Air inlet structure and air conditioner

Abstract

The utility model relates to an air inlet structure and an air conditioner. The utility model relates to an air inlet structure, which comprises a shell, a heat exchanger, a heat exchanger, an air inlet pipe, an air outlet pipe, an air outlet pipe, an air inlet pipe and an air outlet pipe, a fan is arranged in the fan cavity, an air cavity air outlet is formed in the partition plate, and the air outlet end of the fan is connected with the air cavity air outlet so that airflow can flow into the heat exchange cavity from the fan cavity; a first air return inlet is formed in the outer wall of the heat exchange cavity and is close to the air cavity air outlet. And in the working state of the fan, the air cavity air outlet blows air to drive airflow outside the shell to enter the heat exchange cavity through the first return air inlet. According to the air inlet structure, fresh air and return air are controlled by one fan, meanwhile, the normally-open air inlet is formed, air flows are driven by air outlet of the fan to be added into an air path through the air inlet, and the purpose of increasing the air volume is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to an air inlet structure and an air conditioner. Background Art

[0002] At present, air conditioners with fresh air function need to ensure sufficient heating capacity while controlling the opening and closing of the air inlet to achieve flexible control, which requires increasing the air volume. There are two common methods to increase the air volume: one solution is to use a fan with a larger rated power, but actually only use a smaller power, which can solve the noise problem, but because of the use of a fan with a large rated power, resources are wasted and the cost is significantly increased; another solution is to increase the power of the fan, or use multiple fans. In this case, the noise will increase greatly, affecting the user experience. Utility Model Content

[0003] Based on this, the purpose of the utility model is to provide an air intake structure, in which the fresh air and return air share a fan for control, and a normally open air inlet is set at the same time. The air outlet of the fan drives the airflow through the air inlet to join the air path, so as to achieve the purpose of increasing the air volume.

[0004] Another object of the utility model is to provide an air conditioner, which increases the air volume by setting an air inlet structure, thereby increasing the heating amount of the air conditioner and effectively reducing noise.

[0005] An air inlet structure, comprising:

[0006] A shell having a partition plate therein, which divides the shell into adjacent fan chambers and heat exchange chambers;

[0007] The partition plate is provided with an air cavity outlet, the fan chamber is provided with a fan, and the air outlet end of the fan is conductively connected with the air cavity outlet;

[0008] A first return air inlet is provided on the outer wall of the heat exchange chamber, and the first return air inlet is arranged close to the air cavity outlet. When the fan is in a working state, air blown from the air cavity outlet drives the air flow outside the shell to enter the heat exchange chamber through the first return air inlet.

[0009] Furthermore, a heat exchanger is arranged in the heat exchange chamber, and the air cavity outlet and the first return air inlet are both arranged at the air inlet end of the heat exchanger and are spaced a certain distance from the heat exchanger;

[0010] The first return air inlet is directly opposite to the air inlet end of the heat exchanger; the air cavity outlet is located between the first return air inlet and the heat exchanger, and the air outlet airflow direction of the air cavity outlet forms an angle less than or equal to 90° with the air inlet airflow direction of the first return air inlet.

[0011] Furthermore, the air outlet end of the fan is arranged at an angle so that the air outlet airflow direction of the fan chamber forms an angle less than 90° with the air inlet end of the heat exchanger.

[0012] Furthermore, the heat exchange chamber is provided with an air guide wall, which is inclined toward the air inlet end of the heat exchanger, with one end connected to the edge of the air cavity outlet and the other end close to the air inlet end of the heat exchanger.

[0013] Furthermore, the first return air inlet is arranged on the air guide wall; taking the plane parallel to the air outlet of the air cavity as the cross-section, the cross-sectional width of the air guide wall is greater than the width of the air outlet of the air cavity.

[0014] Furthermore, the air inlet structure further includes:

[0015] At least one set of fresh air components, wherein the fresh air components include a fresh air inlet connected to outdoor fresh air;

[0016] At least one set of return air components, the return air components including a second return air inlet communicating with indoor return air;

[0017] The fresh air inlet and the second return air inlet are both opened on the outer wall of the fan chamber.

[0018] Furthermore, the first return air inlet and the second return air inlet are both arranged at the bottom of the shell, and the minimum distance between the first return air inlet and the second return air inlet is 0.64 to 1.1 times the diameter of the fan impeller.

[0019] Furthermore, the fresh air component further comprises a fresh air valve, and the fresh air valve is arranged at the fresh air inlet;

[0020] The return air assembly comprises a return air valve, and the return air valve is arranged at the second return air inlet;

[0021] When the fan is in working state, the fresh air valve and the return air valve can be opened separately or simultaneously.

[0022] Furthermore, an air valve is provided at the first return air inlet for controlling the air intake volume of the first return air inlet.

[0023] An air conditioner comprises: the air inlet structure described in the utility model.

[0024] The beneficial effects of the utility model are:

[0025] (1) Fresh air and return air share the same fan. By setting fresh air valves and return air valves respectively, the ratio of fresh air and return air can be adjusted as needed to save energy;

[0026] (2) A normally open first return air inlet is provided, and the air flow is driven by the air outlet of the fan to join the air path through the air inlet, thereby achieving the purpose of increasing the air volume;

[0027] (3) By arranging the first return air inlet outside the vertical stretching space of the air cavity outlet, the irregular movement of the airflow caused by the collision between the airflow blown out through the air cavity outlet and the airflow entering through the first return air inlet is reduced, thereby affecting the airflow velocity;

[0028] (4) Increase the airflow velocity by designing the airflow path for diversion and guidance.

[0029] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 An exploded view of the structure of an air conditioner provided in an embodiment of the present application;

[0031] Figure 2 A schematic diagram of the structure of the air inlet structure provided in the embodiment of the present application Figure 1 ;

[0032] Figure 3 Schematic diagram of airflow direction of the air inlet structure provided in the embodiment of the present application:

[0033] Figure 4 A schematic diagram of the structure of the air inlet structure provided in the embodiment of the present application Figure 2 ;

[0034] Figure 5 The structure diagram of the air inlet structure Figure 3 ;

[0035] Figure 6 A cross-sectional view of the air inlet structure provided in an embodiment of the present application;

[0036] Figure 7 for Figure 6 A partial enlarged view of FIG.

[0037] Figure 8 This is a schematic diagram of the assembly of the fresh air valve provided in an embodiment of the present application.

[0038] In the figure, 100-air inlet structure; 10-shell; 11-bottom cover; 12-face cover; 13-partition; 131-air cavity outlet; 14-fan chamber; 141-fan; 15-heat exchange chamber; 151-first return air inlet; 152-air guide plate; 153-air guide wall; 20-fresh air assembly; 21-fresh air inlet; 211-step surface; 22-fresh air valve; 221-baffle; 222-rotating shaft; 23-filter element; 30-return air assembly; 31-second return air inlet; 32-return air valve; 200-heat exchanger. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] In the description of the present invention, it should be noted that the terms "vertical direction", "upper", "lower", "horizontal" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, or a connection through an intermediate medium, or the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Currently, there are two common methods to increase the air volume of air conditioners with fresh air function: one solution is to use a fan with a larger rated power, but actually only use a smaller power, which can solve the noise problem. However, since a fan with a large rated power is used, resources are wasted and the cost is significantly increased. Another solution is to increase the power of the fan, or use multiple fans. In this case, the noise will increase greatly, affecting the user experience.

[0043] Based on this, an embodiment of the present application provides an air intake structure in which fresh air and return air share a fan for control, and a normally open air inlet is set on the air path. The air outlet of the fan drives the airflow through the air inlet and joins the air path, thereby achieving the purpose of increasing the air volume and reducing noise.

[0044] See also Figure 1-3The present embodiment provides an air intake structure, comprising: a housing 10, a partition 13 is provided in the housing 10, and the housing 10 is divided into adjacent fan chambers 14 and heat exchange chambers 15. A fan 141 is provided in the fan chamber 14, and a wind chamber outlet 131 is provided in the partition 13; a heat exchanger 200 is arranged in the heat exchange chamber 15. The air outlet end of the fan 141 is conductively connected to the wind chamber outlet 131, and is used to blow air from the fan chamber 14 into the heat exchange chamber 15 for heating.

[0045] Specifically, in the present embodiment, the housing 10 includes a bottom cover 11 and a surface cover 12 which are interlocked with each other, the bottom cover 11 is provided with a groove, and the surface cover 12 is provided at the notch of the groove. The partition 13 is vertically arranged between the bottom cover 11 and the surface cover 12, and is surrounded by the surface cover 12 and the bottom cover 11 to form a fan chamber 14 for accommodating a fan 141. The heat exchange chamber 15 adjacent to the fan chamber 14 is used to accommodate a heat exchanger 200. It should be noted that the setting of the housing 10 can be set according to the actual application scenario, and is not limited thereto. Preferably, the fan 141 in the embodiment of the present application is a centrifugal fan.

[0046] See also Figure 1-4 Furthermore, the outer wall of the heat exchange chamber 15 is provided with a first return air inlet 151, for the airflow to enter the heat exchange chamber 15 through the first return air inlet 151 to replenish the air volume. Specifically, the first return air inlet 151 is arranged near the air cavity outlet 131, and is located outside the air outlet path of the air cavity outlet 131. When the fan 141 is working, the airflow is blown out through the air cavity outlet 131 into the heat exchange chamber 15 and enters the heat exchanger 200 for heating; when the airflow flows near the first return air inlet 151, due to the high flow rate of the airflow, it will drive the air near the first return air inlet 151 to flow, and blow the air near the first return air inlet 151 into the heat exchanger 200, so that the air pressure near the first return air inlet 151 near the heat exchanger 200 is reduced, and the air outside the shell 10 enters the heat exchange chamber 15 through the first return air inlet 151 for replenishment, thereby increasing the air volume entering the heat exchanger 200. Compared with the traditional method of increasing the air volume by increasing the power of the fan or increasing the number of fans, the air intake structure 100 provided in the embodiment of the present application can effectively increase the air volume and reduce noise when the power of the fan 141 is fixed.

[0047] See also Figure 2-4 In some embodiments, the air cavity outlet 131 and the first return air inlet 151 are both arranged at the air inlet end of the heat exchanger 200, and are separated from the heat exchanger 200 by a certain distance, thereby forming a first air flow path from the air cavity outlet 131 to the heat exchanger 200 and a second air flow path from the first return air inlet 151 to the heat exchanger 200.

[0048] See also Figure 2As an example, in this embodiment, the first return air inlet 151 is arranged on the side wall of the heat exchange chamber 15 opposite to the air inlet end of the heat exchanger 200, and the air cavity outlet 131 is arranged between the first return air inlet 151 and the heat exchanger 200. The outlet air flow direction forms a certain angle ɑ with the inlet air flow direction of the first return air inlet 151, and the angle ɑ is less than or equal to 90 degrees. In this way, the air flow between the first return air inlet 151 and the heat exchanger 200 can be effectively taken away, thereby increasing the air volume entering the heat exchanger 200.

[0049] As an example, in this embodiment, the air outlet end of the fan 141 is tilted so that the outlet air flow direction of the fan chamber 14 is tilted toward the air inlet end of the heat exchanger 200. The outlet air flow direction forms a certain angle β with the air inlet end of the heat exchanger 200, and the angle β is less than 90 degrees. In this way, it can be ensured that the airflow blown out of the fan chamber 14 drives the airflow near the first return air inlet 151 to enter the heat exchanger 200 for heating.

[0050] Preferably, the vertical stretching space of the first return air inlet 151 is located outside the vertical stretching space of the wind cavity outlet 131, that is, the vertical stretching space of the first return air inlet 151 does not overlap with the vertical stretching space of the wind cavity outlet 131. This can reduce the collision between the airflow blown out through the wind cavity outlet 131 and the airflow entering through the first return air inlet 151, which may cause irregular movement of the airflow and affect the airflow velocity.

[0051] See also Figure 3-5 Further, in some embodiments, a plurality of spaced air guide plates 152 are provided in the heat exchange chamber 15, one end of the air guide plate 152 faces the air cavity outlet 131, and the other end faces the air inlet end of the heat exchanger 200, and is used to guide the airflow blown out through the air cavity outlet 131 to the heat exchanger 200. Preferably, the cross section of the air guide plate 152 is arc-shaped, so that the airflow is guided more smoothly.

[0052] See also Figure 4-7 Furthermore, in some embodiments, the wall surface of the heat exchange chamber 15 opposite to the air inlet end of the heat exchanger 200 is defined as an air guide wall 153, and the air guide wall 153 is inclinedly arranged on a side facing the heat exchanger 200, with one end thereof being connected to the edge of the air cavity outlet 131, and the other end being close to the air inlet end of the heat exchanger, so that the distance between the air inlet end of the heat exchanger 200 and the wall surface becomes narrower and narrower along the air flow direction, thereby preventing the air flow at the tail end of the first air flow path from being diffused due to the reduction in air flow velocity, thereby avoiding the reduction in heating capacity due to the reduction in air flow entering the heat exchanger 200.

[0053] See also Figure 6 and Figure 7Preferably, the first return air inlet 151 is arranged on the air guide wall 153, with the plane parallel to the air cavity outlet 131 as the cross-section. The cross-sectional width of the air guide wall 153 is greater than the width of the air cavity outlet 131, which can effectively prevent the airflow blown out by the fan 141 from escaping from the first return air inlet 151 and affecting the heating amount.

[0054] In some embodiments, the height of the air guide plate 152 is greater than the cross-sectional width of the air cavity outlet 131, so that the air guide plate 152 partially protrudes above the first return air inlet 151, which can further prevent the airflow from being dispersed toward the first return air inlet 151 due to the reduced flow rate after the airflow is blown out to the heat exchange chamber 15 through the air cavity outlet 131, thereby affecting the air intake of the first return air inlet 151. At the same time, multiple air guide plates 152 arranged at intervals also divert and guide the airflow entering through the first return air inlet 151 to increase the flow rate of the airflow.

[0055] See also Figure 3 and Figure 4 Furthermore, the air intake structure 100 also includes at least one group of fresh air components 20 and at least one group of return air components 30. The fresh air component 20 includes a fresh air inlet 21 opened on the outer wall of the fan chamber 14, and the fresh air inlet 21 is connected to the outdoor fresh air and is used to inhale the outdoor fresh air. The return air component 30 includes a second return air inlet 31 opened on the outer wall of the fan chamber 14, which is used to inhale indoor return air. Preferably, the fresh air inlet 21 is arranged on the side wall of the fan chamber 14, so that there is enough space to connect the pipeline; the second return air inlet 31 is arranged at the bottom of the fan chamber 14, and the indoor return air enters the fan chamber 14 through the second return air inlet 31 at the bottom, which can effectively reduce its installation space.

[0056] See also Figure 5 It can be understood that, under this setting, as a preference, the first return air inlet 151 is also arranged at the bottom of the heat exchange chamber 15, and the minimum distance between the first return air inlet and the second return air inlet is defined as L. When L is 0.64 to 1.1 times the diameter of the fan impeller, the vortex at the second return air inlet 31 and the air cavity outlet 131 can be effectively avoided, and the air flow backflow of the air cavity outlet 131 can be significantly improved, thereby ensuring the air intake of the first return air inlet 151.

[0057] Furthermore, in some embodiments, the fresh air component 20 further includes a fresh air valve 22, which is disposed at the fresh air inlet 21 and is used to control the amount of fresh air entering the fan chamber 14. As an example, in this embodiment, the fresh air inlet 21 is a circular through hole, and the fresh air valve 22 is a circular air valve adapted to the fresh air inlet 21. The fresh air valve 22 includes a circular baffle 221 and a stepper motor, and the circular baffle 221 is embedded in the through hole of the fresh air inlet 21; the circular baffle 221 is fixedly connected to the output end of the stepper motor through a rotating shaft 222, and the circular baffle 221 is driven to rotate by the stepper motor.

[0058] See also Figure 4 and Figure 8 In some embodiments, the inner wall of the fresh air inlet 21 is provided with two step surfaces 211 facing each other with the rotating shaft 222 as the center line, and the height difference between the two step surfaces 211 is the thickness of the circular baffle 221. When the two sides of the circular baffle 221 are respectively and simultaneously in contact with the two step surfaces 211, the fresh air inlet 21 is in a closed state; when the circular baffle 221 is perpendicular to the plane of the fresh air inlet 21, the air intake of the fresh air valve 22 is the largest. It can be understood that this setting is only one embodiment of the fresh air component 20. In other embodiments, the fresh air valve 22 can also be a valve structure with multiple blades opening and closing, or other valve structures for controlling the amount of fresh air entering the fan chamber 14 through the fresh air inlet 21, but it is not limited to this.

[0059] Furthermore, in some embodiments, the fresh air assembly 20 further includes a filter 23 disposed between the fresh air inlet 21 and the fan 141 for purifying the fresh air. It is understood that the filter 23 may be a single filter or a combination of multiple identical or different filters, for example, a filter composed of a primary filter and a high efficiency filter.

[0060] Furthermore, in some embodiments, the return air assembly 30 further includes a return air valve 32 for controlling the amount of return air entering the fan chamber 14 through the second return air inlet 31. The return air valve 32 may be arranged in the same manner as the fresh air valve 22, or may be arranged differently, which will not be described in detail herein.

[0061] It is understandable that the fresh air valve 22 and the return air valve 32 can be opened simultaneously or separately, and the specific valve opening is determined according to the indoor air quality. This can avoid excessive intake of fresh air and consumption of more energy.

[0062] See also Figure 1-4The embodiment of the present application also provides an air conditioner, including an air intake structure 100, which is arranged on the air intake side of the heat exchanger 200, blows outdoor fresh air and / or indoor return air into the heat exchanger 200 for heating, and then blows it into the room through the air outlet side of the heat exchanger 200 to achieve indoor heating. The air intake structure 100 can adjust the ratio of the fresh air volume and the return air volume according to the indoor air quality. At the same time, by setting a first return air inlet 151, the air volume can be increased and the heating amount can be improved while maintaining the power of the existing fan 141.

[0063] Compared with the prior art, the beneficial effects of the embodiments of the present application are:

[0064] (1) Fresh air and return air share the same fan. By setting fresh air valves and return air valves respectively, the ratio of fresh air and return air can be adjusted as needed to save energy;

[0065] (2) A normally open first return air inlet is provided, and the air flow is driven by the air outlet of the fan to join the air path through the air inlet, thereby achieving the purpose of increasing the air volume;

[0066] (3) By arranging the first return air inlet outside the vertical stretching space of the air cavity outlet, the irregular movement of the airflow caused by the collision between the airflow blown out through the air cavity outlet and the airflow entering through the first return air inlet is reduced, thereby ensuring the airflow velocity;

[0067] (4) Increase the airflow velocity by designing the airflow path for diversion and guidance.

[0068] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and the utility model is also intended to include these modifications and modifications.

Claims

1. An air inlet structure, characterized in that: include: A shell having a partition plate therein, which divides the shell into adjacent fan chambers and heat exchange chambers; The partition plate is provided with an air cavity outlet; a fan is arranged in the fan chamber, and the air outlet end of the fan is conductively connected with the air cavity outlet; A first return air inlet is provided on the outer wall of the heat exchange chamber, and the first return air inlet is arranged close to the air cavity outlet. When the fan is in a working state, air blown from the air cavity outlet drives the air flow outside the shell to enter the heat exchange chamber through the first return air inlet.

2. The air inlet structure according to claim 1, characterized in that: A heat exchanger is arranged in the heat exchange chamber, and the air cavity outlet and the first return air inlet are both arranged at the air inlet end of the heat exchanger and are spaced a certain distance from the heat exchanger; The first return air inlet is directly opposite to the air inlet end of the heat exchanger; the air cavity outlet is located between the first return air inlet and the heat exchanger, and the air outlet airflow direction of the air cavity outlet forms an angle less than or equal to 90° with the air inlet airflow direction of the first return air inlet.

3. The air inlet structure according to claim 2, characterized in that: The air outlet end of the fan is tilted so that the air outlet airflow direction of the fan chamber forms an angle less than 90° with the air inlet end of the heat exchanger.

4. The air inlet structure according to claim 3, characterized in that: The heat exchange chamber is provided with an air guide wall, which is inclined toward the air inlet end of the heat exchanger, with one end connected to the edge of the air cavity outlet and the other end close to the air inlet end of the heat exchanger.

5. The air inlet structure according to claim 4, characterized in that: The first return air inlet is arranged on the wind guide wall; taking the plane parallel to the air outlet of the air cavity as the cross section, the cross-sectional width of the wind guide wall is greater than the width of the air outlet of the air cavity.

6. The air inlet structure according to claim 1, characterized in that: Also includes: At least one set of fresh air components, wherein the fresh air components include a fresh air inlet connected to outdoor fresh air; At least one set of return air components, the return air components including a second return air inlet communicating with indoor return air; The fresh air inlet and the second return air inlet are both opened on the outer wall of the fan chamber.

7. The air inlet structure according to claim 6, characterized in that: The first return air inlet and the second return air inlet are both arranged at the bottom of the shell, and the minimum distance between the first return air inlet and the second return air inlet is 0.64 to 1.1 times the diameter of the fan impeller.

8. The air inlet structure according to claim 6, characterized in that: The fresh air component further includes a fresh air valve, and the fresh air valve is arranged at the fresh air inlet; The return air assembly comprises a return air valve, and the return air valve is arranged at the second return air inlet; When the fan is in working state, the fresh air valve and the return air valve can be opened separately or simultaneously.

9. The air inlet structure according to claim 1, characterized in that: The first return air inlet is provided with an air valve for controlling the air intake volume of the first return air inlet.

10. An air conditioner, characterized in that: include: The air inlet structure according to any one of claims 1 to 9.

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