CN209541030U - Air conditioner indoor unit and air conditioner - Google Patents

Abstract

The utility model discloses a kind of air conditioner indoor unit and air conditioner, wherein, heat exchanger in air conditioner indoor unit includes multiple fins and a plurality of refrigerant pipe through the setting of the multiple fin, the a plurality of refrigerant pipe is intervally arranged along the length direction of each fin, and the refrigerant pipe is in single setting on wind-guiding direction；The caliber of the refrigerant pipe is 6.8mm~7.5mm, and 17.2mm~22mm is divided between adjacent two refrigerant pipe, and the width of the fin is 10mm~17.9mm.Technical solutions of the utility model can reduce the cost of air-conditioning cabinet indoor unit.

Description

Air conditioner indoor unit and air conditioner

technical field

The utility model relates to the technical field of air conditioners, in particular to 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, and the rear row can only contribute 30% of the heat exchange. The overall cost of the double-row heat exchanger is relatively high.

Utility model content

The main purpose of the utility model is to provide an air conditioner indoor unit, aiming at solving the technical problem of high cost of the air conditioner in the prior art.

In order to achieve the above object, the air conditioner indoor unit proposed by the utility model includes a plurality of fins and a plurality of refrigerant pipes arranged through the plurality of fins, and the plurality of refrigerant pipes are spaced apart along the length direction of each of the fins. Arrangement, the refrigerant pipes are arranged in a single row in the air guiding direction; the diameter of the refrigerant pipes is 6.8mm-7.5mm, and the interval between two adjacent refrigerant pipes is Pt, 17.2mm≤Pt≤22mm, The width of the fins is Pl, 10mm≤Pl≤17.9mm.

Preferably, 17.2mm≤Pt≤20.2mm, 13.1mm≤Pl≤17.9mm.

Preferably, 18.2mm≤Pt≤21mm, 13.1mm≤Pl≤17.9mm.

Preferably, 19.1mm≤Pt≤20.2mm, 13.1mm≤Pl≤15.5mm.

Preferably, the plurality of fins have the same width.

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

Preferably, the heat exchanger is arranged in an arc shape protruding toward the air inlet side.

Preferably, the surface of the leeward side of the fins is provided with a corrugated structure, or is provided with a flat plate shape, or is provided with a louver structure, or is provided with a bridge structure.

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

The utility model also proposes an air-conditioning indoor unit, including a new heat exchanger, the new 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 the refrigerant pipes are arranged in a single row in the air guiding direction; the diameter of the refrigerant pipes is 6.8 mm to 7.5 mm, and the distance between two adjacent refrigerant pipes is Pt, 17.2mm≤Pt≤22mm, the width of the fins is Pl, 10mm≤Pl≤17.9mm.

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

The utility model 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 that run through the plurality of fins. The plurality of refrigerant pipes are arranged along the The length direction of each of the fins is arranged at intervals, and the refrigerant pipes are arranged in a single row in the air guiding direction; the diameter of the refrigerant pipes is 6.8 mm to 7.5 mm, and the distance between two adjacent refrigerant pipes is Pt, 17.2mm≤Pt≤22mm, and the width of the fin is Pl, 10mm≤Pl≤17.9mm.

The technical solution of the utility model proposes an air-conditioning indoor unit. The refrigerant pipes of the heat exchanger in the air-conditioning indoor unit are arranged in a single row, and when the diameter of the refrigerant pipes is within 6.8mm-7.5mm, the adjacent refrigerant pipes The interval Pt of the fins is kept in the range of 17.2mm-22mm, and the width Pl of the fins is kept in the range of 10mm-17.9mm, so that the single-row heat exchanger can achieve the heat exchange performance of the double-row heat exchanger. Obviously, the new The heat exchanger uses fins with a smaller area and fewer refrigerant tubes to achieve the same heat exchange performance as the double-row heat exchanger. Therefore, it significantly reduces the cost of the air conditioner.

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 accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the present utility model, and those skilled in the art can also obtain other drawings according to the structures shown in these drawings without creative work.

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 air volume ratio * frontal area ratio, and the curve schematic diagram of P1;

Fig. 4 is the curve schematic diagram of total cost 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 windshield 12 Refrigerant pipe 2 shell 3 Wind wheel assembly

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

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with 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. Example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

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 utility model, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the relative positional relationship, movement conditions, etc. between the components shown in the figure below are changed, if the specific posture changes, the directional indication will also change accordingly.

In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. Implying their relative importance or implying 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 , also not within the scope of protection required by the utility model.

The utility model proposes an air conditioner indoor unit and an air conditioner including the air conditioner indoor unit. In this embodiment, the air conditioner indoor unit is a wall-mounted air conditioner indoor unit or 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 utility model, 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 The fins 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. The refrigerant pipes are arranged in a single row in the air guiding 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 fins 11 in the existing double-row heat exchanger. The next step to be considered is to improve the heat transfer performance of the heat exchanger 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 constant, the distance Pt between adjacent refrigerant pipes 12 and The width P1 of the fin 11 has a significant influence on the heat exchange performance of the heat exchanger.

Within the diameter range of 6.8mm to 7.5mm of the refrigerant pipe 12 (Φ7) (such as 6.9mm, 7.0mm, 7.2mm, 7.3mm, 7.4mm, 7.5mm, that is (6.8, 7.5mm]), the control Pt must be In the case of , test the relationship between Pl and the heat exchange H of the windward side of the unit on the air side, and obtain Table 1:

Among them, 1P7-21 represents a single-row heat exchanger with a pipe diameter of Φ7 and Pt=21mm.

Under the condition of controlling Pl to be constant, test the relationship between Pt and the heat transfer amount of the windward side of the air-side unit, and obtain Table 2:

It can be known from Table 1 that when Pt is constant, the larger Pl is, the larger the H value is; also referring to Table 2, it can be known that when Pt is constant, the larger Pt is, the smaller the H value is.

In general, for a double-row heat exchanger, the front row takes about 70% of the heat exchange, and the rear row takes about 30% of the heat exchange. For a single row, since there is only one row of heat exchangers, it has to bear 100% of the heat exchange. If the effect of double rows is to be achieved, it is often necessary to increase the area of the single row of heat exchangers. Refer to Table 3:

In order to determine the relationship between Pt, Pl and the total cost of the heat exchanger, Table 4 is obtained:

The heat exchanger cost refers to the material cost of the fins and refrigerant tubes of the heat exchanger itself. The increase in volume refers to the increase in the packaging cost of the heat exchanger and the increase in the structural size of the air conditioner that matches the heat exchanger when the heat exchanger is enlarged, such as the lengthening of the wind wheel, the lengthening of the chassis of the air conditioner, the lengthening of the panel, and other shells. The increased cost of body lengthening.

T refers to the temperature difference, that is, the extent to which the indoor air temperature is reduced on the basis of the same heat transfer. For example, before the air conditioner is turned on, the room temperature is 30°C. After a heat exchange of 3675w (about 3569w to 3592w), the double-row heat exchanger (2p7-21-13.37) can lower the room temperature to 22.16°C.

The air volume ratio refers to the air volume ratio of single-row heat exchangers and double-row heat exchangers (2P7-21-13.37). The frontal area ratio is the ratio of the frontal area of the single-row heat exchanger to the double-row heat exchanger (2P7-21-13.37). Air volume ratio * frontal area ratio can reflect the overall heat transfer performance of the heat exchanger (see Figure 2). For a heat exchanger, the higher the heat transfer coefficient, the better the heat transfer performance. That is, when the value of the air volume ratio * windward area is larger, it means that the heat transfer coefficient of the heat exchanger is lower, and the value of the air volume ratio * windward area is closer to 1 (that is, both the air volume and the windward area are roughly equivalent to the double row), indicating that The higher the heat transfer coefficient of the heat exchanger.

It can be seen from the above table that when Pt=21mm and Pl=10mm, the total cost of the heat exchanger is 108.82 yuan, which is almost equivalent to the total cost of 108.97 yuan for the double-row heat exchanger: 2P7-21-13.37. In this way, on the basis of achieving the same amount of heat transfer, when the Pt of the single-row heat exchanger is 21mm, Pl∈[10mm, 19mm] needs to be satisfied.

Continue to observe the above table, when Pt=17.2mm, Pl=17.9mm, the frontal area ratio of the single-row heat exchanger is 1.01, which is almost equal to the frontal area of the double-row heat exchanger. When the Pl value continues to increase, the frontal area ratio decreases to 0.98, which is smaller than the standard reference value of 1, that is, the overall volume of the heat exchanger is lower than that of the double-row heat exchanger (2P7-21-13.37). In this way, the air intake will not be guaranteed, and the air output will also decrease sharply, making it difficult to meet the needs of users.

It can be seen that when Pt∈[17.2mm, 22mm], Pl∈[10mm, 17.9mm], compared with the double-row heat exchanger, the single-row heat exchanger can satisfy the same heat transfer capacity on the one hand, and on the other hand, Costs are also reduced.

Continuing to refer to the above table, when Pt=22, the corresponding average air volume ratio*windward area ratio is 2.05, which is more than twice the standard reference value, so although it can reduce the cost of the heat exchanger itself, its The heat exchange performance is not good, and the air conditioner will consume more power during operation. And when 17.2mm≤Pt≤20.2mm, 13.1mm≤Pl≤17.9mm, the air volume ratio*windward area ratio is mostly between 1 and 1.5, and the heat transfer performance is relatively good.

When Pt=17.2mm and Pl=19mm, the length of the heat exchanger is adjusted to 500mm. At this time, the air volume ratio*windward area ratio is just 1, and the corresponding air heat exchange rate reaches 3638w, but the corresponding cost Higher than 1P-17.2-17.9. It can be seen that when Pl≥17.9mm, on the basis of keeping the air volume ratio*windward area ratio at 1, the total cost of the heat exchanger will gradually increase with the increase of the fin width.

For single-row heat exchangers, although the smaller the Pt value, the larger the Pl value, the lower the total cost of the heat exchanger (see Figure 3), but at this time, the wind resistance of the heat exchanger is relatively large, and the power loss is serious . When Pt=22mm and the Pl value is too large, although the cost of the heat exchanger is similar to that of a single row, the resistance of the heat exchanger to the air at this time is relatively small, the heat exchange coefficient of the heat exchanger is relatively low, and most of the electric energy cannot Converted into refrigeration energy consumption, resulting in poor heat transfer performance. Based on this, the Pt value should not be too large, and the Pl value should not be too small. Preferably, 18.2mm≤Pt≤21mm, 13.1mm≤Pl≤17.9mm.

In order to test the relationship between Pt and pl and the energy efficiency ratio of the air conditioner, the experimental test results in Table 5:

Theoretically, the smaller the air volume ratio * frontal area ratio of the heat exchanger, the higher the energy efficiency ratio, and the same is true for heat exchanger specifications with the same tube spacing. However, referring to Table 5, as the tube spacing gradually increases, and comparing different tube spacings, it is found that when 19.1mm≤Pt≤20.2mm, the average energy efficiency ratio of the air conditioner reaches a peak value (3.76-3.77).

Analysis: For single-row heat exchangers, although the smaller the Pt value, the larger the Pl value, the lower the total cost of the heat exchanger, but at this time, the wind resistance of the heat exchanger is too large, and the power loss is serious. When Pt=22mm and the Pl value is too large, although the cost of the heat exchanger is similar to that of a single row, the resistance of the heat exchanger to the air at this time is relatively small, the heat exchange coefficient of the heat exchanger is relatively low, and most of the electric energy cannot Converted into refrigeration energy consumption, resulting in low energy efficiency ratio. Based on this, the Pt value should not be too large, and the Pl value should not be too small.

In addition, when 19.1mm≤Pt≤20.2mm, 13.1mm≤Pl≤15.5mm, the average value of air volume ratio*windward area is 1.21, which is very close to the standard reference value 1, and the average cost is as low as 85.97 yuan. The wind resistance will not be too large, nor too small, and the heat exchange coefficient is relatively high.

It can be seen that when 19.1mm≤Pt≤20.2mm and 13.1mm≤Pl≤15.5mm, the overall cost of the air conditioner can be greatly reduced, and at the same time, the air output of the air conditioner will not be affected, and the energy efficiency ratio can reach the highest value.

The technical scheme of the utility model introduces a new heat exchanger 1, the refrigerant pipes 12 of the new heat exchanger 1 are arranged in a single row, and when the pipe diameter of the refrigerant pipe 12 is within 6.8 mm to 7.5 mm, the adjacent refrigerant The interval Pt of the tubes 12 is kept in the range of 17.2 mm to 22 mm, and the width Pl of the fins 11 is kept in the range of 10 mm to 17.9 mm, so that the single-row heat exchanger can achieve the heat exchange performance of the double-row heat exchanger at a lower cost. Greatly reduced. In addition, the new heat exchanger 1 uses fins 11 with smaller area and fewer refrigerant tubes 12 to achieve the same heat exchange performance as the double-row heat exchanger, therefore, it significantly improves the performance of the heat exchanger. Excellent heat transfer performance and reduced cost.

In a preferred embodiment, the intervals between any two adjacent refrigerant pipes 12 are the same. Here, consistent can be understood as the same or roughly the same, that is, a certain tolerance is allowed, and the tolerance is ±0.1 mm. . 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.

Further, the widths of the plurality of fins 11 are consistent. Here, consistent can be understood as the same, and can also be understood as approximately the same, that is, a certain tolerance is allowed, and the tolerance is ±0.1 mm. . In this way, on the one hand, it is beneficial to improve the production efficiency of the new heat exchanger 1 , and on the other hand, it is also beneficial to ensure the uniformity of the air outlet after the air flow passes through the heat exchanger.

Referring to Fig. 5 and Fig. 6, the new heat exchanger 1 is arranged in an arc shape protruding toward the air inlet side as a whole, so that the interval between adjacent fins 11 becomes gradually smaller in the direction from the windward side to the leeward side , to form a wind guiding effect to better guide the airflow through the novel heat exchanger 1 .

Referring to FIG. 6 , a windshield portion 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 relatively large, and the airflow can easily pass through. The use of the windshield portion 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 windshield part 111 is a plurality of louver structures or bridge structures arranged at intervals along the wind guiding direction of the fin 11, and a plurality of wind guiding parts are arranged on two opposite sides of the fin 11; of course , in other embodiments, the windshield portion 111 may also be a protruding bump, a raised line, 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 space between adjacent fins 11 on the leeward side is small, and the flat sheet form is adopted, on the one hand, it is beneficial to the passage of airflow and avoids it from hindering the airflow; 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 a corrugated structure.

The utility model 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, it is therefore It has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described here one by one.

The above is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. Under the utility model concept of the utility model, the equivalent structural transformation made by using the specification of the utility model and the contents of the accompanying drawings, Or directly/indirectly used in other related technical fields are all included in the patent protection scope of the present utility model.

Claims (10)

1. air conditioner indoor unit, including heat exchanger, which is characterized in that the heat exchanger includes multiple fins and runs through the multiple The a plurality of refrigerant pipe of fin setting, a plurality of refrigerant pipe are intervally arranged along the length direction of each fin, the refrigerant Pipe is in single setting on wind-guiding direction；The caliber of the refrigerant pipe is greater than 6.8mm, is less than or equal to 7.5mm, adjacent two is described cold Pt, 17.2mm≤Pt≤22mm are divided between matchmaker's pipe, the width of the fin is Pl, 10mm≤Pl≤17.9mm.

2. air conditioner indoor unit as described in claim 1, which is characterized in that 17.2mm≤Pt≤20.2mm, 13.1mm≤Pl≤ 17.9mm。

3. air conditioner indoor unit as described in claim 1, which is characterized in that 18.2mm≤Pt≤21mm, 13.1mm≤Pl≤ 17.9mm。

4. air conditioner indoor unit as claimed in claim 3, which is characterized in that 19.1mm≤Pt≤20.2mm, 13.1mm≤Pl≤ 15.5mm。

5. the air conditioner indoor unit as described in Claims 1-4 any one, which is characterized in that the width one of multiple fins It causes.

6. the air conditioner indoor unit as described in Claims 1-4 any one, which is characterized in that any two adjacent refrigerant pipe Interval it is consistent.

7. the air conditioner indoor unit as described in Claims 1-4 any one, which is characterized in that the heat exchanger is in towards inlet side The arc of projection is arranged.

8. the air conditioner indoor unit as described in Claims 1-4 any one, which is characterized in that the surface of the fin leeward side It is arranged equipped with ripple struction or in plain film shape or is provided with shutter or is provided with bridge piece structure.

9. air conditioner indoor unit as described in claim 1, which is characterized in that the air conditioner indoor unit is wall-mounted machine or cabinet Machine.

10. a kind of air conditioner, which is characterized in that including air-conditioner outdoor unit and air-conditioning as claimed in any one of claims 1 to 9 Indoor unit.