An indoor unit for air conditioning and an air conditioner

Abstract

This utility model provides an indoor air conditioning unit and an air conditioner, including a housing with an air inlet and an air outlet. When the indoor air conditioning unit is working, a low-pressure zone is formed outside the air inlet. The indoor air conditioning unit also includes a ventilation device, which includes a fresh air duct and an exhaust air duct. The fresh air duct includes a fresh air inlet and a fresh air outlet, and the exhaust air duct includes an exhaust air inlet and an exhaust air outlet. The fresh air inlet is located outdoors, and the fresh air outlet is located in the low-pressure zone. The exhaust air outlet is located outdoors, and some of the air discharged from the air outlet can enter the exhaust air inlet, thereby achieving indoor and outdoor ventilation without adding an extra motor.

Description

Technical Field

[0001] This utility model belongs to the field of air conditioning technology, specifically relating to an indoor air conditioning unit and an air conditioner. Background Technology

[0002] When users use traditional air conditioners to regulate indoor air temperature and humidity, they typically only circulate the existing air. With the indoor space relatively closed for extended periods and lacking fresh air replenishment, indoor air quality gradually declines, impacting user experience and comfort. Fresh air systems can provide fresh air to the indoor space, improving indoor air quality.

[0003] However, existing fresh air systems require an additional motor to drive them in order to exchange indoor and outdoor air. This additional motor results in a larger overall size for the air conditioner, which is detrimental to the overall interior layout; moreover, the additional motor leads to increased power consumption and noise.

[0004] How to achieve indoor and outdoor ventilation without adding extra motors is a technical problem that urgently needs to be solved. Utility Model Content

[0005] Therefore, this utility model provides an indoor air conditioning unit and an air conditioner that can achieve indoor and outdoor ventilation without adding an extra motor.

[0006] On one hand, this utility model provides an indoor air conditioner unit, including a casing with an air inlet and an air outlet. When the indoor air conditioner unit is working, a low-pressure zone is formed outside the air inlet. The indoor air conditioner unit also includes a ventilation device, which includes a fresh air duct and an exhaust air duct. The fresh air duct includes a fresh air inlet and a fresh air outlet, and the exhaust air duct includes an exhaust air inlet and an exhaust air outlet. The fresh air inlet is located outdoors, and the fresh air outlet is located in the low-pressure zone. The exhaust air outlet is located outdoors, and some of the air discharged from the air outlet can enter the exhaust air inlet.

[0007] In some embodiments, the exhaust inlet is provided with a flared structure, the flared structure including a diverter plate, and part of the air discharged from the air outlet is guided by the diverter plate into the exhaust channel.

[0008] In some embodiments, a cross-flow fan blade is provided inside the housing, the air outlet is elongated, and the exhaust inlet is located at one end of the air outlet.

[0009] In some embodiments, at least one centrifugal fan is provided inside the housing, and the exhaust inlet is opposite to the outlet of the centrifugal fan.

[0010] In some embodiments, in the axial direction of the centrifugal fan, the outlet size of the centrifugal fan is L, and the size of the flared structure is L1, where 0.1 ≤ L1 / L < 1.

[0011] In some embodiments, the plane passing through the end point of the centrifugal fan outlet in the axial direction and perpendicular to the rotation axis of the centrifugal fan is plane P, and the maximum distance between the diverter plate and plane P is L2, 0.1≤L2 / L1≤0.2.

[0012] In some embodiments, the air exchange device includes a heat exchange section, and the fresh air duct and the exhaust air duct are thermally coupled through the heat exchange section.

[0013] In some embodiments, the air exchange device includes a housing, the heat exchange section is disposed inside the housing, and the housing is fixed to the casing.

[0014] In some embodiments, a fresh air valve is provided in the fresh air duct, and an exhaust valve is provided in the exhaust air duct.

[0015] On the other hand, this utility model also provides an air conditioner, including the aforementioned indoor air conditioner unit.

[0016] When the indoor unit of this air conditioner is working, a low-pressure zone is formed outside the air inlet. The indoor unit also includes a ventilation device, which includes a fresh air duct and an exhaust air duct. The fresh air duct includes a fresh air inlet and a fresh air outlet, and the exhaust air duct includes an exhaust air inlet and an exhaust air outlet. The fresh air inlet is located outdoors, and the fresh air outlet is located in the low-pressure zone. The exhaust air outlet is located outdoors, and some of the air discharged from the outlet can enter the exhaust air inlet. In this way, the mutual flow of indoor and outdoor air can be achieved without the need for an additional motor drive, saving energy and reducing noise. Attached Figure Description

[0017] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of an air conditioner indoor unit equipped with a ventilation device according to an embodiment of this utility model; Figure 2 This is an embodiment of the present utility model. Figure 1 The left view; Figure 3 This is a schematic diagram showing the first interaction between the air exchange device and the centrifugal fan in an embodiment of this utility model; Figure 4 This is a schematic diagram showing the relationship between the air exchange device and the centrifugal fan in an embodiment of this utility model; Figure 5 This is an embodiment of the present utility model. Figure 4 Enlarged view of point A in the middle; Figure 6 This is a schematic diagram of an air conditioner of the present invention that is a ceiling-mounted type; Figure 7 This is an embodiment of the present utility model. Figure 6 The left view; Figure 8 This is a schematic diagram showing the exhaust inlet of the ventilation device in this embodiment of the present invention and the outlet of the centrifugal fan at the end. Figure 9 This is a schematic diagram showing the exhaust inlet of the ventilation device in this embodiment of the present invention facing the outlet of the centrifugal fan in the middle; Figure 10 This is a schematic diagram of the fresh air outlet of the ventilation device in this embodiment of the present invention being opposite to the inlet of the centrifugal fan near the inner side; Figure 11 This is a first-view perspective perspective view of the ventilation device according to an embodiment of the present utility model; Figure 12 This is a second-view perspective perspective view of the ventilation device according to an embodiment of the present utility model; Figure 13 This is an exploded view of the ventilation device according to an embodiment of this utility model; Figure 14 This is a front view of the ventilation device according to an embodiment of the present utility model; Figure 15 This is an embodiment of the present utility model. Figure 14 The left view; Figure 16 This is an embodiment of the present utility model. Figure 14 The right view; Figure 17 This is an embodiment of the present utility model. Figure 14 Top view; Figure 18 This is an embodiment of the present utility model. Figure 14 A bottom view; The attached figures are labeled as follows: 1. Casing; 101. Air inlet; 102. Air outlet; 201. Fresh air inlet; 202. Fresh air outlet; 301. Exhaust air inlet; 302. Exhaust air outlet; 4. Flared structure; 401. Diverter plate; 5. Centrifugal fan; 6. Heat exchange section; 7. Shell. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0020] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0021] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0022] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0023] When users use traditional air conditioners to regulate indoor air temperature and humidity, they typically only circulate the existing air. With the indoor space relatively closed for extended periods and lacking fresh air replenishment, indoor air quality gradually declines, impacting user experience and comfort. Fresh air systems can provide fresh air to the indoor space, improving indoor air quality.

[0024] However, existing fresh air systems have the following shortcomings: Current technologies often use fresh air motors to drive the system, enabling indoor and outdoor air exchange. However, this approach suffers from high energy consumption, complex structure, and high noise levels. For example, in wall-mounted or ceiling-mounted air conditioners, the fresh air motor occupies valuable space, affecting the overall design, and increases weight when wall-mounted or ceiling-mounted.

[0025] To resolve some of the aforementioned issues, please refer to [reference needed]. Figure 1-18 As shown, this utility model provides an indoor air conditioner unit, including a housing 1. The housing 1 is provided with an air inlet 101 and an air outlet 102. When the indoor air conditioner unit is working, a low-pressure zone is formed outside the air inlet 101. The indoor air conditioner unit also includes a ventilation device, which includes a fresh air duct and an exhaust air duct. The fresh air duct includes a fresh air inlet 201 and a fresh air outlet 202. The exhaust air duct includes an exhaust air inlet 301 and an exhaust air outlet 302. The fresh air inlet 201 is located outdoors, and the fresh air outlet 202 is located in the low-pressure zone. The exhaust air outlet 302 is located outdoors, and some of the air discharged from the air outlet 102 can enter the exhaust air inlet 301.

[0026] With the above setup, the process of introducing fresh air is as follows: the indoor unit of the air conditioner operates, indoor air enters through the air inlet 101 and exits through the air outlet 102; when the air enters through the air inlet 101, a low-pressure area is formed outside the air inlet 101. Since the fresh air outlet 202 is located in the low-pressure area, it creates a suction effect on the fresh air duct. Outdoor fresh air enters the fresh air duct through the fresh air inlet 201 and enters the room through the fresh air outlet 202. Figure 1 The solid line represents the flow path of fresh air entering the room. After entering the room, the fresh air enters the low-pressure zone and then enters the indoor unit of the air conditioner from the air inlet 101. There, it mixes with the indoor air and is then blown out from the air outlet 102. Thus, firstly, fresh air can be introduced without an additional motor; secondly, the mixing of the introduced fresh air with the indoor air in the air conditioner before entering the room avoids excessive temperature differences between the fresh air and the indoor air, preventing user discomfort; thirdly, the fresh air entering the room after passing through the air conditioner's indoor unit allows for filtration using existing filters, improving fresh air quality; and fourthly, the fresh air entering the room after being cooled or heated by the air conditioner's indoor unit further improves indoor temperature stability and enhances the user experience. The process of expelling stale air: When the air conditioner's indoor unit is working, some air discharged from the air outlet 102 of the casing 1 enters the exhaust inlet 301, where indoor air (stale air) is mixed with the indoor air. Figure 1(The dashed line indicates the airflow path for the stale air to be discharged outdoors.) Air entering the exhaust inlet 301 from the air outlet 102 can be discharged outdoors through the exhaust outlet 302 of the exhaust duct. This achieves the discharge of indoor air without the need for an additional motor. The above configuration achieves bidirectional ventilation, saving energy and reducing noise. Compared to using an additional motor, the overall size of the air conditioner indoor unit of this application is smaller, the structure is simpler, and the applicability of the air conditioner indoor unit is improved.

[0027] Preferred, such as Figure 2 , Figure 3 , Figure 4 , Figures 11-18 As shown, the exhaust inlet 301 is provided with a flared structure 4, which includes a diverter plate 401. Part of the air discharged from the outlet 102 is guided by the diverter plate 401 and enters the exhaust channel.

[0028] By setting the flared structure 4, which includes a diverter plate 401, the exhaust speed entering the exhaust duct can be increased. The increased exhaust speed can accelerate the entry of indoor air into the exhaust duct through the exhaust outlet 302, which is beneficial to improving exhaust efficiency.

[0029] Preferably, the housing 1 is provided with a cross-flow fan blade, the air outlet 102 is elongated, and the exhaust inlet 301 is located at one end of the air outlet 102.

[0030] By setting cross-flow fan blades, the air outlet 102 is made into a long strip shape, and the exhaust inlet 301 is located at one end of the air outlet 102, which reduces the impact of the exhaust duct on the normal air output of the air conditioner indoor unit.

[0031] Preferred, such as Figure 1 , Figure 3 , Figure 4 , Figure 5 As shown, at least one centrifugal fan 5 is provided inside the housing 1, and the exhaust inlet 301 is opposite to the outlet of the centrifugal fan 5.

[0032] By setting centrifugal fan 5, the air velocity at the outlet 102 is relatively high, and the air velocity entering the exhaust inlet 301 is also relatively fast, which can exhaust air more quickly.

[0033] Furthermore, multiple centrifugal fans 5 can be installed, and each centrifugal fan 5 can be driven by one or more motors. The exhaust outlet 302 can be opposite the outlet of any one of the centrifugal fans 5. The exhaust inlet 301 can be located at the outlet of the outermost centrifugal fan 5.

[0034] Preferred, such as Figure 3 , Figure 4 , Figure 5As shown, in the axial direction of the centrifugal fan 5, the outlet size of the centrifugal fan 5 is L, and the size of the flared structure 4 is L1, 0.1≤L1 / L<1.

[0035] like Figure 3 and Figure 4 As shown, by ensuring that 0.1≤L1 / L<1, the flared structure 4 is too large and occupies too much indoor space, while still maintaining exhaust efficiency.

[0036] Preferred, such as Figure 3 , Figure 4 , Figure 5 As shown, the plane that passes through the outlet of the centrifugal fan 5 at one end in the axial direction and is perpendicular to the rotation axis of the centrifugal fan 5 is plane P. The maximum distance between the diverter plate 401 and plane P is L2, where 0.1≤L2 / L1≤0.2.

[0037] like Figure 3 and Figure 4 As shown, by ensuring 0.1 ≤ L2 / L1 ≤ 0.2, the centrifugal fan 5 operates such that the air blown out by the centrifugal fan 5 enters the exhaust inlet 301. Simultaneously, the larger area of ​​the exhaust inlet 301 is not opposite the air outlet 102. According to Bernoulli's principle, when gas flows in the duct, a negative pressure zone is formed at the air inlet 101. This allows indoor air to enter the exhaust duct directly under the negative pressure formed near the exhaust inlet 301 without passing through the indoor air conditioning unit, thus improving exhaust efficiency. When the indoor air conditioning unit is heating or cooling, this reduces the loss of cooling and heating capacity.

[0038] Preferred, such as Figure 1 , Figure 3 , Figure 4 As shown, the air exchange device includes a heat exchange section 6, and the fresh air duct and the exhaust air duct are thermally coupled through the heat exchange section 6.

[0039] There is a temperature difference between the air exhausted from indoors and the fresh air entering from outdoors. By setting up a heat exchange unit 6, the exhaust air and fresh air can exchange heat, which saves energy and improves the user experience.

[0040] Furthermore, the heat exchange section 6 can be a total heat exchanger.

[0041] Preferred, such as Figure 1 As shown, the air exchange device includes a housing 7, the heat exchange part 6 is disposed inside the housing 7, and the housing 7 is fixed on the casing 1.

[0042] The heat exchange device is installed inside the housing 7 and fixed to the casing 1 by the housing 7, which improves the firmness and convenience of fixing the air exchange device.

[0043] Preferably, a fresh air valve is provided in the fresh air duct, and an exhaust valve is provided in the exhaust air duct.

[0044] By installing fresh air valves and exhaust air valves, when the indoor unit of the air conditioner is turned on, the system can control whether to exhaust stale indoor air or supply fresh air into the room. This can prevent heat or cooling loss generated by the operation of the indoor unit.

[0045] Furthermore, the exhaust valve is located at the exhaust inlet 301, and the fresh air valve is located at the fresh air inlet 201.

[0046] The air exchange system specifically includes fresh air ducts and exhaust ducts. A fresh air channel is formed within the fresh air duct, and an exhaust air channel is formed within the exhaust duct. The total heat exchanger is housed within a rectangular casing 7, which includes a first port, a second port, a third port, and a fourth port. The first port is directly connected to the exhaust inlet 301, and the second port is directly connected to the fresh air outlet 202. When a centrifugal fan 5 is installed inside the casing 1, the inlet 101 and outlet 102 are perpendicular to each other. The first and second ports are located on adjacent surfaces of the casing 7, facilitating ductwork installation and improving layout efficiency. The third port is directly connected to the exhaust outlet 302, and the fourth port is directly connected to the fresh air inlet 201.

[0047] This utility model also provides an air conditioner, including the aforementioned indoor unit.

[0048] Furthermore, the air conditioner is equipped with air quality sensors, such as carbon dioxide sensors, dust sensors, and oxygen sensors. When the indoor air quality is lower than the outdoor air quality (higher indoor carbon dioxide concentration, higher dust concentration, and lower oxygen concentration), the air conditioner can be turned on, simultaneously opening the exhaust and fresh air valves to supply fresh air into the room and exhaust stale air to the outside. When the indoor air quality is higher than the outdoor air quality, the fresh air and exhaust valves are closed. Moreover, the fresh air and exhaust valves can be controlled independently. Through this intelligent control, the efficiency of indoor and outdoor ventilation is improved, indoor air quality is enhanced, and ultimately, energy consumption for indoor and outdoor ventilation is reduced.

[0049] Air conditioners come in various forms, such as wall-mounted or ceiling-mounted units. They are relatively thin and typically use multiple centrifugal fans inside to circulate indoor air. During operation, as shown in the diagram... Figure 1 , Figure 3 and Figure 4 As shown, the motor drives the impeller to rotate. Under the action of centrifugal force, a low pressure is formed at the fan inlet, which draws indoor air in from the air conditioner return air inlet. After passing through the impeller and the air conditioner heat exchanger for heat exchange, the air is delivered to the room through the air outlet. The direction of the air supply is adjusted by the air guide plate at the air outlet.

[0050] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0051] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. An indoor unit for an air conditioner, comprising a housing (1), wherein the housing (1) is provided with an air inlet (101) and an air outlet (102), wherein when the indoor unit for the air conditioner is in operation, a low-pressure zone is formed outside the air inlet (101), characterized in that, The indoor unit of the air conditioner also includes a ventilation device, which includes a fresh air duct and an exhaust air duct. The fresh air duct includes a fresh air inlet (201) and a fresh air outlet (202), and the exhaust air duct includes an exhaust air inlet (301) and an exhaust air outlet (302). The fresh air inlet (201) is located outdoors, and the fresh air outlet (202) is located in the low-pressure area. The exhaust air outlet (302) is located outdoors, and some of the air discharged from the air outlet (102) can enter the exhaust air inlet (301).

2. The indoor unit of the air conditioner according to claim 1, characterized in that, The exhaust inlet (301) is provided with a flared structure (4), which includes a diverter plate (401). Part of the air discharged from the air outlet (102) is guided by the diverter plate (401) and enters the exhaust channel.

3. The indoor unit of the air conditioner according to claim 1, characterized in that, The casing (1) is equipped with a cross-flow fan blade, the air outlet (102) is elongated, and the exhaust inlet (301) is located at one end of the air outlet (102).

4. The indoor unit of the air conditioner according to claim 2, characterized in that, At least one centrifugal fan (5) is provided inside the casing (1), and the exhaust inlet (301) is opposite to the outlet of the centrifugal fan (5).

5. The indoor unit of the air conditioner according to claim 4, characterized in that, In the axial direction of the centrifugal fan (5), the outlet size of the centrifugal fan (5) is L, and the size of the flared structure (4) is L1, 0.1≤L1 / L<1.

6. The indoor unit of the air conditioner according to claim 5, characterized in that, The plane that passes through the outlet of the centrifugal fan (5) at one end in the axial direction and is perpendicular to the rotation axis of the centrifugal fan (5) is plane P. The maximum distance between the diverter plate (401) and plane P is L2, and 0.1≤L2 / L1≤0.

2.

7. The indoor unit of the air conditioner according to claim 1, characterized in that, The air exchange device includes a heat exchange section (6), and the fresh air duct and the exhaust air duct are thermally coupled through the heat exchange section (6).

8. The indoor unit of the air conditioner according to claim 7, characterized in that, The air exchange device includes a housing (7), the heat exchange part (6) is disposed inside the housing (7), and the housing (7) is fixed on the casing (1).

9. The indoor unit of an air conditioner according to any one of claims 1-8, characterized in that, A fresh air valve is installed in the fresh air duct, and an exhaust valve is installed in the exhaust air duct.

10. An air conditioner, characterized in that, Includes the indoor unit of the air conditioner as described in any one of claims 1-9.

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