CN201945096U - Evaporator structure - Google Patents

Abstract

An evaporator structure comprises a heat exchanger, the heat exchanger comprises two or more than two evaporation areas around a heat exchange fan, a refrigerant flow pipeline repeatedly penetrating the heat exchanger, a refrigerant inlet and a refrigerant outlet, the refrigerant flowing pipeline is communicated in the two or more heat exchange areas through a jumper pipe, the refrigerant flowing pipeline is divided into a first branch and a second branch by a jumper pipe and a T-shaped tee joint, the first branch is connected with a first capillary tube, the second branch is connected with a second capillary tube, partial refrigerant flow pipelines of the first branch and the second branch are arranged in a common evaporation area, the two or more heat exchange areas contain a heat exchange area with the maximum surface air volume distribution, and the common evaporation area is arranged in the heat exchange area with the maximum surface air volume distribution. The utility model discloses improve 15% than current countercurrent flow heat exchange evaporimeter refrigerating capacity, the efficiency ratio improves 13%.

Description

An evaporator structure

technical field

The utility model relates to the technical field of room air conditioners, in particular to an evaporator structure.

Background technique

With the concept of energy saving and environmental protection becoming more and more popular, the problem of high energy consumption of air conditioners has attracted increasing attention. In order to improve the heat exchange capacity of air conditioners, domestic air-conditioning companies generally increase the heat exchange area of the evaporator and condenser. A common way to increase the heat exchange area of the evaporator and condenser is to use two or more rows of evaporators and condensers. However, the ordinary two-row or multi-row evaporator pipeline layout is only a simple countercurrent heat exchange method, which cannot solve the problem of poor heat exchange efficiency during reverse heat exchange inside the evaporator, resulting in The energy efficiency ratio and efficiency number are low, and the power consumption is large, which does not conform to the concept of energy conservation and environmental protection in today's society.

Utility model content

The purpose of this utility model is to overcome the shortcomings of the above-mentioned prior art, and provide an evaporator structure and a refrigerant flow control method that combines air volume and flow to optimize the heat transfer performance of the evaporator.

The technical solution adopted by the utility model is to provide an evaporator structure, including a heat exchanger, and the heat exchanger includes two or more evaporation regions around the heat exchange fan, and is repeatedly installed in the heat exchanger The refrigerant flow pipeline, the refrigerant inlet and the refrigerant outlet, the refrigerant flow pipeline communicates in the two or more heat exchange areas through a jumper pipe, and the refrigerant flow pipeline passes through a jumper pipe and a T The pipeline is divided into a first branch and a second branch by the shape tee, the first branch is connected to the first capillary, the second branch is connected to the second capillary, the first branch and the second branch Part of the refrigerant flow pipeline of the road is set in a common evaporation area, and a heat exchange area with the largest surface air volume distribution is included in the two or more heat exchange areas, and the common evaporation area is set on the surface In the heat exchange area with the largest air volume distribution.

In the above-mentioned evaporator structure, the heat exchanger includes a first sub-evaporation area, a second sub-evaporation area and a common evaporation area around the heat exchange fan, the T-shaped tee is arranged in the common evaporation area, and the first sub-evaporation area The evaporation area and the common evaporation area are connected by a jumper pipe, and the second sub-evaporation area is connected with the common evaporation area by a jumper pipe.

Compared with the prior art, the utility model has the following advantages:

The process structure and method of an evaporator of the utility model, combined with the countercurrent heat exchange under air volume distribution and flow distribution, is an optimization of the existing countercurrent heat exchange technology. Compared with the existing countercurrent heat exchange technology, refrigeration The energy consumption is increased by 15%, and the energy efficiency ratio is increased by 13%, thereby improving the heat exchange efficiency, saving electric energy, and being more competitive in the market.

Description of drawings

Fig. 1 is the structural representation of evaporator of the present utility model;

Fig. 2 is a schematic diagram of the refrigerant flow direction of the evaporator shown in Fig. 1 during refrigeration;

Fig. 3 is a schematic diagram of the air volume distribution of the evaporator structure of the present invention.

Detailed ways

The utility model will be further described below through specific embodiments in conjunction with the accompanying drawings.

Since the heat exchange capacity of each heat exchange unit is directly proportional to the air volume, the heat exchange unit with larger air volume has better heat exchange effect. Since the air volume distribution on the surface of the heat exchanger is different, if the heat exchanger is divided into several heat exchange units, the heat exchange capacity of each heat exchange unit is different. The heat exchange capacity of each heat exchange unit is directly proportional to the air volume, the heat exchange unit with larger air volume has better heat exchange effect. In addition, the heat exchange capacity of the heat exchange unit is also directly proportional to the flow rate of the refrigerant. The greater the flow rate of the refrigerant per unit time, the better the heat exchange capacity of the heat exchange unit. Therefore, when optimizing the design of process layout, it is necessary to fully consider the difference in air volume distribution and make reasonable use of the difference in air volume distribution. So that the refrigerant can be reasonably distributed in each heat exchange unit. Give full play to the heat exchange capacity of each heat exchange unit, thereby improving the heat exchange capacity of the entire heat exchanger.

The utility model divides the evaporator into three evaporation areas, and each area adjusts the flow rate of the refrigerant in the pipeline according to the air volume and the length of the refrigerant flow pipeline (which can also be understood as the number of U tubes), as follows:

As shown in Figure 1 and Figure 2, the evaporator described in the utility model mainly includes: refrigerant inlet 1, T-shaped tee pipe 2, cross pipe 3, second refrigerant outlet 4, second capillary 5, first capillary 6 , the first refrigerant outlet 7, and a refrigerant flow pipeline 8.

As shown in Figure 1, the first capillary 6 and the second capillary 5 are respectively connected to the outlets of the first branch and the second branch of the evaporator. After the refrigerant enters the evaporator, it is divided into two paths. The flow in the road 8 is collected after passing through the first capillary 6 and the second capillary 5. The refrigerant enters through the refrigerant inlet 1 of the evaporator, passes through the jumper pipe 3 and the T-shaped tee 2, and is divided into two branches for heat exchange, respectively from the refrigerant outlets of the two branches (the second refrigerant outlet 4 and the first refrigerant outlet 7) Outflow. Among them, the branch that flows downward from the T-shaped tee 2 to the first secondary evaporation area 11 is the first branch, and the branch that flows from the T-shaped tee 2 to the second secondary evaporation area 9 in the horizontal direction is the second branch. Two branches, the arrow on the refrigerant flow pipeline 8 in the figure indicates the flow direction of the refrigerant in the refrigerant flow pipeline 8 . During the flow of the refrigerant, the temperature of the refrigerant drops with the flow. The refrigerant flow pipeline 8 is composed of a plurality of U-shaped tubes, which are interspersed in the heat exchanger multiple times. Referring to FIG. 2 and FIG. After the tee 2 comes out, the first sub-evaporation area 11 and the second sub-evaporation area 9 first flow along the U-pipe on the windward side, and then flow along the U-pipe on the leeward side, so as to ensure that the flow between the refrigerant and the air is countercurrent Heat exchange, improve the heat exchange efficiency between refrigerant and air.

As shown in Figure 2, in the common evaporation area 10, the refrigerant first evaporates in a section of the U tube, and then is divided into the first branch and the second branch by the T-shaped tee 2, and finally the refrigerant comes out of the two refrigerant outlets and flows through the first branch respectively. The first capillary 6 and the second capillary 5 are combined into the refrigeration main circuit.

As shown in Figure 3, the air volume distribution in the first auxiliary evaporation area 11, the second auxiliary evaporation area 9, and the common evaporation area 10 is uneven, wherein the common evaporation area 10 accounts for about 55% of the total air volume, and the first auxiliary evaporation area Area 11 accounts for about 25% of the total air volume, and the second secondary evaporation area 9 accounts for about 20% of the total air volume. Because the distribution of the air volume on the surface of the evaporator is uneven, the heat exchange capacity and the required refrigerant flow rate of the first branch and the second branch are different, so the first capillary 6 and the second capillary 5 need to be adjusted. Refrigerant flow distribution of branches. The refrigerant flow distribution between the first branch and the second branch is determined by the surface air volume distribution of the heat exchanger where the branch is located and the number of U tubes. In areas with greater air volume distribution, the more U-pipes are installed, the greater the flow of refrigerant and the greater the heat transfer.

By adopting the above-mentioned process structure and method of the evaporator, the cooling capacity is increased by 15%, and the energy efficiency ratio is increased by 13%.

Claims (2)

1. An evaporator structure, comprising a heat exchanger, the heat exchanger includes two or more evaporation regions around the heat exchange fan, and the refrigerant flow pipeline (8) repeatedly passing through the heat exchanger , the refrigerant inlet (1), the first refrigerant outlet (7), and the second refrigerant outlet (4), and the refrigerant flow pipeline (8) passes through the jumper pipe (3) in the two or more exchanges The refrigerant flow pipeline is divided into a first branch and a second branch through a jumper pipe (3) and a T-shaped tee pipe (2), which is characterized in that: the first The branch is connected to the first capillary (6), the second branch is connected to the second capillary (5), and part of the refrigerant flow lines of the first branch and the second branch are arranged in a common evaporation area (10) In the two or more heat exchange areas, there is a heat exchange area with the largest surface air volume distribution, and the common evaporation area (10) is set in the heat exchange area with the largest surface air volume distribution. 2. The evaporator structure according to claim 1, characterized in that: the heat exchanger includes a first auxiliary evaporation area (11), a second auxiliary evaporation area (9) and a common evaporation area (10) around the heat exchange fan. ), the T-shaped tee pipe (2) is arranged in the common evaporation area (10), the first secondary evaporation area (11) and the common evaporation area (10) are connected by a jumper pipe (3), and the first The secondary evaporation area (9) and the common evaporation area (10) are connected by a jumper pipe (3).

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