Indoor unit and air conditioner

Abstract

The utility model discloses an indoor unit and an air conditioner, and the indoor unit comprises a housing which is provided with an air inlet and an air outlet; the base is arranged on the machine shell; the volute assembly is arranged on the base, an air duct is defined by the volute assembly, and the air duct communicates with the air inlet and the air outlet; the fan is arranged in the air duct and used for driving air in the machine shell to enter from the air inlet and flow towards the air outlet through the air duct. The support is arranged on the base and is opposite to the volute assembly in position; the motor is detachably arranged on the support and used for driving the fan to rotate; the base, the support and the volute assembly are of an integrally-formed structure. The base, the support and the volute assembly are of an integrally-formed structure, the machining procedure is simplified, and the production cost can be reduced. And meanwhile, the volute assembly does not need to be assembled with the base, so that the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, and in particular to an indoor unit and an air conditioner. Background Technology

[0002] With technological advancements and the needs of daily life and production, air conditioner structures have become increasingly diverse. In addition to traditional wall-mounted and floor-standing units, window and ceiling-mounted air conditioners are now widely used. Bathrooms are frequently used areas in our daily lives and are prone to odors. From a health perspective, prolonged exposure to such an environment can easily lead to respiratory illnesses.

[0003] In related technologies, ventilation is achieved by installing a ventilation device inside the air conditioner, exhausting indoor air to the outside. However, in existing technologies, the internal structure of the ventilation device is relatively complex, and the connection between the various components is time-consuming and labor-intensive, affecting production efficiency.

[0004] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Utility Model Content

[0005] In response to the problems pointed out in the background art, this utility model proposes an indoor unit and an air conditioner to solve the problems of complex internal structure of air conditioning ventilation devices in the prior art, time-consuming and labor-intensive connection between various components, which affects production efficiency.

[0006] To achieve the above-mentioned objectives, the present invention employs the following technical solution:

[0007] In some embodiments of this application, an indoor unit is proposed, comprising:

[0008] The casing has an air inlet and an air outlet.

[0009] A base, which is disposed on the housing;

[0010] A volute assembly is disposed on the base and defines an air outlet duct that connects the air inlet and the air outlet;

[0011] A fan, which is located in the air duct, is used to drive the air in the housing to enter from the air inlet and flow through the air duct toward the air outlet;

[0012] A support is provided on the base and is positioned opposite to the volute assembly;

[0013] An electric motor, which is detachably mounted on the support, is used to drive the fan to rotate;

[0014] The base, the support and the volute assembly are integrally formed.

[0015] The indoor unit has the following advantages or beneficial effects: the indoor air can be exchanged by setting the air inlet and the air outlet on the casing, setting the base, the volute assembly, the fan, the support and the motor in the casing, the volute assembly defining the air duct, the fan being arranged in the air duct, the motor being drivingly connected with the fan, and the fan flowing the air in the casing from the air inlet to the air outlet during rotation; the indoor air can be exchanged, and the indoor peculiar smell can be eliminated; the base, the support and the volute assembly are integrally formed, the processing procedure is simplified, and the production cost is reduced; meanwhile, the volute assembly does not need to be assembled with the base, and the production efficiency is improved.

[0016] In some embodiments of the present application, the volute assembly comprises a first volute and a second volute, the first volute and the second volute are detachably connected, and the first volute and the base are integrally formed.

[0017] The indoor unit has the following advantages or beneficial effects: the volute assembly comprises the first volute and the second volute, the first volute and the second volute are detachably connected, and the fan is easy to install; the first volute and the base are integrally formed, the processing procedure is simplified, the production efficiency is improved, and the cost is reduced.

[0018] In some embodiments of the present application, the volute assembly is formed with an air inlet end and an air outlet end, the air inlet end and the air outlet end are communicated through the air duct, the first volute is formed with a wind guide portion at the air outlet end, and the second volute is formed with a volute tongue at the air outlet end.

[0019] The wind guide groove and / or the sawtooth portion are configured to comb the airflow.

[0020] The indoor unit has the following advantages or beneficial effects: the air inlet end and the air outlet end are formed on the volute assembly, the wind guide portion is formed on the first volute at the air outlet end, and the volute tongue is formed on the second volute at the air outlet end, so that the circulation of part of the gas in the volute assembly is prevented.

[0021] In some embodiments of the present application, the air inlet end is formed with an air inlet ring in the air inlet direction, and the air outlet end faces the air outlet.

[0022] The indoor unit has the following advantages or beneficial effects: the air inlet ring is arranged on the air inlet end, the air inlet ring guides the airflow to the fan, the turbulent airflow entering the fan is eliminated, and the air inlet quality is improved.

[0023] In some embodiments of this application, on the surfaces where the first volute and the second volute contact, one of the first volute and the second volute is formed with a groove, and the other of the first volute and the second volute is formed with a protrusion, the groove cooperating with the protrusion.

[0024] The indoor unit in the above technical solution has the following advantages or beneficial effects: by setting grooves and protrusions on the contact surfaces of the first and second volutes, the contact sealing of the first and second volutes is improved, preventing air leakage.

[0025] In some embodiments of this application, the first volute and the second volute are connected by multiple snap-fit ​​connections.

[0026] The indoor unit in the above technical solution has the following advantages or beneficial effects: the first and second volutes are connected by multiple snap-fit ​​connections, which helps to improve installation efficiency.

[0027] In some embodiments of this application, the indoor unit further includes:

[0028] A fixing part, which is detachably covered at the end of the support, is configured to fix the motor to the support.

[0029] The indoor unit in the above technical solution has the following advantages or beneficial effects: by setting a fixing part, the fixing part is detachably covered at the end of the support, which makes it easy to fix the motor on the support.

[0030] In some embodiments of this application, the end of the support is recessed inward to form a recessed portion, and the recessed portion and the fixing portion together enclose a cavity for accommodating the motor.

[0031] The indoor unit in the above technical solution has the following advantages or beneficial effects: the recessed part and the fixed part together form a cavity to accommodate the motor, which makes it easy to fix the motor firmly on the support.

[0032] In some embodiments of this application, a first heat dissipation hole is formed on the support, and a second heat dissipation hole is formed on the recess, wherein the second heat dissipation hole and the first heat dissipation hole are connected.

[0033] The indoor unit in the above technical solution has the following advantages or beneficial effects: by setting the first heat dissipation hole, the second heat dissipation hole and the third heat dissipation hole, air flow can be enhanced, which facilitates better heat dissipation of the motor.

[0034] In some embodiments of this application, an air conditioner is also proposed, comprising:

[0035] An outdoor unit; and an indoor unit as described in any of the above embodiments, wherein the indoor unit is connected to the outdoor unit.

[0036] The indoor unit in the above technical solution has the following advantages or beneficial effects: by setting up the above indoor unit, the indoor air can be exchanged by the rotation of the fan, which is conducive to eliminating indoor odors; the base, support and volute assembly are integrally molded structures, which simplifies the processing process, helps to reduce production costs and improve economic efficiency. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 One of the structural schematic diagrams of an embodiment of the indoor unit provided by this utility model;

[0039] Figure 2 A second schematic diagram of the structure of an embodiment of the indoor unit provided by this utility model;

[0040] Figure 3 One of the schematic diagrams of the internal structure of the indoor unit provided by this utility model;

[0041] Figure 4 A second schematic diagram of the internal structure of the indoor unit provided by this utility model;

[0042] Figure 5 This is the third schematic diagram of the internal structure of the indoor unit provided by this utility model;

[0043] Figure 6 The fourth schematic diagram of the internal structure of the indoor unit provided by this utility model;

[0044] Figure 7 One of the exploded views of the internal structure of the indoor unit provided by this utility model;

[0045] Figure 8 Exploded view of part of the internal structure of the indoor unit provided by this utility model (Part 2);

[0046] Figure 9 A cross-sectional view of the volute assembly provided by this utility model;

[0047] Figure 10 One of the partial structural schematic diagrams of the volute assembly provided by this utility model;

[0048] Figure 11 A second partial structural schematic diagram of the volute assembly provided by this utility model;

[0049] Figure 12 The third schematic diagram of a portion of the volute assembly provided by this utility model.

[0050] Figure label:

[0051] 1. Housing; 11. Air inlet; 12. Air outlet;

[0052] 2. Base;

[0053] 3. Volute assembly; 31. Air inlet end; 311. Air inlet ring; 32. Air outlet end; 321. Air guide section; 3211. Air guide groove; 322. Volute tongue; 3221. Serrated section; 33. First volute; 331. Groove; 34. Second volute; 341. Protrusion; 35. Buckle; 351. Insertion section; 352. Slot section;

[0054] 4. Fan;

[0055] 5. Support; 51. Recess; 511. Second heat dissipation hole; 52. First heat dissipation hole;

[0056] 6. Electric motor;

[0057] 7. Fixing part; 71. Third heat dissipation hole;

[0058] 8. Main casing; 81. Main air inlet; 82. Main air outlet. Detailed Implementation

[0059] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0060] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., 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 application and simplifying the description, and 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. Therefore, they should not be construed as limitations on this application.

[0061] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0062] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0063] In this invention, unless otherwise explicitly 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.

[0064] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0065] In this application, the air conditioner performs a refrigeration cycle in the indoor unit by using a compressor, condenser, expansion valve, and evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation to cool or heat the indoor space.

[0066] Low-temperature, low-pressure refrigerant enters the compressor, which compresses it into a high-temperature, high-pressure refrigerant gas and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0067] The expansion valve expands the high-temperature, high-pressure liquid refrigerant that condenses in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the expanded refrigerant in the expansion valve and returns the low-temperature, low-pressure refrigerant gas to the compressor. The evaporator achieves its cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material being cooled. Throughout the cycle, the air conditioner regulates the temperature of the indoor space.

[0068] The outdoor unit of an air conditioner refers to the part of the refrigeration cycle that includes the compressor and the outdoor heat exchanger. The indoor unit of the indoor unit includes the indoor heat exchanger, and the expansion valve can be provided in either the indoor or outdoor unit.

[0069] The indoor and outdoor heat exchangers function as either condensers or evaporators. When the indoor heat exchanger is used as a condenser, the indoor unit functions as a heater in heating mode; when the indoor heat exchanger is used as an evaporator, the indoor unit functions as a cooler in cooling mode.

[0070] Bathrooms are relatively enclosed spaces with poor air quality, strong odors, and are dark and damp, making them prone to the growth of harmful organisms such as bacteria, mold, and mites.

[0071] By installing an indoor unit in the bathroom, the indoor unit can effectively regulate the temperature and humidity of the bathroom. Especially in the hot summer, it can quickly cool down the bathroom and ensure that the kitchen remains cool in hot weather, thereby improving the comfort of using the toilet. In the cold winter, it can quickly raise the temperature of the bathroom, thus avoiding the need to endure the biting cold when taking a shower.

[0072] In some embodiments of this application, combined with Figures 1 to 12 As shown, an indoor unit is proposed, which includes a main housing 8, a casing 1, a base 2, a volute assembly 3, a fan 4, a support 5, a motor 6, a heat exchanger, and a blower.

[0073] The housing 1 is provided with an air inlet 11 and an air outlet 12. The housing 1 defines the overall external outline, and the outer outline of the housing 1 is a cuboid or a square.

[0074] The casing 1 is located on one side of the main casing 8. The heat exchanger and the fan are located inside the main casing 8. The bottom of the main casing 8 is provided with a main air inlet 81 and a main air outlet 82, and both the main air inlet 81 and the main air outlet 82 face the indoor side.

[0075] SeeFigure 2 The arrows in the diagram indicate the airflow direction. The air inlet 11 on the casing 1 is connected to the main air inlet 81. When the bathroom is being ventilated, the air in the bathroom is drawn into the main casing 8 through the main air inlet 81 by the fan 4, enters the casing 1 through the air inlet 11, and is then discharged to the outside through the air outlet 12. When it is necessary to heat the air in the bathroom, the air in the bathroom is drawn into the main casing 8 through the main air inlet 81 by the fan, flows through the heat exchanger for heating, and the heated air is discharged into the bathroom through the main air outlet 82.

[0076] The base 2 is mounted on the housing 1 and is fixed to the top inner side of the housing 1 by screws or other fasteners.

[0077] The volute assembly 3 is mounted on the base 2. The volute assembly 3 defines the air outlet duct, which connects the air inlet 11 and the air outlet 12.

[0078] Fan 4 is located inside the air duct. Fan 4 drives the air inside the housing 1 to flow from the air inlet 11 through the air duct toward the air outlet 12. Fan 4 is a centrifugal structure. The volute assembly 3 guides the airflow to rotate and accelerate along a curved shape, so that the airflow speed gradually increases as it passes through the volute assembly 3.

[0079] The support 5 is mounted on the base 2 and is positioned opposite to the volute assembly 3.

[0080] The motor 6 is detachably mounted on the support 5. The output shaft of the motor 6 is connected to the fan 4 for driving the fan 4 to rotate.

[0081] Among them, the base 2, the support 5 and the volute assembly 3 are integrally formed structures.

[0082] Specifically, by setting an air inlet 11 and an air outlet 12 on the housing 1, and setting a base 2, a volute assembly 3, a fan 4, a support 5 and a motor 6 inside the housing 1, the volute assembly 3 defines the air outlet duct, the fan 4 is located in the air duct, and the motor 6 is connected to drive the fan 4. During the rotation of the fan 4, the air inside the housing 1 enters through the air inlet 11 and flows through the air duct toward the air outlet 12, which can realize the ventilation of indoor air and help eliminate indoor odors. The base 2, support 5 and volute assembly 3 are integrally molded structures, which simplifies the processing steps and helps reduce production costs. At the same time, the volute assembly 3 does not need to be assembled with the base 2, which helps improve production efficiency.

[0083] In some embodiments of this application, see Figure 3 and Figure 4The volute assembly 3 includes a first volute 33 and a second volute 34. The first volute 33 is located above the second volute 34. The first volute 33 and the second volute 34 are detachably connected, and the first volute 33 and the base 2 are integrally formed.

[0084] Specifically, the volute assembly 3 includes a first volute 33 and a second volute 34. The first volute 33 and the second volute 34 are detachably connected, which facilitates the installation of the fan 4 into the volute assembly 3. The first volute 33 and the base 2 are integrally molded, which simplifies the processing steps, helps to improve production efficiency and reduce costs.

[0085] In some embodiments of this application, see Figure 5 and Figure 6 The volute assembly 3 has an air inlet end 31 and an air outlet end 32, which are connected by an air duct. The first volute 33 has an air guide part 321 at the air outlet end 32, and the second volute 34 has a volute tongue 322 at the air outlet end 32.

[0086] The air guide portion 321 has an air guide groove 3211 and / or the volute tongue 322 has a serrated portion 3221, the air guide groove 3211 and the serrated portion 3221 being configured to comb the airflow.

[0087] Specifically, by forming an air inlet end 31 and an air outlet end 32 on the volute assembly 3, the first volute 33 forms an air guide part 321 at the upper end of the air outlet end 32, and the second volute 34 forms a volute tongue 322 at the lower end of the air outlet end 32, which can prevent some gas from circulating in the volute assembly 3 and ensure that the gas can flow smoothly to the exhaust port; the serrated part 3221 can reduce aerodynamic noise by delaying boundary layer separation and accelerating wake mixing.

[0088] In some embodiments of this application, the air inlet end 31 extends along the air inlet direction to form an air inlet ring 311, and the air outlet end 32 faces the air outlet 12.

[0089] Specifically, an air inlet ring 311 is formed by extending the air inlet end 31 along the air inlet direction. The air inlet ring 311 controls the airflow by adjusting the size and position of the air inlet 11, ensuring that the fan 4 operates within its normal operating range. At the same time, the air inlet ring 311 guides the airflow to the fan 4, which helps to eliminate turbulent airflow entering the fan 4, reduce noise and vibration, thereby improving airflow quality and increasing fan efficiency.

[0090] Specifically, the fan 4 has two symmetrically arranged air inlets 31, and correspondingly two air inlets 11 are also provided, so that the two air inlets 31 can take in air respectively.

[0091] In some embodiments of this application, see Figure 9On the contact surface of the first volute 33 and the second volute 34, one of the first volute 33 and the second volute 34 is formed with a groove 331, and the other of the first volute 33 and the second volute 34 is formed with a protrusion 341, and the groove 331 and the protrusion 341 cooperate.

[0092] Specifically, by providing a groove 331 and a protrusion 341 on the contact surfaces of the first volute 33 and the second volute 34, when the first volute 33 and the second volute 34 are connected, the protrusion 341 extends into the groove 331, which can make the first volute 33 and the second volute 34 tightly connected together, improving the contact sealing of the first volute 33 and the second volute 34 and preventing air leakage.

[0093] In some embodiments of this application, the first volute 33 and the second volute 34 are connected by a plurality of snap fasteners 35.

[0094] Specifically, the first volute 33 and the second volute 34 are connected by multiple snap-fits 35. The snap-fits 35 are easy to plug in and out, which helps to improve installation efficiency.

[0095] Specifically, the buckle 35 includes a slot portion 352 and a plug portion 351. The slot portion 352 is disposed on one of the first volute 33 and the second volute 34, and the plug portion 351 is disposed on the other of the first volute 33 and the second volute 34. The first volute 33 and the second volute 34 are connected to the slot portion 352 through the plug portion 351. Quick assembly and disassembly can be achieved without the need for auxiliary tools or additional connecting parts, which helps to improve assembly and disassembly efficiency.

[0096] In some embodiments of this application, see Figure 7 and Figure 8 The indoor unit also includes a fixing part 7, which is detachably covered at the end of the support 5 and is configured to fix the motor 6 to the support 5.

[0097] Specifically, by providing a fixing part 7, which is detachably covered at the end of the support 5, it is convenient to fix the motor 6 on the support 5.

[0098] In some embodiments of this application, the end of the support 5 is recessed inward to form a recessed portion 51, and the recessed portion 51 and the fixing portion 7 together form a cavity for accommodating the motor 6.

[0099] Specifically, the recessed portion 51 and the fixing portion 7 together form a cavity to accommodate the motor 6. The recessed portion 51 and the fixing portion 7 restrict the motor 6 on the support 5, which helps to improve the stability of the motor 6 installation.

[0100] In some embodiments of this application, see Figure 10 , Figure 11 andFigure 12 The support 5 has one or more first heat dissipation holes 52, and the recess 51 has one or more second heat dissipation holes 511, which are connected to the first heat dissipation holes 52.

[0101] In some embodiments of this application, one or more third heat dissipation holes 71 are formed on the fixing part 7, so that the first heat dissipation hole 52, the second heat dissipation hole 511 and the third heat dissipation hole 71 can enhance airflow and facilitate better heat dissipation of the motor 6.

[0102] In some embodiments of this application, an air conditioner is also proposed, including an outdoor unit and an indoor unit as described in any of the above embodiments, wherein the indoor unit is connected to the outdoor unit.

[0103] Specifically, by setting up the indoor unit, the indoor air can be exchanged through the rotation of the fan 4, which helps to eliminate indoor odors; the base 2, support 5 and volute assembly 3 are integrally molded structures, which simplifies the processing procedures, helps to reduce production costs and improve economic efficiency.

[0104] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0105] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An indoor unit, characterized in that, include: The casing has an air inlet and an air outlet. A base, which is disposed on the housing; A volute assembly is disposed on the base and defines an air outlet duct that connects the air inlet and the air outlet; A fan, which is located in the air duct, is used to drive the air in the housing to enter from the air inlet and flow through the air duct toward the air outlet; A support is provided on the base and is positioned opposite to the volute assembly; An electric motor, which is detachably mounted on the support, is used to drive the fan to rotate; The base, the support, and the volute assembly are integrally formed structures.

2. The indoor unit according to claim 1, characterized in that, The volute assembly includes a first volute and a second volute, which are detachably connected, and the first volute and the base are integrally formed.

3. The indoor unit according to claim 2, characterized in that, The volute assembly has an air inlet and an air outlet, which are connected by the air duct. The first volute has an air guide at the air outlet, and the second volute has a volute tongue at the air outlet. The air guide portion has an air guide groove and / or the volute tongue has a serrated portion, and the air guide groove and the serrated portion are configured to guide the airflow.

4. The indoor unit according to claim 3, characterized in that, The air inlet extends along the air inlet direction to form an air inlet ring, and the air outlet faces the air outlet.

5. The indoor unit according to claim 2, characterized in that, On the contact surfaces of the first and second volutes, one of the first and second volutes has a groove, and the other of the first and second volutes has a protrusion, with the groove engaging with the protrusion.

6. The indoor unit according to claim 2, characterized in that, The first volute and the second volute are connected by multiple snap-fit ​​connections.

7. The indoor unit according to claim 1, characterized in that, The indoor unit also includes: A fixing part, which is detachably covered at the end of the support, is configured to fix the motor to the support.

8. The indoor unit according to claim 7, characterized in that, The end of the support is recessed inward to form a recessed portion, and the recessed portion and the fixing portion together form a cavity to accommodate the motor.

9. The indoor unit according to claim 8, characterized in that, A first heat dissipation hole is formed on the support, and a second heat dissipation hole is formed on the recessed portion. The second heat dissipation hole and the first heat dissipation hole are connected.

10. An air conditioner, characterized in that, include: Outdoor unit; as well as The indoor unit as described in any one of claims 1 to 9 is connected to the outdoor unit.

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