CN211011999U

CN211011999U - Double-sided plate tube heat exchanger

Info

Publication number: CN211011999U
Application number: CN201921469307.0U
Authority: CN
Inventors: 陈阿勇; 陈伟文; 黄运松; 梁志辉; 麦嘉强
Original assignee: Mgwide LLC
Current assignee: Mgwide LLC
Priority date: 2019-09-04
Filing date: 2019-09-04
Publication date: 2020-07-14
Anticipated expiration: 2029-09-04

Abstract

The utility model discloses a double-sided plate pipe heat exchanger, which can change the flow path direction of a refrigerant when serving as an evaporator or a condenser by controlling a first check valve and a second check valve; when the plate tube is used as an evaporator, the double-panel tube is in a parallel operation state, so that the pressure drop is reduced; when as the condenser, the heat transfer coil pipe on two sides realizes series connection operation, and the convection heat transfer coefficient promotes, and heat transfer performance obtains great improvement, and this utility model is used for the indirect heating equipment field.

Description

Double-sided plate tube heat exchanger

Technical Field

The utility model relates to a heat exchange equipment field especially relates to a two-sided board pipe heat exchanger.

Background

When the existing double-sided plate pipe heat exchanger is used in a heat pump unit, the same double-sided plate pipe heat exchanger is used as a condenser in a refrigeration mode and used as an evaporator in a heating mode. According to the conventional climatic conditions, when the evaporator is used as a condenser, the evaporation temperature is high, the evaporation pressure is high, the condensation pressure is correspondingly increased, and the density is high. When the evaporator is used, the evaporation temperature is low, the evaporation pressure is lower, and the density is low.

Patent CN206399212U describes a double-sided plate-tube heat exchanger, in which the pressure at the inlet position of the heat exchange tube when it is used as a condenser is at least 4 times higher than the pressure at the outlet position when it is used as an evaporator, so that the flow rate when it is used as the outlet of the evaporator and the flow rate when it is used as the inlet of the condenser are also 4 times higher, resulting in a larger pressure drop and a large influence on the mass flow and the heat exchange coefficient.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a can change the flow path and move towards, improve the double-sided board tube heat exchanger of heat transfer performance.

The utility model adopts the technical proposal that:

a double-sided plate and tube heat exchanger comprising:

the heat exchange plate comprises at least one heat exchange plate, wherein each heat exchange plate comprises a plate, a first heat exchange coil and a second heat exchange coil which are respectively arranged on two sides of the plate, two ports of each first heat exchange coil are respectively communicated to a first collecting pipe and a second collecting pipe, and two ports of each second heat exchange coil are respectively connected to a third collecting pipe and a fourth collecting pipe;

the refrigeration main pipe is connected with the first collecting pipe and the third collecting pipe through two first branch pipes respectively;

the two ends of the communicating pipe are respectively connected to the second collecting pipe and the fourth collecting pipe, and a second branch pipe is arranged between the communicating pipe and the refrigeration header pipe for communicating;

two install a check valve, No. two on refrigeration house steward and the second branch pipe between the first branch pipe respectively, the export of No. two check valves is towards communicating pipe one side, the directional one side that deviates from the second branch pipe in export of a check valve.

Further conduct the utility model discloses technical scheme's improvement, the refrigeration house steward facial make-up is equipped with the check valve No. three, No. three the check valve sets up on the position between second branch pipe and first branch pipe.

Further conduct the utility model discloses technical scheme's improvement, a check valve, No. three check valves all adopt the check valve, No. three check valves's export is directional in the second branch pipe.

Further conduct the utility model discloses technical scheme's improvement, No. two check valves are the check valve.

Further conduct the utility model discloses technical scheme's improvement, each heat exchange coil and No. two heat exchange coil are serpentine coil.

Further conduct the utility model discloses technical scheme's improvement is located same heat exchange coil on sheet two sides and No. two heat exchange coil's crooked opposite direction.

Further conduct the utility model discloses technical scheme's improvement, each the range upon range of interval arrangement of heat transfer slab is adjacent distance between the heat transfer slab equals.

Further conduct the utility model discloses technical scheme's improvement, a pressure manifold, No. two pressure manifolds, No. three pressure manifolds, No. four pressure manifolds all with the place plane mutually perpendicular of each heat transfer slab.

The beneficial effects of the utility model reside in that: the double-sided plate tube heat exchanger can change the flow path trend of the refrigerant when serving as an evaporator or a condenser by controlling the first check valve and the second check valve; when the plate tube is used as an evaporator, the double-panel tube is in a parallel operation state, so that the pressure drop is reduced; when the heat exchanger is used as a condenser, the heat exchange coil pipes on the two sides are connected in series to operate, the convection heat exchange coefficient is improved, and the heat exchange performance is greatly improved.

Drawings

The present invention will be further explained with reference to the accompanying drawings:

FIG. 1 is a diagram of the refrigerant flow path when an embodiment of the present invention is acting as a condenser;

FIG. 2 is a refrigerant flow diagram when an embodiment of the present invention is functioning as an evaporator;

fig. 3 is a diagram of a heat pump system to which an embodiment of the present invention is applied.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 to 3, for an embodiment of the present invention, a double-sided plate tube heat exchanger is introduced, which includes at least one heat exchange plate 1, each heat exchange plate 1 is stacked and spaced, and the distance between adjacent heat exchange plates 1 is equal. More specifically, each heat exchange plate 1 comprises a plate 11, and a first heat exchange coil 12a and a second heat exchange coil 12b which are respectively arranged on two sides of the plate 11, two ports of each first heat exchange coil 12a are respectively communicated to a first collecting pipe 21 and a second collecting pipe 22, and two ports of each second heat exchange coil 12b are respectively connected to a third collecting pipe 23 and a fourth collecting pipe 24; first collecting pipe 21 and second collecting pipe 22 are located on one side of sheet plate 11, and third collecting pipe 23 and fourth collecting pipe 24 are located on the other side of sheet plate 11. Furthermore, the first collecting pipe 21, the second collecting pipe 22, the third collecting pipe 23 and the fourth collecting pipe 24 are all perpendicular to the plane of each heat exchange plate 1.

In this embodiment, the refrigeration manifold 2 is connected to the first collecting pipe 21 and the third collecting pipe 23 through the

first branch pipes

31a and 31b, respectively, and a check valve 5 is installed on the refrigeration manifold 2 between the first branch pipe 31a and the first branch pipe 31b, and an outlet of the check valve 5 is directed to one side of the first branch pipe 31 a. Furthermore, the second collecting pipe 22 and the fourth collecting pipe 24 are connected through a communication pipe 4, and a second branch pipe 41 extending from a middle part of the communication pipe 4 is communicated with the refrigeration header pipe 2; meanwhile, the second branch pipe 41 is provided with a second check valve 6, and the outlet of the second check valve 6 is directed to the end of the communicating pipe 4.

In the double-sided plate-tube heat exchanger, the flow path direction of the refrigerant can be changed when the double-sided plate-tube heat exchanger is used as an evaporator or a condenser by controlling the first check valve 5 and the second check valve 6; when the plate tube is used as an evaporator, the double-panel tube is in a parallel operation state, so that the pressure drop is reduced; when the heat exchanger is used as a condenser, the heat exchange coil pipes on the two sides are connected in series to operate, the convection heat exchange coefficient is improved, and the heat exchange performance is greatly improved.

Further, a check valve 7 of No. three is provided on the refrigeration trunk 2, and the check valve 7 of No. three is provided at a position between the second branch pipe 41 and the first branch pipe 31b, with its outlet directed to the side of the second branch pipe 41. More specifically, in the present embodiment, the first check valve 5, the second check valve 6, and the third check valve 7 are all check valves, and the reverse flow of the refrigerant fluid is blocked by the high-low pressure difference generating operation; in some embodiments, the check valve may be replaced with a pilot valve such as a solenoid valve.

In this embodiment, heat exchange coil 12a and heat exchange coil 12b are both serpentine coils. More specifically, the heat exchanging coil 12a and the heat exchanging coil 12b on two sides of the same plate 11 have opposite bending directions, and two ports of the heat exchanging coil 12a and the heat exchanging coil 12b are respectively located on the upper and lower sides of the plate 11. The heat exchange coil 12a and the heat exchange coil 12b are respectively arranged on two sides of the plate 11, so that the space on the plate 11 is effectively utilized, and the volume of the whole heat exchanger is better reduced.

Fig. 3 is an installation schematic diagram of the double-sided plate-tube heat exchanger applied to a heat pump system, and referring to fig. 1, when the double-sided plate-tube heat exchanger is used as a condenser in the heat pump system, the flow rate of refrigerant fluid is slow, the third check valve 7 is turned on, high-temperature and high-pressure refrigerant gas enters from the refrigeration header pipe 2 on the upper portion, flows into the first header pipe 21, flows out from the second header pipe 22 to the communication pipe 4 after passing through the heat exchange coil 12a, then enters the fourth header pipe 24 along the communication pipe 4, flows out from the third header pipe 23 after passing through the heat exchange coil 12b, and flows out to the throttle expansion valve 8 after entering the refrigeration header pipe 2 along the direction of.

As shown in fig. 2, when the double-sided plate-and-tube heat exchanger serves as an evaporator in a heat pump system, the flow rate of refrigerant fluid is high, the first check valve 5 and the second check valve 6 are communicated, the low-temperature and low-pressure gas-liquid two-phase refrigerant fluid enters from the lower part of the refrigeration header pipe 2, and is uniformly divided into two paths after passing through the second branch pipe 41, and the pressure drop is reduced; one divided path enters a second collecting pipe 22 along the communicating pipe 4 on one side, and flows out of the first collecting pipe 21 after heat exchange through the heat exchange coil 12 a; the other path enters from the fourth collecting pipe 24 along the communicating pipe 4 on the other side, flows out from the third collecting pipe 23 after heat exchange of the heat exchange coil, and the refrigerant fluid of the path is merged with the refrigerant fluid flowing out from the first collecting pipe 21 after passing through the first check valve 5 and flows to the suction end of the compressor 9.

Naturally, the invention is not limited to the above-described embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the invention, and such equivalent modifications or substitutions are included in the scope of the claims of the present application.

Claims

1. A double-panel tube heat exchanger is characterized in that: the method comprises the following steps:

2. The two-panel tube heat exchanger of claim 1, wherein: refrigeration house steward facial make-up is equipped with No. three check valves, No. three check valves set up in the position between second branch pipe and first branch pipe, No. three check valve's export is towards the second branch pipe.

3. The double-plate tube heat exchanger of claim 2, wherein: no. one check valve, No. two check valves and No. three check valves all adopt the check valve.

4. The two-panel tube heat exchanger of claim 1, wherein: and the first heat exchange coil and the second heat exchange coil are coiled coils.

5. The two-panel tube heat exchanger of claim 4, wherein: the first heat exchange coil and the second heat exchange coil on two sides of the same plate are opposite in bending direction.

6. The two-panel tube heat exchanger of claim 1, wherein: the heat exchange plates are arranged in a stacking and spacing mode, and the distances between the adjacent heat exchange plates are equal.

7. The two-panel tube heat exchanger of claim 6, wherein: the first collecting pipe, the second collecting pipe, the third collecting pipe and the fourth collecting pipe are all perpendicular to the plane of each heat exchange plate.