Air conditioner

Abstract

The utility model provides an air conditioner which comprises an indoor unit shell, an outdoor unit shell, a heat exchanger and a heat exchanger. The fan blades are arranged in the indoor unit shell; the electric heater is arranged in the indoor unit shell and located between the fan blades and the air inlet part, the electric heater comprises an electric heating element and a temperature limiter which are connected with each other, and the temperature limiter is located on the side, close to the air inlet part, of the electric heating element. According to the technical scheme provided by the embodiment of the utility model, the technical problem that the service life of the electric heater is easily influenced due to frequent starting and stopping of the temperature limiter of the air conditioner in the prior art can be solved.

Description

Technical Field

[0001] This utility model relates to the field of air conditioner technology, and more specifically, to an air conditioner. Background Technology

[0002] Currently, air conditioners in existing technology generally use electric heaters to assist in regulating indoor temperature, achieving rapid and powerful heating, enabling normal operation of the air conditioner in extremely cold regions. The electric heater consists of a heating element and a thermostat. The thermostat can slowly reset and switch on and off, controlling the electric heater to disconnect from the power supply when the temperature is high, thereby protecting the electric heater.

[0003] However, in existing electric heaters, the hot air around them is relatively concentrated, which often causes the temperature limiter to detect a higher temperature. This can easily lead to the temperature limiter detecting the upper limit value, causing it to frequently start and stop, thus affecting the service life of the electric heater. Utility Model Content

[0004] The main objective of this invention is to provide an air conditioner that solves the technical problem that frequent on / off cycles of the temperature limiter in existing air conditioners can affect the service life of the electric heater.

[0005] To achieve the above objectives, this utility model provides an air conditioner, comprising:

[0006] An indoor unit housing, wherein an air inlet is provided on the indoor unit housing;

[0007] The fan blades are installed inside the indoor unit housing;

[0008] An electric heater is disposed inside the indoor unit housing and located between the fan blades and the air inlet. The electric heater includes an electric heating element and a temperature limiter connected to each other. The temperature limiter is located on the side of the electric heating element closer to the air inlet.

[0009] Furthermore, the indoor unit housing includes a first air inlet side plate, a main air inlet plate, and a second air inlet side plate connected in sequence. The first air inlet side plate is connected to the main air inlet plate at a first preset angle, and the second air inlet side plate is connected to the main air inlet plate at a second preset angle. The air inlet section includes a first vent on the first air inlet side plate, a main air inlet on the main air inlet plate, and a second vent on the second air inlet side plate. The temperature limiter is located on the side of the electric heating element closer to the main air inlet.

[0010] Furthermore, the temperature limiter is disposed at the upper end of the electric heating element.

[0011] Furthermore, the electric heater also includes:

[0012] A mounting bracket is disposed on the electric heating element and located at the upper end of the electric heating element; the temperature limiter is mounted on the mounting bracket; and / or,

[0013] A thermal fuse is disposed on the electric heating element.

[0014] Furthermore, the air conditioner also includes:

[0015] An evaporator is disposed inside the indoor unit housing, and an electric heater is disposed between the evaporator and the fan blades.

[0016] Furthermore, the electric heater is spaced apart from the evaporator, and the electric heater is spaced apart from the fan blades, with the distance between the electric heater and the evaporator being smaller than the distance between the electric heater and the fan blades.

[0017] Furthermore, the air conditioner also includes an evaporator, which has a main evaporation section corresponding to the main air inlet plate; the electric heating element is a square strip structure, which has a first side and a second side connected adjacent to each other, the length of the first side is a, the width of the second side is b, and a > b;

[0018] The first side is disposed opposite to the main air inlet plate, the temperature limiter is installed on the first side, the distance between the temperature limiter and the main evaporator is s, and the distance between the outer diameter edge of the fan blade and the main evaporator is h;

[0019] Among them, 0.78hb≥s≥0.36h.

[0020] Furthermore, the air conditioner also includes an evaporator, which has a main evaporation section corresponding to the main air inlet plate; the electric heating element is a square strip structure, which has a first side and a second side connected adjacent to each other, the length of the first side is a, the width of the second side is b, and a > b;

[0021] The second side is disposed opposite to the main air inlet plate, the temperature limiter is installed on the second side, the distance between the temperature limiter and the main evaporator is s, and the distance between the outer diameter edge of the fan blade and the main evaporator is h;

[0022] Among them, 0.6hb≥s≥0.48h.

[0023] Furthermore, the indoor unit housing has at least two air duct cavities, both of which are connected to the air inlet. There are at least two fan blades and at least two electric heaters. At least two fan blades are arranged in a one-to-one correspondence with at least two air duct cavities, and each fan blade is installed in its corresponding air duct cavity. At least two electric heaters are arranged in a one-to-one correspondence with at least two fan blades, and each fan blade is disposed between the air inlet and its corresponding fan blade.

[0024] Furthermore, there are two air duct cavities, which are symmetrically distributed within the indoor unit housing. The indoor unit housing has two symmetrically distributed air outlets, which are located on both sides of the indoor unit housing. The air outlets of the two air duct cavities are arranged in a one-to-one correspondence with the two air outlets, and the air outlet of each air duct cavity is oriented towards the corresponding air outlet.

[0025] By applying the technical solution of this utility model, the electric heater is placed inside the indoor unit casing, between the fan blades and the air inlet, and the thermostat is positioned on the side of the electric heating element closer to the air inlet. This ensures smooth airflow at the location of the thermostat, preventing inaccurate temperature detection by the thermostat due to poor airflow and frequent on / off cycles of the electric heating element. This effectively extends the lifespan of the electric heater and facilitates improved indoor temperature rise, enhancing the reliability and safety of the electric heater. Therefore, the air conditioner provided in this embodiment solves the technical problem in existing air conditioners where frequent on / off cycles of the thermostat negatively impact the lifespan of the electric heater. Attached Figure Description

[0026] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0027] Figure 1 A cross-sectional view of an air conditioner provided according to an embodiment of the present invention is shown;

[0028] Figure 2 A cross-sectional view of the first side of the electric heating element of an air conditioner provided according to an embodiment of the present invention, facing the air inlet, is shown.

[0029] Figure 3 A cross-sectional view of the second side of an air conditioner with an electric heating element provided according to an embodiment of the present invention, facing the air inlet, is shown.

[0030] Figure 4 A schematic diagram showing the connection of two electric heating elements according to an embodiment of the present invention is shown;

[0031] Figure 5 A cross-sectional schematic diagram of an electric heater provided according to an embodiment of the present invention is shown;

[0032] Figure 6 A front view of an electric heater provided according to an embodiment of the present invention is shown;

[0033] Figure 7 A side view of an electric heater provided according to an embodiment of the present invention is shown;

[0034] Figure 8 A top view of an electric heater provided according to an embodiment of the present invention is shown.

[0035] The above figures include the following reference numerals:

[0036] 10. Indoor unit casing;

[0037] 11. First air intake side panel;

[0038] 12. Main air intake panel;

[0039] 13. Second air intake side panel;

[0040] 14. Air duct cavity;

[0041] 15. Ventilation section;

[0042] 20. Wind blades;

[0043] 30. Electric heater;

[0044] 31. Electric heating element; 311. First side surface; 312. Second side surface;

[0045] 32. Temperature limiter;

[0046] 33. Install the bracket;

[0047] 34. Thermal fuse;

[0048] 40. Evaporator;

[0049] 41. First side evaporation section;

[0050] 42. Main evaporator section;

[0051] 43. Second side evaporation section. Detailed Implementation

[0052] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0053] like Figures 1 to 8As shown, Embodiment 1 of this utility model provides an air conditioner, which includes: an indoor unit housing 10, a fan blade 20, and an electric heater 30. The indoor unit housing 10 is provided with an air inlet. The fan blade 20 is disposed inside the indoor unit housing 10. The electric heater 30 is disposed inside the indoor unit housing 10 and located between the fan blade 20 and the air inlet. The electric heater 30 includes an electric heating element 31 and a temperature limiter 32 connected to each other. The temperature limiter 32 is located on the side of the electric heating element 31 near the air inlet.

[0054] The air conditioner provided in this embodiment, by placing the electric heater 30 inside the indoor unit casing 10 and between the fan blades 20 and the air inlet, and positioning the thermostat 32 on the side of the electric heating element 31 closer to the air inlet, ensures smooth airflow at the location of the thermostat 32. This avoids inaccurate temperature detection by the thermostat 32 due to poor airflow at its location, which could lead to frequent on / off cycles of the electric heating element 31. This effectively extends the service life of the electric heater 30 and facilitates improved indoor temperature rise, thus enhancing the reliability and safety of the electric heater 30. Therefore, the air conditioner provided in this embodiment solves the technical problem in the prior art where frequent on / off cycles of the thermostat 32 can affect the service life of the electric heater 30.

[0055] Specifically, Figures 1 to 3 The arrows in the text all represent the direction of airflow.

[0056] Specifically, in this embodiment, the temperature limiter 32 is positioned on the side of the electric heating element 31 near the air inlet. This better ensures airflow around the temperature limiter 32, preventing the temperature from being too high due to hot air concentrating around it. This avoids the temperature limiter 32 frequently starting and stopping, as it and the electric heating element 31 would easily reach their upper limit value, causing frequent on / off cycles. This effectively improves indoor comfort for users. Specifically, the temperature limiter 32's configuration in this embodiment reduces its detected temperature by 22%.

[0057] By employing the temperature limiter 32 configuration in this embodiment, the temperature limiter 32 is not positioned on the leeward side of the electric heater 30. This avoids the influence of stagnant airflow in the triangular area on the leeward side, preventing the temperature limiter 32 from being affected by the accumulation of airflow on the leeward side when the electric heater 30 is turned on, thus avoiding the situation where the temperature limiter 32 frequently starts and stops due to reaching the upper limit value. Comparing the temperature limiter 32 being located on the windward side and the leeward side of the electric heater 30, when the electric heater 30 is turned on and the temperature of the temperature limiter 32 is tested, the temperature of the temperature limiter 32 reaches 90°C when the electric heater 30 is on the leeward side, while the temperature of the temperature limiter 32 is 70°C when the electric heater 30 is on the windward side. The detected temperature can be reduced by 22%, making it less likely to trigger frequent starting and stopping of the temperature limiter 32.

[0058] Specifically, an airflow pressure gradient will be formed on the leeward side: the airflow enters the air duct through the evaporator, and there is a large airflow velocity along both ends of the electric heater, while the airflow in the middle area is slow because it is on the leeward side. At this time, there is a certain air pressure difference between the airflow in the two ends and the middle area, and there is an airflow backflow phenomenon in the middle area. The poor airflow will easily lead to the accumulation of hot air and frequent operation of the temperature limiter.

[0059] In this embodiment, the indoor unit housing 10 includes a first air inlet side plate 11, a main air inlet plate 12, and a second air inlet side plate 13 connected in sequence. The first air inlet side plate 11 is connected to the main air inlet plate 12 at a first preset angle, and the second air inlet side plate 13 is connected to the main air inlet plate 12 at a second preset angle. The air inlet section includes a first vent on the first air inlet side plate 11, a main air inlet on the main air inlet plate 12, and a second vent on the second air inlet side plate 13. The thermostat 32 is located on the side of the electric heating element 31 near the main air inlet. This structural arrangement helps to better ensure that the thermostat 32 is in a position with smooth airflow, thus better avoiding frequent on / off cycles caused by poor airflow at its location.

[0060] Specifically, the temperature limiter 32 is located at the upper end of the electric heating element 31. This structural arrangement takes into account the issue of hot air rising, thereby enabling the temperature limiter 32 to effectively detect the highest temperature and thus improving the detection accuracy of the temperature limiter 32.

[0061] Specifically, the electric heating element 31 can be a PTC electric heating element, that is, a heating element using PTC material (a semiconductor material or component with a large positive temperature coefficient).

[0062] Specifically, the electric heater 30 also includes a mounting bracket 33, which is disposed on the electric heating element 31 and located at the upper end of the electric heating element 31. The temperature limiter 32 is mounted on the mounting bracket 33. This facilitates the improvement of the installation stability of the temperature limiter 32.

[0063] Specifically, the electric heater 30 also includes a thermal fuse 34, which is disposed on the electric heating element 31. With this arrangement, the temperature limiter 32 can slowly reset, and the thermal fuse 34 can serve as a last resort for the electric heater 30, controlling the electric heater 30 to disconnect from the power supply when the temperature is high, thereby better protecting the electric heater 30.

[0064] In this embodiment, the air conditioner also includes an evaporator 40, which is disposed inside the indoor unit casing 10, and an electric heater 30 is disposed between the evaporator 40 and the fan blades 20. This structural arrangement facilitates optimization of the internal layout of the indoor unit, ensuring effective cooling and heating airflow in both cooling and heating modes.

[0065] Specifically, the electric heater 30 is spaced apart from the evaporator 40, and the electric heater 30 is spaced apart from the fan blade 20. The distance between the electric heater 30 and the evaporator 40 is smaller than the distance between the electric heater 30 and the fan blade 20. This structural arrangement facilitates the better dissipation of a large amount of hot air, preventing a large amount of hot air from accumulating inside the indoor unit casing 10, thereby effectively increasing the indoor air temperature and improving user comfort.

[0066] In this embodiment, the air conditioner further includes an evaporator 40, which has a main evaporation section 42 corresponding to the main air inlet plate 12. The electric heating element 31 has a square strip structure and has a first side 311 and a second side 312 connected adjacent to each other. The length of the first side 311 is a, and the width of the second side 312 is b, where a > b. The first side 311 is disposed opposite to the main air inlet plate 12, and a thermostat 32 is installed on the first side 311. The distance between the thermostat 32 and the main evaporation section 42 is s, and the distance between the outer diameter edge of the fan blade 20 and the main evaporation section 42 is h. Wherein, 0.78hb ≥ s ≥ 0.36h. With this structural arrangement, if the electric heater 30 is close to the evaporator 40, the small air intake area results in a high airflow velocity at both ends of the evaporator 40 when the airflow enters the duct, while the airflow in the middle area is relatively slow. This creates a certain air pressure difference between the different areas, which not only affects the fan performance but also prevents airflow around the electric heater 30 from circulating. Hot air concentrates near the electric heater 30, causing the temperature limiter 32 to detect a higher temperature, easily reaching its upper limit and causing the temperature limiter 32 to frequently start and stop. If the electric heater 30 is far from the evaporator 40, it is closer to the fan blade 20 in the limited space, resulting in a rapid airflow into the fan blade 20. This creates an air pressure difference at the inlet of the fan blade 20, and the airflow velocity varies at different points on the outer circumference of the fan blade 20. This causes the vortex inside the fan blade 20 to increase, resulting in airflow fluctuations and a corresponding increase in noise. By setting the distance of the temperature limiter 32 within the above range, it is possible to effectively prevent hot air from concentrating around the temperature limiter 32 and to effectively reduce noise fluctuations.

[0067] In this embodiment, the air conditioner further includes an evaporator 40, which has a main evaporation section 42 corresponding to the main air inlet plate 12. The electric heating element 31 has a square strip structure and has a first side 311 and a second side 312 connected adjacent to each other. The length of the first side 311 is a, and the width of the second side 312 is b, where a > b. The second side 312 is disposed opposite to the main air inlet plate 12, and a thermostat 32 is installed on the second side 312. The distance between the thermostat 32 and the main evaporation section 42 is s, and the distance between the outer diameter edge of the fan blade 20 and the main evaporation section 42 is h. Wherein, 0.6hb ≥ s ≥ 0.48h. With this structural arrangement, if the electric heater 30 is close to the evaporator 40, the small air intake area results in a high airflow velocity at both ends of the evaporator 40 when the airflow enters the duct, while the airflow in the middle area is relatively slow. This creates a certain air pressure difference between the different areas, which not only affects the fan performance but also prevents airflow around the electric heater 30 from circulating. Hot air concentrates near the electric heater 30, causing the temperature limiter 32 to detect a higher temperature, easily reaching its upper limit and causing the temperature limiter 32 to frequently start and stop. If the electric heater 30 is far from the evaporator 40, it is closer to the fan blade 20 in the limited space, resulting in a rapid airflow into the fan blade 20. This creates an air pressure difference at the inlet of the fan blade 20, and the airflow velocity varies at different points on the outer circumference of the fan blade 20. This causes the vortex inside the fan blade 20 to increase, resulting in airflow fluctuations and a corresponding increase in noise. By setting the distance of the temperature limiter 32 within the aforementioned range, it is possible to effectively prevent hot air from concentrating around the periphery of the temperature limiter 32 and to effectively reduce noise fluctuations. Specifically, since the width b of the electric heater 30 is less than the length a of the electric heater 30, the windward surface is small, making it easy to form an airflow pressure difference, and therefore the setting position of the corresponding limiter is different.

[0068] Specifically, the shape of the evaporator 40 is adapted to the shape of the air inlet plate, and the evaporator 40 includes a first side evaporation section 41, a main evaporation section 42 and a second side evaporation section 43 connected in sequence.

[0069] Specifically, the indoor unit housing 10 has at least two air duct cavities 14, both of which are connected to the air inlet. There are at least two fan blades 20 and at least two electric heaters 30. Each fan blade 20 is installed within its corresponding air duct cavity 14, and each electric heater 30 is also installed within its corresponding air duct cavity 14. Similarly, each electric heater 30 is positioned between its corresponding fan blade and the air inlet. This structural arrangement facilitates airflow from the at least two air duct cavities 14, allowing for airflow from different sides of the room and thus improving indoor air comfort.

[0070] In this embodiment, there are two air duct cavities 14, which are symmetrically distributed within the indoor unit housing 10. The indoor unit housing 10 has two symmetrically distributed air outlets 15, located on opposite sides of the housing. The air outlets of the two air duct cavities 14 correspond one-to-one with the air outlets 15, with each air outlet of the air duct 14 facing the corresponding air outlet 15. This structural arrangement better meets the comfort requirements of indoor users.

[0071] Specifically, the two air duct chambers 14 are located on the left and right sides of the indoor unit casing 10, respectively, to achieve air supply to the left and right sides. The two air outlets 15 can be controlled independently. Each air duct chamber is equipped with a fan blade, and the electric heater 30 in each air duct chamber is located between the corresponding fan blade 20 and the evaporator.

[0072] Specifically, the air conditioner in this embodiment can be a cabinet air conditioner.

[0073] As can be seen from the above description, the above embodiments of this utility model achieve the following technical effects: they can solve the technical problem that frequent on / off cycles of the temperature limiter in the prior art can affect the service life of the electric heater, reduce the number of frequent on / off cycles of the temperature limiter, and extend the service life of the electric heater; reduce the frequent on / off cycles of the electric heater, and improve the indoor temperature rise effect; and improve the reliability and safety performance of the electric heater.

[0074] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0075] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0076] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application 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 application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0077] 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.

[0078] 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 application.

[0079] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An air conditioner, characterized in that, include: Indoor unit housing (10), wherein an air inlet is provided on the indoor unit housing (10); Fan blades (20) are disposed inside the indoor unit housing (10); An electric heater (30) is disposed inside the indoor unit housing (10) and located between the fan blade (20) and the air inlet. The electric heater (30) includes an electric heating element (31) and a thermostat (32) connected to each other. The thermostat (32) is located on the side of the electric heating element (31) closer to the air inlet.

2. The air conditioner according to claim 1, characterized in that, The indoor unit housing (10) includes a first air inlet side plate (11), a main air inlet plate (12), and a second air inlet side plate (13) connected in sequence. The first air inlet side plate (11) is connected to the main air inlet plate (12) at a first preset angle, and the second air inlet side plate (13) is connected to the main air inlet plate (12) at a second preset angle. The air inlet section includes a first vent on the first air inlet side plate (11), a main air inlet on the main air inlet plate (12), and a second vent on the second air inlet side plate (13). The temperature limiter (32) is located on the side of the electric heating element (31) near the main air inlet.

3. The air conditioner according to claim 1, characterized in that, The temperature limiter (32) is located at the upper end of the electric heating element (31).

4. The air conditioner according to claim 1, characterized in that, The electric heater (30) also includes: A mounting bracket (33) is disposed on the electric heating element (31) and located at the upper end of the electric heating element (31), and the temperature limiter (32) is mounted on the mounting bracket (33); and / or, A thermal fuse (34) is disposed on the electric heating element (31).

5. The air conditioner according to claim 1, characterized in that, The air conditioner also includes: An evaporator (40) is disposed inside the indoor unit housing (10), and an electric heater (30) is disposed between the evaporator (40) and the fan blade (20).

6. The air conditioner according to claim 5, characterized in that, The electric heater (30) is spaced apart from the evaporator (40), and the electric heater (30) is spaced apart from the fan blade (20). The distance between the electric heater (30) and the evaporator (40) is smaller than the distance between the electric heater (30) and the fan blade (20).

7. The air conditioner according to claim 2, characterized in that, The air conditioner also includes an evaporator (40), which has a main evaporation section (42) corresponding to the main air inlet plate (12); the electric heating element (31) is a square strip structure, which has a first side (311) and a second side (312) connected adjacent to each other, the length of the first side (311) is a, and the width of the second side (312) is b, where a > b; The first side (311) is disposed opposite to the main air inlet plate (12), the temperature limiter (32) is installed on the first side (311), the distance between the temperature limiter (32) and the main evaporator (42) is s, and the distance between the outer diameter edge of the fan blade (20) and the main evaporator (42) is h; Among them, 0.78hb≥s≥0.36h.

8. The air conditioner according to claim 2, characterized in that, The air conditioner also includes an evaporator (40), which has a main evaporation section (42) corresponding to the main air inlet plate (12); the electric heating element (31) is a square strip structure, which has a first side (311) and a second side (312) connected adjacent to each other, the length of the first side (311) is a, and the width of the second side (312) is b, where a > b; The second side (312) is disposed opposite to the main air inlet plate (12), the temperature limiter (32) is installed on the second side (312), the distance between the temperature limiter (32) and the main evaporator (42) is s, and the distance between the outer diameter edge of the fan blade (20) and the main evaporator (42) is h; Among them, 0.6hb≥s≥0.48h.

9. The air conditioner according to claim 1, characterized in that, The indoor unit housing (10) has at least two air duct cavities (14), both of which are connected to the air inlet. There are at least two fan blades (20) and at least two electric heaters (30). At least two fan blades (20) are arranged in a one-to-one correspondence with at least two air duct cavities (14), and each fan blade (20) is installed in the corresponding air duct cavity (14). At least two electric heaters (30) are arranged in a one-to-one correspondence with at least two fan blades (20), and each fan blade (20) is disposed between the air inlet and the corresponding fan blade (20).

10. The air conditioner according to claim 9, characterized in that, There are two air duct cavities (14), which are symmetrically distributed inside the indoor unit housing (10). The indoor unit housing (10) has two symmetrically distributed air outlets (15), which are located on both sides of the indoor unit housing (10). The air outlets of the two air duct cavities (14) are arranged in a one-to-one correspondence with the two air outlets (15), and the air outlet of each air duct cavity (14) is arranged facing the corresponding air outlet (15).

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