Surface air cooler anti-freezing assembly and combined air conditioning unit

Abstract

The utility model belongs to the technical field of air conditioning units, and discloses a surface air cooler anti-freezing assembly and a combined air conditioning unit, the surface air cooler anti-freezing assembly comprises a first air pipe or a second air pipe, the two ends of the first air pipe can be respectively communicated with the two sides of a surface air cooler, so that mixed air flow in a primary filter is led to a fan across the surface air cooler, and the mixed air flow in a secondary filter is led to the fan. One end of the second air pipe can be communicated between the surface air cooler and the fan, and the second air pipe can mix the air flow and guide the mixed air flow to the fan across the primary filter and the surface air cooler. By using the first air pipe and the second air pipe, mixed air flow can directly cross the surface air cooler or the surface air cooler and the primary filter to be conveyed to the fan for subsequent operation, so that the surface air cooler can be directly prevented from participating in the whole operation process of the air conditioning unit in winter, and the service life of the air conditioning unit is prolonged. And the problem that residual liquid in the copper pipe is frozen under the action of cold air to cause expansion cracking of the copper pipe is solved, so that the service life of the surface air cooler is prolonged, and the maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning unit technology, and in particular to a surface cooler antifreeze component and a combined air conditioning unit. Background Technology

[0002] When using a combined air conditioning unit, the internal cooling coil is a crucial component for handling air enthalpy and humidity. In winter, the air conditioner needs to provide a certain positive pressure and ventilation to the indoor environment, requiring the cooling coil to be turned off. However, due to the unit's operating cycle, outdoor cold air continues to flow through the cooling coil to the next functional section, ensuring airflow even when the cooling coil is not in operation. However, even after venting, a small amount of liquid can remain in the copper pipes inside the cooling coil. In winter, when cold air passes through the cooling coil, this residual liquid freezes, causing expansion and potentially cracking the copper pipes. This affects the cooling coil's lifespan and increases maintenance costs. Currently, a common method is to use compressed air connected to the cooling coil's inlet to blow out the residual liquid and prevent freezing. However, this method still leaves some residual liquid adhering to the inner wall of the copper pipes, posing a continued risk of pipe cracking. Therefore, how to avoid the problem of copper tubes of the surface cooler cracking when using combined air conditioning units in winter, extend their service life, and reduce maintenance costs is a problem that needs to be solved by people in this field. Utility Model Content

[0003] The purpose of this utility model is to provide a cooler antifreeze component and a combined air conditioning unit to avoid the problem of copper tubes of the surface cooler cracking when using the combined air conditioning unit in winter, thereby extending its service life and reducing maintenance costs.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] The surface cooler antifreeze component includes:

[0006] A first duct or a second duct, wherein the two ends of the first duct are respectively connected to the two sides of the surface cooler to guide the mixed airflow in the pre-filter across the surface cooler to the fan, and one end of the second duct is connected between the surface cooler and the fan, and the second duct is capable of mixing the airflow and guiding the mixed airflow across the pre-filter and the surface cooler to the fan.

[0007] Optionally, it also includes thermal insulation material, which is provided on both sides of the surface cooler when using the first duct, and on the side of the surface cooler closest to the fan when using the second duct.

[0008] Optionally, the first duct is configured with an inlet end and an outlet end at both ends. The inlet end is located between the primary filter and the insulation material, and the outlet end is located between the fan and the insulation material. The mixed airflow in the primary filter enters through the inlet end and exits through the outlet end.

[0009] Optionally, both the inlet and outlet ends are equipped with air valves to control the opening and closing of both ends of the first air duct.

[0010] Optionally, the second air duct is provided with a second fresh air inlet, a second return air inlet, and an air outlet. The second fresh air inlet is used to deliver fresh air, the second return air inlet is used to deliver return air, and the air outlet is located between the fan and the insulation material. Fresh air and return air are mixed in the second air duct and then discharged from the air outlet.

[0011] Optionally, a duct pre-filter is provided in the second duct for mixing the fresh air introduced by the second fresh air inlet and the return air introduced by the second return air inlet, and the duct pre-filter is located between the second return air inlet and the air outlet.

[0012] Optionally, the second fresh air inlet, the second return air inlet, and the air outlet are all equipped with air valves to control the opening and closing of the second air duct.

[0013] A modular air conditioning unit includes a surface cooler antifreeze component and a primary filter, surface cooler, fan, medium-efficiency filter, and access door arranged horizontally in sequence. The surface cooler antifreeze component is located at the surface cooler to avoid the use of the surface cooler and ensure the operation of the modular air conditioning unit.

[0014] Optionally, it is also provided with a first fresh air inlet, a first return air inlet and a supply air outlet. The pre-filter can mix the fresh air introduced by the first fresh air inlet and the return air introduced by the second return air inlet and deliver them to the surface cooler. The supply air outlet can discharge the mixed airflow in the medium-efficiency filter.

[0015] Alternatively, when using the first duct in the surface cooler antifreeze assembly, the mixed airflow from the primary filter can be delivered directly to the fan across the surface cooler; when using the second duct in the surface cooler antifreeze assembly, fresh air and return air are mixed through the second duct and delivered directly to the fan across the primary filter and the surface cooler.

[0016] The beneficial effects of this utility model are:

[0017] In this embodiment, the surface cooler antifreeze component protects the surface cooler during winter, preventing it from participating in the operation of the entire air conditioning unit and thus avoiding the risk of copper pipe bursting. Specifically, by using the first and second air ducts, the mixed airflow can directly bypass the surface cooler or the surface cooler and the pre-filter, and be delivered to the fan for subsequent operation. This directly prevents the surface cooler from participating in the entire operation of the air conditioning unit in winter, avoiding the problem of residual liquid inside the copper pipes freezing under the action of cold air and causing the copper pipes to burst, thereby extending the service life of the surface cooler and reducing maintenance costs. Correspondingly, the combined air conditioning unit equipped with the surface cooler antifreeze component can also effectively avoid the problem of copper pipe bursting inside the surface cooler. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the combined air conditioning unit without the antifreeze component of the surface cooler described in this embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the combined air conditioning unit with the first air duct installed according to an embodiment of the present invention (the shaded part is not in operation);

[0020] Figure 3 This is a schematic diagram of the structure of the combined air conditioning unit with the second air duct installed according to an embodiment of the present invention (the shaded part is not in operation).

[0021] In the picture:

[0022] 10 - Primary filter; 20 - Cooler; 30 - Fan; 40 - Medium-efficiency filter; 100 - Inspection door; 101 - First fresh air inlet; 102 - First return air inlet; 103 - Supply air outlet; 51 - First air duct; 201 - Insulation material; 52 - Second air duct; 521 - Second fresh air inlet; 522 - Second return air inlet; 523 - Air outlet; 60 - Primary filter in duct. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0024] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] The technical solution of this embodiment will be further described below with reference to the accompanying drawings and specific implementation methods.

[0027] like Figures 1-3 As shown, this embodiment provides a surface cooler antifreeze component, including a first duct 51 or a second duct 52. The two ends of the first duct 51 can be connected to both sides of the surface cooler 20 respectively, so as to guide the mixed airflow in the primary filter 10 across the surface cooler 20 to the fan 30. One end of the second duct 52 can be connected between the surface cooler 20 and the fan 30, and the second duct 52 can mix the airflow and guide the mixed airflow across the primary filter 10 and the surface cooler 20 to the fan 30.

[0028] The combined air conditioning unit includes a surface cooler antifreeze component and a primary filter 10, a surface cooler 20, a fan 30, a medium-efficiency filter 40, and an access door 100 arranged horizontally in sequence. The surface cooler antifreeze component is located at the surface cooler 20 to avoid the use of the surface cooler 20 and to ensure the operation of the combined air conditioning unit.

[0029] Specifically, in this embodiment, the surface cooler antifreeze component can protect the surface cooler 20 in winter, preventing it from participating in the operation of the entire air conditioning unit and thus avoiding the risk of copper pipe bursting. Specifically, through the use of the first duct 51 and the second duct 52, the mixed airflow can directly bypass the surface cooler 20 or the surface cooler 20 and the pre-filter 10, and be delivered to the fan 30 for subsequent operation. This directly prevents the surface cooler 20 from participating in the entire operation of the air conditioning unit in winter, avoiding the problem of residual liquid in the copper pipes freezing under the action of cold air and causing copper pipe bursting, thereby extending the service life of the surface cooler 20 and reducing maintenance costs. Correspondingly, the combined air conditioning unit equipped with the surface cooler antifreeze component can also effectively avoid the problem of copper pipe bursting inside the surface cooler 20.

[0030] The specific structure of the surface cooler antifreeze component in this embodiment is described below.

[0031] like Figure 2 and Figure 3 As shown, in this embodiment, the surface cooler antifreeze component includes a first duct 51 or a second duct 52, both of which can be used in the surface cooler 20 to prevent the combined air conditioning unit from affecting the surface cooler 20 during winter operation. This avoids the residual liquid inside the surface cooler 20 from freezing and expanding, which could cause the copper pipes of the surface cooler 20 to crack, affecting its service life and increasing costs. Specifically, in this embodiment, the two ends of the first duct 51 can be connected to both sides of the surface cooler 20, so that the mixed airflow in the primary filter 10 can bypass the surface cooler 20 and be directly guided to the next station fan 30, thereby preventing the surface cooler 20 from participating in the operation. Furthermore, in this embodiment, one end of the second duct 52 can be connected between the surface cooler 20 and the fan 30, and the second duct 52 can directly mix the airflow, thereby replacing the effect of the primary filter 10, and guiding the mixed airflow directly across the primary filter 10 and the surface cooler 20 to the fan 30, so that neither the primary filter 10 nor the surface cooler 20 needs to participate in the operation.

[0032] like Figure 2As shown, exemplarily, in this embodiment, the two ends of the first air duct 51 are respectively set as an inlet end and an outlet end. The inlet end is located between the primary filter 10 and the surface cooler 20, and the outlet end is located between the fan 30 and the surface cooler 20. Thus, the mixed airflow in the primary filter 10 enters from the inlet end and exits to the fan 30 from the outlet end, enabling the normal operation of the entire air conditioning unit while preventing the surface cooler 20 from participating in the operation, thereby protecting the surface cooler 20. Furthermore, in this embodiment, the surface cooler antifreeze component is also provided with insulation material 201. When using the first air duct 51 to protect the surface cooler 20, insulation material 201 is provided on both sides of the surface cooler 20, thereby isolating the surface cooler 20 from the primary filter 10 and the fan 30 respectively, ensuring the mechanical performance of the surface cooler 20 for future use. Furthermore, the inlet end is located between the primary filter 10 and the insulation material 201 near the primary filter 10 of the surface cooler 20, while the outlet end is located between the fan 30 and the insulation material 201 near the fan 30 of the surface cooler 20, thereby isolating the surface cooler 20 from the outside environment under the action of the insulation material 201. Furthermore, in this embodiment, both the inlet and outlet ends of the first air duct 51 are equipped with air valves to control the opening and closing of both ends of the first air duct 51.

[0033] like Figure 3 As shown, in this embodiment, a primary air filter 60 is installed inside the second air duct 52, and a second fresh air inlet 521, a second return air inlet 522, and an air outlet 523 are also provided. Specifically, in this embodiment, the second fresh air inlet 521 and the second return air inlet 522 are located on one side of the primary air filter 60, and the air outlet 523 is located on the other side of the primary air filter 60. Specifically, the second fresh air inlet 521 is used to supply fresh air, the second return air inlet 522 is used to supply return air, and the air outlet 523 is located between the fan 30 and the surface cooler 20. Thus, the fresh air and return air are mixed through the primary air filter 60 and discharged through the air outlet 523, achieving the working effect of the air conditioning unit. Optionally, in this embodiment, the second return air inlet 522 is located between the duct primary filter 60 and the second fresh air inlet 521. The duct primary filter 60 is located between the second return air inlet 522 and the air outlet 523. The fresh air introduced by the second fresh air inlet 521 and the return air introduced by the second return air inlet 522 are mixed through the duct primary filter 60, and then the mixed airflow is discharged through the air outlet 523. This replaces the effect of the primary filter 10 in mixing the airflow, so that the primary filter 10 and the surface cooler 20 can be avoided without affecting the normal use of the air conditioning unit.

[0034] Furthermore, when using the second air duct 52, insulation material 201 is also provided on the surface cooler 20, and the insulation material 201 is only provided on the side of the surface cooler 20 closest to the fan 30, thereby ensuring that both the surface cooler 20 and the primary filter 10 can be isolated from the fan 30. Specifically, the air outlet 523 is located between the insulation material 201 and the fan 30, and the fresh air and return air are mixed in the second air duct 52 and then discharged to the fan 30 through the air outlet 523. For example, the second fresh air inlet 521, the second return air inlet 522, and the air outlet 523 are all equipped with air valves to control the opening and closing of the second air duct 52.

[0035] The specific structure of the combined air conditioning unit in this embodiment will be described below.

[0036] Combination Figures 1-3 As shown, in this embodiment, the combined air conditioning unit includes the aforementioned surface cooler antifreeze component and a pre-filter 10, surface cooler 20, fan 30, medium-efficiency filter 40, and access door 100 arranged horizontally in sequence. The surface cooler antifreeze component is located at the surface cooler 20 to avoid the use of the surface cooler 20 and ensure the operation of the combined air conditioning unit. Specifically, the combined air conditioning unit is provided with a first fresh air inlet 101, a first return air inlet 102, and a supply air outlet 103. The pre-filter 10 can mix the fresh air introduced by the first fresh air inlet 101 and the return air introduced by the first return air inlet 102 and deliver it to the surface cooler 20, while the supply air outlet 103 can discharge the mixed airflow in the medium-efficiency filter 40, thereby realizing the overall exhaust path of the combined air conditioning unit.

[0037] Combination Figure 2 and Figure 3 As shown (shaded areas are not in operation), in this embodiment, when using the first duct 51 in the surface cooler antifreeze assembly, fresh air is introduced through the first fresh air inlet 101, and return air is introduced through the first return air inlet 102. The mixed airflow after the fresh air and return air are mixed by the primary filter 10 can bypass the surface cooler 20 and be directly delivered to the fan 30, thereby avoiding the use of the surface cooler 20. Correspondingly, when using the second duct 52 in the surface cooler antifreeze assembly, fresh air is introduced through the second fresh air inlet 521, and return air is introduced through the second return air inlet 522. The mixed airflow after the fresh air and return air are mixed by the duct primary filter 60 can bypass the primary filter 10 and the surface cooler 20 and be directly delivered to the fan 30, thereby simultaneously avoiding the use of both the surface cooler 20 and the primary filter 10.

[0038] For example, both the first duct 51 and the second duct 52 are equipped with corresponding air valves. For example, when using the first duct 51 in summer, the air valve of the first duct 51 is closed, and the mixed airflow can pass through the primary filter 10, the surface cooler 20, the fan 30, and the medium-efficiency filter 40 in sequence. At this time, the surface cooler 20 operates normally. In winter, after draining the liquid inside the surface cooler 20, insulation material 201 is installed on both sides of the surface cooler 20, and the air valve of the first duct 51 is opened, so that fresh air and return air are introduced into the first fresh air inlet 101 and the first return air inlet 102, mixed, and after passing through the primary filter 10, they are led directly to the fan 30 through the first duct 51, bypassing the surface cooler 20. This ensures that the airflow does not pass through the surface cooler 20 before entering the next functional section, thereby preventing the residual liquid inside the copper pipe of the surface cooler 20 from freezing and eliminating the risk of cracking. Accordingly, when using the second air duct 52 in summer, the air valve of the second air duct 52 is closed, and fresh air and return air are delivered through the primary filter 10, the surface cooler 20, the fan 30, and the medium-efficiency filter 40. In winter, the air valves of the first fresh air inlet 101 and the first return air inlet 102 are closed, and the air valve of the second air duct 52 is opened, so that the mixed airflow bypasses the primary filter 10 and the surface cooler 20 and is directly led to the fan 30. This ensures that the airflow does not pass through the surface cooler 20 before entering the next functional section, thereby preventing the residual liquid inside the copper pipe of the surface cooler 20 from freezing and eliminating the risk of it cracking.

[0039] Therefore, the surface cooler antifreeze component in this embodiment can effectively avoid the use of the surface cooler 20 in the combined air conditioning unit during winter, thereby reducing the risk of freezing and cracking due to residual liquid in the surface cooler 20, thus ensuring the service life of the surface cooler and reducing costs. For example, a water test can be conducted on the surface cooler 20 subsequently to check for leaks and freezing / cracking, thus determining the effectiveness of the surface cooler antifreeze component. Compared to the prior art that only uses compressed air to blow water, the surface cooler antifreeze component in this embodiment can fundamentally avoid the risk of freezing and cracking of the surface cooler 20, without consuming additional energy, and can effectively utilize existing space for the arrangement of the first duct 51 or the second duct 52, improving space utilization.

[0040] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A surface cooler antifreeze assembly, characterized in that, include: A first duct (51) or a second duct (52) is provided. The two ends of the first duct (51) are respectively connected to the two sides of the surface cooler (20) to guide the mixed airflow in the primary filter (10) across the surface cooler (20) to the fan (30). One end of the second duct (52) is connected between the surface cooler (20) and the fan (30). The second duct (52) is capable of mixing the airflow and guiding the mixed airflow across the primary filter (10) and the surface cooler (20) to the fan (30).

2. The surface cooler antifreeze assembly according to claim 1, characterized in that, It also includes thermal insulation material (201). When using the first air duct (51), the thermal insulation material (201) is provided on both sides of the surface cooler (20). When using the second air duct (52), the thermal insulation material (201) is provided on the side of the surface cooler (20) closer to the fan (30).

3. The surface cooler antifreeze assembly according to claim 2, characterized in that, The first air duct (51) has an inlet end and an outlet end at both ends. The inlet end is located between the primary filter (10) and the insulation material (201), and the outlet end is located between the fan (30) and the insulation material (201). The mixed airflow in the primary filter (10) enters from the inlet end and exits from the outlet end.

4. The surface cooler antifreeze assembly according to claim 3, characterized in that, Both the inlet and outlet ends are equipped with air valves to control the opening and closing of both ends of the first air duct (51).

5. The surface cooler antifreeze assembly according to claim 2, characterized in that, The second air duct (52) is provided with a second fresh air inlet (521), a second return air inlet (522) and an air outlet (523). The second fresh air inlet (521) is used to deliver fresh air, the second return air inlet (522) is used to deliver return air, and the air outlet (523) is located between the fan (30) and the insulation material (201). Fresh air and return air are mixed in the second air duct (52) and then discharged from the air outlet (523).

6. The surface cooler antifreeze assembly according to claim 5, characterized in that, A duct pre-filter (60) is provided in the second air duct (52). The duct pre-filter (60) is used to mix the fresh air introduced by the second fresh air inlet (521) and the return air introduced by the second return air inlet (522). The duct pre-filter (60) is located between the second return air inlet (522) and the air outlet (523).

7. The surface cooler antifreeze assembly according to claim 6, characterized in that, The second fresh air inlet (521), the second return air inlet (522), and the air outlet (523) are all equipped with air valves to control the opening and closing of the second air duct (52).

8. A modular air conditioning unit, characterized in that, The unit includes the surface cooler antifreeze assembly as described in any of claims 1-7 and a primary filter (10), surface cooler (20), fan (30), medium-efficiency filter (40), and access door (100) arranged horizontally in sequence. The surface cooler antifreeze assembly is located at the surface cooler (20) to avoid the use of the surface cooler (20) and ensure the operation of the combined air conditioning unit.

9. The combined air conditioning unit according to claim 8, characterized in that, It is also provided with a first fresh air inlet (101), a first return air inlet (102) and an air supply outlet (103). The primary filter (10) can mix the fresh air introduced by the first fresh air inlet (101) and the return air introduced by the first return air inlet (102) and deliver them to the surface cooler (20). The air supply outlet (103) can discharge the mixed airflow in the medium-efficiency filter (40).

10. The combined air conditioning unit according to claim 8, characterized in that, When the first duct (51) in the surface cooler antifreeze assembly is used, the mixed airflow of the primary filter (10) can be directly delivered to the fan (30) across the surface cooler (20); when the second duct (52) in the surface cooler antifreeze assembly is used, the fresh air and return air are mixed through the second duct (52) and directly delivered to the fan (30) across the primary filter (10) and the surface cooler (20).

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