CN103017424A - Plate type condenser - Google Patents

Abstract

The invention discloses a plate condenser, which comprises a condensation zone (1), the condensation zone (1) is formed by a plurality of condensation heat exchange fins (11) closely connected, and is used to realize the cooling medium (A) and cooling Heat exchange of liquid (B); subcooling zone (2), the supercooling zone (2) is formed by a plurality of subcooling heat exchanging fins (21) closely connected to realize passing through the condensation zone (1) The heat exchange between the final refrigerant medium (A) and the subcooled fluid (C) throttled by the throttle valve; the condensation zone (1) and the supercooling zone (2) pass through a deflector (3) isolation, the guide plate (3) is provided with guide grooves (31) for guiding the refrigerant medium (A) condensed in the condensation zone (1) to the supercooling zone (2) ), the cross-sectional area of the diversion groove (31) is approximately equal to the flow area of the diversion interface (32) at both ends. The condenser solves the problems that the existing condenser occupies a large space and has low heat exchange efficiency.

Description

A plate condenser

technical field

The invention belongs to the technical field of design and manufacture of heat exchangers, in particular to a plate condenser.

Background technique

At present, there are more and more high-rise buildings and hotel business buildings in the city. As we all know, in order to bring people a more comfortable environment in public buildings, most large public buildings are equipped with central air conditioners, which can control the room temperature. Within a certain temperature range, people have the feeling of spring in the four seasons in the building. As an important part of the central air conditioner, the condenser is a heat exchanger used to cool and liquefy the high-temperature refrigerant vapor compressed by the compressor.

The condenser of the central air conditioner that is common in the market basically uses a tube heat exchanger, and the refrigerant exchanges heat with the outside water through the heat exchange tubes arranged in the heat exchanger shell to achieve refrigeration. In order to further improve the condensation efficiency of the condenser, a supercooling tube is generally provided at the liquid outlet end of the tube condenser to ensure further cooling of the liquid discharged from the condenser. However, in this method, the supercooling The cooling source of the tube is the cooling water entering from the outside, limited by the cooling source (cooling water temperature is about 30°C), the subcooling degree of this condenser is relatively low, and the heat exchange efficiency is relatively low. Since this kind of subcooling tube can only be connected to the cooling water required by the national standard and cannot be connected to other cold media; therefore, as a new technical trend, in the application of tube condensers, a plate-type filter is often installed on the outlet pipe section of the condenser. The cooler uses the plate subcooler to realize the heat exchange between the refrigerant medium and the low-temperature refrigerant medium after throttling, and further improves the subcooling degree of the condenser, so that the cooling capacity of the entire unit can be increased at the same time. However, this split type condenser has a very complex structure, many parts, troublesome installation, large overall volume, and relatively large space occupation, which makes the entire central air conditioner occupy a relatively large area.

In order to solve the problem of complex structure and high duty ratio of the condenser, US patent document US2010/0065262Al discloses a plate heat exchanger, which can be used as a condenser. Compared with the tubular heat exchanger, the structure is simple and the floor space is small; however, it does not have a subcooling device for further cooling the condenser, so the condensation efficiency of this condenser cannot meet the requirements. However, in the prior art, the addition of a subcooler to this plate-type condenser is also a split structure connected by pipelines. Its footprint still cannot meet the requirements of a compact central air-conditioning system.

Chinese patent document CN2604667Y discloses a plate heat exchanger integrating preheating, sterilization and cooling. In order to solve the problems of insufficient energy utilization, waste of water and large investment in equipment existing in the prior art when two sets of independent equipment are used for simultaneous operation in disinfection and sterilization and rapid cooling. The heat exchanger is a multi-plate heat exchanger tightly connected, and a deflector is added in the middle to form a waste heat exchange area and a high-temperature sterilization area. It consists of a preheating sheet 1, a disinfection sheet 4, and a cooling sheet 2. Composed of deflector 3 and high-temperature heating sheet 5, the cold liquid is preheated and sterilized, and then flows out after releasing heat in the cooling sheet. The high-temperature medium can use hot water or superheated steam to release heat in the heating sheet, because they are closely connected to heat I can fully exchange it. However, the internal shape of the deflector 3 in the plate heat exchanger is a parallelogram. When the fluid passes through the deflector 3, the fluid flow rate will be too small, which will eventually lead to low heat exchange efficiency, which cannot meet the requirements of the condenser in the central air conditioner. Requirements for heat transfer efficiency.

Contents of the invention

Therefore, the technical problem to be solved by the present invention is that the existing condenser occupies a large space and has low heat exchange efficiency, and further provides a condenser with a small duty cycle and high heat exchange efficiency.

In order to solve the above-mentioned technical problems, the plate condenser of the present invention includes a condensation zone, and the condensation zone is formed by a plurality of condensation heat exchange fins closely connected to realize the heat exchange between the refrigeration medium and the cooling liquid; the supercooling zone, The supercooling zone is formed by a plurality of supercooling heat exchange fins closely connected to realize the heat exchange between the refrigerant medium and the low-temperature coolant after passing through the condensation zone; the condensation zone and the supercooling zone pass through a The guide plate is isolated, and the guide plate is provided with a guide groove for guiding the refrigerant medium condensed in the condensation zone to the supercooling zone, and the cross-sectional area of the guide groove is the same as The flow areas of the diversion interfaces at both ends are approximately equal.

That is to say, the cross-sectional area of the diversion groove can be selected to be completely equal to the flow area of the diversion interfaces at both ends, or slightly larger or smaller than the flow area of the diversion interfaces at both ends. The range of slightly larger or slightly smaller is defined as the difference between the cross-sectional area of the diversion groove and the flow area of the diversion interfaces at both ends is no more than 10%, preferably no more than 5%.

In the above-mentioned plate condenser, the guide groove is shaped in a streamlined shape.

In the above-mentioned plate condenser, the condensing heat exchange fins and the subcooling heat exchange fins are formed with guide holes for conducting the heat exchange medium and a plurality of regularly arranged heat exchange grooves on the plate surface.

In the above-mentioned plate condenser, the heat exchange grooves are in a herringbone shape, and the adjacent heat exchange grooves are arranged in a positive herringbone shape and an inverted herringbone shape.

In the above-mentioned plate condenser, the adjacent condensing heat exchange fins and the guide holes (112) of the subcooling heat exchange fins are sealed and connected by sealing rubber pads.

In the above-mentioned plate condenser, heat exchange end covers are arranged at both ends of the condenser.

In the above-mentioned plate condenser, the heat exchange end cover, the condensing heat exchange fins, the deflector plate, and the subcooling heat exchange fins are welded and connected.

In the above-mentioned plate condenser, the subcooled fluid enters the economizer interface of the compressor after passing through the subcooling zone, and supplies air to the compressor to increase enthalpy.

The above technical solution of the present invention has the following advantages compared with the prior art:

(1) The condenser of the present invention uses plate-type heat exchange fins to achieve heat exchange, and it adds a supercooling zone, which is separated from the condensation zone by a deflector. The structure of the entire condenser is compact, compared with the existing The floor area of the split condenser is relatively low; at the same time, the cross-sectional area of the guide groove provided by the guide plate of the present invention is equal to the cross-sectional area of the interface at both ends, so that the flow rate of the refrigerant medium is stable at the guide plate. , the heat transfer efficiency is greatly improved.

(2) A plurality of regularly arranged heat exchange grooves are provided on the heat exchange plate of the present invention for the flow of the heat exchange medium. The heat exchange grooves are in the shape of a herringbone. The heat exchange efficiency between the heat exchange plates of the present invention is further improved.

(3) When the subcooled fluid throttled by the throttle valve passes through the subcooling zone in the present invention, it can realize the overheating of the throttled refrigerant medium, directly compensate for the compressor, and increase the cooling capacity of the unit. Moreover, all the functions mentioned above are integrated into one body, which is convenient for processing and installation.

Description of drawings

In order to make the content of the present invention more easily understood, the present invention will be described in further detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings, wherein

Fig. 1 is the structural representation of plate condenser of the present invention;

Figure 2 is a perspective view of the deflector.

The reference signs in the figure represent:

1-Condensation area, 11-Condensation heat exchange fins, 2-Supercooling area, 21-Supercooling heat exchange fins, 112-Direction hole, 121-Heat exchange groove, 3-Deflector plate, 31-Direction concave Groove, 32-flow guide interface, 4-heat exchange end cover, A-refrigerant medium, B-coolant, C-supercooled fluid.

Detailed ways

In the following, the present invention will be further described by using the following embodiments in conjunction with the accompanying drawings.

Fig. 1 and Fig. 2 are plate condensers of the present invention. The plate condenser includes a condensation zone 1, which is formed by a plurality of condensation heat exchange fins 11 closely connected to realize heat exchange between a refrigerant medium A and a cooling liquid B; a supercooling zone 2, the supercooling zone 2 Zone 2 is formed by a plurality of subcooling heat exchange fins 21 closely connected to realize heat exchange between the refrigerant medium A passing through the condensation zone 1 and the subcooling fluid C throttled by the throttle valve; the condensation Zone 1 is isolated from the supercooling zone 2 by a deflector 3, and the deflector 3 is provided with a cooling medium A for guiding the refrigerant medium A condensed in the condensation zone 1 to the supercooling zone 2. The guide groove 31, the cross-sectional area of the guide groove 31 is equal to the flow area of the guide interface 32 at both ends, so that the flow rate of the refrigerant medium is stabilized at the guide plate, and the heat exchange efficiency is greatly improved.

In this embodiment, the refrigerating medium A is Freon, the cooling liquid B is water, brine and other related media, and the supercooled fluid C is the refrigerating medium throttled by a throttle valve. The subcooled fluid C enters the economizer interface of the compressor after passing through the subcooling zone 2, and supplies air to the compressor to increase enthalpy.

The condensing heat exchange fins 11 and the subcooling heat exchange fins 21 are formed with guide holes 112 for conducting the heat exchange medium and a plurality of regularly arranged heat exchange grooves 121 . The heat exchange grooves 121 are in a herringbone shape, and the adjacent heat exchange grooves 121 are arranged in a positive herringbone shape and an inverted herringbone shape. The heat exchange plate has a large heat exchange area, and the heat exchange efficiency is further improved.

Adjacent condensing heat exchanging fins 11 and the guide holes 112 of the subcooling heat exchanging fins 21 are sealed and connected by sealing rubber pads.

Both ends of the condenser are provided with heat exchange end covers 4 , and the heat exchange end covers 4 , the condensation heat exchange fins 11 , the deflectors 3 , and the subcooling heat exchange fins 21 are welded and connected.

The working process of the plate condenser is as follows:

The cooling liquid B enters from the heat exchange end cover 4 into the condensation heat exchange fins 11 arranged at intervals in the condensation zone 1; the refrigerant A enters from the heat exchange end cover 4 into the In the condensation heat exchange fin 11 adjacent to the cooling liquid B in the condensation zone 1, heat exchange is realized; The cold zone 2 exchanges heat with the subcooled fluid C throttled by the throttle valve, and finally discharges through the heat exchange end cover 4 of the supercooled zone 2 .

In other embodiments, the diversion groove 31 is shaped into a streamline shape, and its cross-sectional area is set to be slightly larger or slightly smaller than the flow area of the diversion interface 32 at both ends, and the range slightly larger or smaller is defined as the guide The cross-sectional area of the groove is no more than 10%, preferably no more than 5%, compared with the flow area of the diversion interface at both ends.

Apparently, the above-mentioned embodiments are only examples for clear description, rather than limiting the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And the obvious changes or changes derived therefrom are still within the scope of protection of the present invention.

Claims (8)

1. plate-type condenser, it comprises

Condensing zone (1), described condensing zone (1) closely is formed by connecting by a plurality of condensing heat-exchange sheets (11), is used for realizing the heat exchange of refrigerant (A) and cooling fluid (B);

Cross cold-zone (2), the described cold-zone (2) of crossing closely is formed by connecting by the cold heat exchanger fin of a plurality of mistakes (21), is used for realizing through the refrigerant (A) behind the described condensing zone (1) and the heat exchange of crossing cold fluid (C) after the choke valve throttling; It is characterized in that:

Described condensing zone (1) is isolated by a deflector (3) with the described cold-zone (2) of crossing, described deflector (3) is provided with for the condensed described refrigerant of described condensing zone (1) (A) being guided to the described diversion groove (31) of crossing cold-zone (2), and the area of passage of the water conservancy diversion interface (32) at the sectional area of described diversion groove (31) and two ends about equally.

2. plate-type condenser according to claim 1 is characterized in that:

The sectional area of described diversion groove (31) is set to equate fully or compares to differ up and down be no more than 10% with the area of passage of the water conservancy diversion interface (32) at two ends.

3. plate-type condenser according to claim 1 and 2 is characterized in that:

Form pod apertures (112) and a plurality of regularly arranged heat exchange groove (121) for the conducting heat transferring medium on the plate face of described condensing heat-exchange sheet (11) and the cold heat exchanger fin of described mistake (21).

4. plate-type condenser according to claim 3 is characterized in that:

Described heat exchange groove (121) is herringbone, and adjacent described heat exchange groove (121) is positive herringbone and the setting of falling the herringbone.

5. the described plate-type condenser of any one according to claim 1-4 is characterized in that:

Adjacent described condensing heat-exchange sheet (11) and the described pod apertures (112) of the cold heat exchanger fin of described mistake (21) locate to adopt seal gasket to be connected and sealed.

6. the described plate-type condenser of any one according to claim 1-5 is characterized in that:

The two ends of described condenser arrange heat exchange end cap (4).

7. plate-type condenser according to claim 6 is characterized in that:

Be welded to connect between described heat exchange end cap (4), described condensing heat-exchange sheet (11), described deflector (3), the cold heat exchanger fin of described mistake (21).

8. the described plate-type condenser of any one according to claim 1-7 is characterized in that:

Enter into the economizer interface of compressor after described excessively cold fluid (C) process described excessively cold-zone (2), tonifying Qi increases enthalpy to compressor.

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