes for different media, the internal heat exchange pipes are composed of channel-type metal flat tubes, the outer shell is composed of metal tube shells, and the Materials include but are not limited to various thermally conductive metals such as copper, iron, aluminum and their alloys. 2. The patent of the present invention provides a three-medium heat exchanger based on multi-channel parallel flow metal flat tubes, which is characterized in that the heat exchanger is a shell-and-tube structure, and the pipelines used inside the shell-and-tube are micro-channel or multi-channel metal flat tubes. , each metal flat tube contains no less than two parallel passages. 3. A three-medium heat exchanger based on multi-channel metal flat tubes, characterized in that the inner adjacent channels of each flat tube are isolated from each other, and different media (medium 1) flow between adjacent metal channel tubes. , medium 2), the confluence mode of different media of adjacent metal channel pipes does not affect the protection scope of this patent. 4. This patent is based on a multi-channel flat tube three-medium heat exchanger, which is characterized in that the outer periphery of the metal flat tube and the interior of the shell and tube are filled with medium 3, and medium 3 and any two of medium 1 and medium 2 in the metal flat tube are filled. Medium: medium 1 and medium 2, medium 2 and medium 3, medium 3 and medium 1, all can exchange heat with each other, medium 1, medium 2, medium 3 include but are not limited to water, oil, fluorine refrigerant, or It is any other gas or liquid fluid that can be used for heat exchange. 5. The present invention does not set specific shape restrictions, and any adjustments to the shape and arrangement based on this principle are within the scope of protection of this patent.

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