CN108562068A - New type heat exchanger, air conditioner indoor unit and air conditioner - Google Patents

Abstract

The invention discloses a novel heat exchanger, an air-conditioning indoor unit and an air conditioner, wherein the novel heat exchanger comprises a plurality of fins and a plurality of refrigerant pipes arranged through the plurality of fins, and the plurality of refrigerant pipes Arranged at intervals along the length direction of each of the fins, and arranged in a single row in the air guiding direction; the diameter of the refrigerant pipe is 5.6 mm to 6.8 mm, and the interval between two adjacent refrigerant pipes is 15.27 mm to 20.4mm, and the width of the fins is 16mm to 19.7mm. The technical scheme of the invention improves the overall energy efficiency of the heat exchanger.

Description

New heat exchanger, indoor air conditioner and air conditioner

technical field

The invention relates to the technical field of air conditioners, in particular to a novel heat exchanger, an air conditioner indoor unit and an air conditioner.

Background technique

At present, double-row heat exchangers are generally used in air-conditioning indoor units to increase the heat exchange area of the refrigerant and enhance the heat exchange capacity of the heat exchanger; however, during the application of the double-row heat exchanger, the airflow passes through the heat exchanger, After sufficient heat exchange with the front row fins, the speed of the airflow decreases. At this time, the heat exchange is performed with the rear row fins, and the heat exchange effect is poor, that is, the capacity of the rear row heat exchangers cannot be fully utilized. Actual relevant test data shows that for a double-row heat exchanger, the front row can contribute 70% of the heat exchange, while the rear row can only contribute 30% of the heat exchange, and the overall energy efficiency of the double-row heat exchanger is low.

Contents of the invention

The main purpose of the present invention is to propose a new type of heat exchanger, aiming at solving the technical problem of low overall energy efficiency of the heat exchanger in the prior art.

In order to achieve the above object, the novel heat exchanger proposed by the present invention has a plurality of fins and a plurality of refrigerant pipes arranged through the plurality of fins, and the plurality of refrigerant pipes are arranged at intervals along the length direction of each fin. cloth, and arranged in a single row in the air guiding direction; the diameter of the refrigerant pipes is 5.6mm-6.8mm, the interval between two adjacent refrigerant pipes is 15.27mm-20.4mm, and the width of the fins is 16mm～19.7mm.

Preferably, the interval between two adjacent refrigerant pipes is 17mm-18.65mm, and the width of the fins is 17.47mm-18.95mm.

Preferably, the interval between two adjacent refrigerant pipes is 17.45mm-18.20mm, and the width of the fins is 17.82mm-18.75mm.

Preferably, the plurality of fins have the same width.

Preferably, the intervals between any two adjacent refrigerant pipes are the same.

Preferably, the plurality of fins are arranged in an arc protruding toward the air inlet side.

Preferably, the surface of the fin on the windward side is protruded with a heat transfer structure.

Preferably, the surface of the leeward side of the fin is provided with wind guiding corrugations or arranged in a flat sheet shape.

The present invention also proposes an air-conditioning indoor unit, including a novel heat exchanger, the novel heat exchanger includes a plurality of fins and a plurality of refrigerant pipes arranged through the plurality of fins, and the plurality of refrigerant pipes are arranged along each The fins are arranged at intervals in the length direction and arranged in a single row in the air guiding direction; the diameter of the refrigerant pipe is 5.6mm-6.8mm, and the width of the fins is 15.2mm-20.4mm, which is relatively The distance between two adjacent refrigerant pipes is 16.0mm-19.7mm.

Preferably, the air conditioner indoor unit is a wall-mounted air conditioner indoor unit or a cabinet unit.

The present invention also proposes an air conditioner, including an air conditioner outdoor unit and an air conditioner indoor unit. The air conditioner indoor unit includes a plurality of fins and a plurality of refrigerant pipes passing through the plurality of fins. The plurality of refrigerant pipes are arranged along each The fins are arranged at intervals in the longitudinal direction, and arranged in a single row in the direction of air guide; the diameter of the refrigerant pipe is 5.6mm-6.8mm, and the width of the fins is 15.2mm-20.4mm, The distance between two adjacent refrigerant pipes is 16.0mm-19.7mm.

The technical solution of the present invention introduces a new type of heat exchanger. The refrigerant tubes of the new type heat exchanger are arranged in a single row, and when the diameter of the refrigerant tubes is within 5.6 mm to 6.8 mm, the interval Pt between adjacent refrigerant tubes is maintained. In the range of 15.2mm to 20.4mm, the width Pl of the fins is kept in the range of 16.0mm to 19.7mm, so that the single-row heat exchanger can achieve the heat exchange performance of the double-row heat exchanger. Obviously, this new type of heat exchange The heat exchanger uses smaller fins and fewer refrigerant tubes to achieve the same heat exchange performance as the double-row heat exchanger, so it significantly improves the energy efficiency of the heat exchanger.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative effort.

Fig. 1 is a schematic structural view of an embodiment of an air conditioner indoor unit of the present invention;

Fig. 2 is a structural schematic diagram of fins and refrigerant tubes of the novel heat exchanger in Fig. 1;

Fig. 3 is the curve schematic diagram of comprehensive heat transfer performance rate of change and Pt;

Fig. 4 is the curve schematic diagram of comprehensive heat transfer performance rate of change and P1;

Fig. 5 is the structural representation of novel heat exchanger in Fig. 1;

FIG. 6 is a partial cross-sectional schematic view of the novel heat exchanger in FIG. 5 .

Explanation of reference numbers:

label name label name 1 New Heat Exchanger 11 fins 111 heat transfer structure 12 Refrigerant pipe 2 shell 3 Wind wheel assembly

The realization of the purpose of the present invention, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the specific posture changes, the directional indication will also change accordingly.

In addition, if there are descriptions involving "first", "second" and so on in the embodiments of the present invention, the descriptions of "first", "second" and so on are only for descriptive purposes, and should not be interpreted as indicating or implying Its relative importance or implicitly indicates the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , nor within the scope of protection required by the present invention.

The present invention proposes a new heat exchanger and an air conditioner indoor unit with the new heat exchanger. In this embodiment, the air conditioner indoor unit is a wall-mounted air conditioner indoor unit or a cabinet unit. Elaborate. Referring to Fig. 1, the wall-mounted air conditioner indoor unit includes a casing 2 installed on the wall, a wind wheel assembly 3 inside the casing 2, and a new heat exchanger 1 semi-enclosed on the upper side of the wind wheel assembly 3, For example but not limited to, the wind wheel assembly 3 is a cross-flow wind wheel. Of course, in other embodiments, the air conditioner indoor unit may also be of other types, and the present design is not limited thereto.

In the embodiment of the present invention, referring to Fig. 1 to Fig. 4, the novel heat exchanger 1 includes a plurality of fins 11 and a plurality of refrigerant pipes 12 arranged through the plurality of fins 11, and a plurality of refrigerant pipes 12 are arranged along each fin. The pieces 11 are arranged at intervals in the length direction, and the ends of the plurality of refrigerant pipes are connected by connecting joints, which are generally U-shaped elbows. And it is arranged in a single row in the air guide direction; it can be understood that the heat exchanger is arranged in a single row, which can effectively overcome the problem of insufficient heat exchange of the rear row of fins 11 existing in the existing double-row heat exchanger. The consideration is to improve the heat transfer performance of the heat exchanger so as to achieve the effect of a double-row heat exchanger; in this regard, research has found that when the diameter of the refrigerant pipe 12 is fixed, the distance Pt between adjacent refrigerant pipes 12 and the fins 11 The width Pl has a significant impact on the heat transfer performance of the heat exchanger.

In the pipe diameter range 5.6mm～6.8mm of refrigerant pipe 12 (such as 5.6mm, 5.8mm, 6.0mm, 6.35mm, 6.5mm, 6.8mm), under the certain situation of controlling P1, test the relationship between Pt and A, pass Table 1 is obtained from the data of experiment 1 to experiment 99:

Table 1

A(%) Pt(mm) Pl(mm) experiment one 4.2 14 18 Experiment 2 5.25 15 18 Experiment three 5.9 16 18 Experiment four 6.3 17 18 Experiment five 6.43 18 18 Experiment six 6.2 19 18 Experiment seven 5.7 20 18 Experiment eight 5.1 twenty one 18 Experiment nine 4.4 twenty two 18

Through the seven sets of data in Table 1, the relationship curve between the interval Pt of adjacent refrigerant pipes 12 and the heat transfer performance A of the heat exchanger is fitted (refer to FIG. 3 ):

A=0.0062Pt ₃ -0.4647Pt ₂ +10.639Pt-70.66; R ² =0.997.

As shown in the figure, within the diameter range of the refrigerant pipe 12 from 5.6mm to 6.8mm, the heat transfer performance A of the heat exchanger increases first and then reaches the peak value (Pt ≈18.0mm), and then gradually decrease.

Within the diameter range of the refrigerant pipe 12 of 5.6 mm to 6.8 mm, test the relationship between the distance Pt between adjacent refrigerant pipes 12 and the width Pl of the fin 11 (D), and the heat transfer performance B of the heat exchanger, refer to Table 2:

B(%) D(Pt/Pl) Pt(mm) Pl(mm) experiment one 2.3 1.5 18 12 Experiment 2 3.8 1.384615 18 13 Experiment three 5 1.285714 18 14 Experiment four 6.02 1.2 18 15 Experiment five 6.9 1.125 18 16 Experiment six 7.6 1.058824 18 17 Experiment seven 7.95 1 18 18 Experiment eight 7.8 0.947368 18 19 Experiment nine 6.7 0.9 18 20 Experiment ten 5.5 0.8571429 18 twenty one Experiment eleven 4 0.818182 18 twenty two

Through the nine sets of data in Table 2, the relationship curve between D and heat transfer performance B is fitted (refer to Figure 4):

B=-174.06D ⁴ +895.18D ³ -1719.3D ² +1449.3D-443.22; R ² =0.997.

In this embodiment, (Amax-1)% to Amax% and (Bmax-1)% to Bmax% are selected as better performance intervals, then the corresponding Pt obtained by calculation should satisfy: Pt∈[15.2mm, 20.4mm] , for example Pt=15.3mm, 15.4mm, 16mm, 17mm, 18mm, 19mm, 20mm, 20.2mm, 20.3mm. The corresponding Pl should satisfy: Pl∈[16mm, 19.7mm], for example, Pl=16.1mm, 16.2mm, 17mm, 18mm, 19mm, 19.5mm, 19.6mm.

It can be seen from Figure 3 that Amax≈6.4, and from Figure 4 that Bmax≈7.95.

Select 0.98Amax to Amax and 0.98Bmax to Bmax as the better performance range, then the corresponding Pt should satisfy: Pt∈[17mm, 18.65mm], and the corresponding Pl should satisfy: Pl∈[17.47mm, 18.95mm] .

Select 6.4～Amax, 7.95～Bmax as the performance interval, then the corresponding Pt should satisfy: Pt∈[17.45mm, 18.2mm], and the corresponding Pl should satisfy: Pl∈[17.82mm, 18.75mm].

The technical solution of the present invention introduces a new type of heat exchanger 1. The refrigerant pipes 12 of the new heat exchanger 1 are arranged in a single row, and when the diameter of the refrigerant pipes 12 is within 5.6 mm to 6.8 mm, the adjacent refrigerant pipes The interval Pt of 12 is kept in the range of 15.2mm-20.4mm, and the width Pl of the fins 11 is kept in the range of 16mm-19.7mm, so that the single-row heat exchanger can achieve the heat exchange performance of the double-row heat exchanger, obviously , the new heat exchanger 1 uses fins 11 with a smaller area and fewer refrigerant tubes 12, and can achieve the same heat exchange performance as the double-row heat exchanger. Therefore, it significantly improves the performance of the heat exchanger. efficiency.

Further, the intervals between any two adjacent refrigerant pipes 12 are consistent. It can be understood that such an arrangement, on the one hand, can reduce the technical difficulty of opening refrigerant holes on the fins 11, and then improve the overall production efficiency of the new heat exchanger 1; Uniformity of wind. In this embodiment, the distance between two adjacent refrigerant pipes 12 ranges from 17.0 mm to 18.65 mm. According to the relationship between the heat transfer performance A of the heat exchanger and the distance Pt between the refrigerant pipes 12 in FIG. When the interval range of 12 is 17.0 mm to 18.65 mm, the heat transfer performance A of the heat exchanger reaches the peak value.

Further, the plurality of fins 11 have the same width. It can be understood that such setting, on the one hand, is conducive to improving the production efficiency of the new heat exchanger 1, and on the other hand, is also beneficial to ensuring the uniformity of the air outlet after the air flow passes through the heat exchanger.

Further, referring to Fig. 5 and Fig. 6, a plurality of fins 11 are arranged in an arc shape protruding toward the air inlet side, that is, the novel heat exchanger 1 is arranged in an arc shape protruding toward the air inlet side as a whole. The space between the adjacent fins 11 becomes gradually smaller in the direction from the windward side to the leeward side, forming a wind guiding effect and better guiding the airflow through the novel heat exchanger 1 .

Further, referring to FIG. 6 , a heat transfer structure 111 protrudes from the surface of each fin 11 on the windward side. It can be understood that the distance between adjacent fins 11 on the windward side is large, and the airflow can easily pass through. The heat transfer structure 111 is beneficial to increase the heat exchange area on the windward side, thereby enhancing the heat exchange effect on the windward side. In this embodiment, the heat transfer structure 111 is a plurality of heat transfer windows set at intervals along the air guiding direction of the fin 11, and the plurality of heat transfer windows are respectively arranged on the two opposite sides of the fin 11; of course, in other In an embodiment, the heat transfer structure 111 may also be a protruding heat transfer block, a heat transfer strip, etc., and the present design is not limited thereto.

Further, referring to FIG. 6 , the surface of each fin 11 on the leeward side is arranged in a flat sheet shape. It can be understood that the distance between adjacent fins 11 on the leeward side is small, and the flat sheet form is adopted. On the one hand, it is conducive to the passage of airflow and avoids it from hindering the airflow. On the other hand, no additional design of the fins 11 is required. It is beneficial to reduce the processing cost of the novel heat exchanger 1 . It should be noted that the present design is not limited thereto, and in other embodiments, the surface of each fin 11 on the leeward side may also be provided with wind guiding corrugations.

The present invention also proposes an air conditioner, which includes an air conditioner outdoor unit and an air conditioner indoor unit. The specific structure of the air conditioner indoor unit refers to the above-mentioned embodiments. Since the air conditioner adopts all the technical solutions of the above-mentioned embodiments, at least All the beneficial effects brought by the technical solutions of the above embodiments will not be repeated here.

The above is only a preferred embodiment of the present invention, and does not therefore limit the patent scope of the present invention. Under the inventive concept of the present invention, the equivalent structural transformation made by using the description of the present invention and the contents of the accompanying drawings, or direct/indirect use All other relevant technical fields are included in the patent protection scope of the present invention.

Claims (11)

1. A novel heat exchanger, characterized in that it comprises a plurality of fins and a plurality of refrigerant tubes arranged through the plurality of fins, and the plurality of refrigerant tubes are spaced apart along the length direction of each of the fins Arranged in a single row in the air guiding direction; the diameter of the refrigerant pipes is 5.6mm-6.8mm, the interval between two adjacent refrigerant pipes is 15.27mm-20.4mm, and the width of the fins 16mm to 19.7mm. 2 . The novel heat exchanger according to claim 1 , wherein the distance between two adjacent refrigerant pipes is 17 mm to 18.65 mm, and the width of the fins is 17.47 mm to 18.95 mm. 3 . The novel heat exchanger according to claim 1 , wherein the distance between two adjacent refrigerant tubes is 17.45 mm to 18.20 mm, and the width of the fins is 17.82 mm to 18.75 mm. 4 . 4. The novel heat exchanger according to any one of claims 1 to 3, characterized in that the plurality of fins have the same width. 5. The novel heat exchanger according to any one of claims 1 to 3, characterized in that the intervals between any two adjacent refrigerant pipes are the same. 6. The novel heat exchanger according to any one of claims 1 to 3, wherein a plurality of said fins are arranged in an arc shape protruding toward the air inlet side. 7. The novel heat exchanger according to any one of claims 1 to 3, characterized in that, the surface of the fin on the windward side is convexly provided with a heat transfer structure. 8. The novel heat exchanger according to claim 7, characterized in that, the surface of the fin on the leeward side is provided with wind guiding corrugations or arranged in a flat sheet shape. 9. An air conditioner indoor unit, characterized in that it comprises the novel heat exchanger according to any one of claims 1 to 8. 10. The air conditioner indoor unit according to claim 9, wherein the air conditioner indoor unit is a wall-mounted air conditioner indoor unit or a cabinet unit. 11. An air conditioner, characterized by comprising an air conditioner outdoor unit and an air conditioner indoor unit according to claim 9.