CN214536667U

CN214536667U - Fresh air system and air conditioner indoor unit with same

Info

Publication number: CN214536667U
Application number: CN202120375617.7U
Authority: CN
Inventors: 杜亚峰; 潘龙腾; 陈红光; 郭自超
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-02-18
Filing date: 2021-02-18
Publication date: 2021-10-29
Anticipated expiration: 2031-02-18

Abstract

The utility model provides a new trend system and have its air conditioner indoor unit. The new trend system includes: the volute is provided with a first fan installation cavity; the mounting box is provided with an induced draft buffer cavity and is connected with the volute so that the induced draft buffer cavity is communicated with the first fan mounting cavity, and an induced draft air inlet communicated with the induced draft buffer cavity is formed in the mounting box; the filter assembly is arranged in the induced draft buffer cavity and is used for filtering gas flowing from the induced draft buffer cavity to the first fan installation cavity; wherein, offer the first opening with induced air cushion chamber intercommunication on the mounting box to make filtering component insert induced air cushion chamber or take out from induced air cushion chamber through first opening, solved the complicated problem of filtering component dismouting among the new trend system among the prior art.

Description

Fresh air system and air conditioner indoor unit with same

Technical Field

The utility model relates to a refrigeration technology field particularly, relates to a new trend system and have its air conditioner indoor unit.

Background

At present, in order to ensure the use effect of an air conditioner, the indoor environment is required to be a closed environment, but the air mobility in the indoor environment closed for a long time is poor, so that carbon dioxide, bacteria and the like in a room are increased continuously, and the proportion of pollutants in the air such as sulfide, nitrogen oxide, fine particles and the like is increased continuously, so that the air quality is poor. Therefore, the indoor unit of the air conditioner is generally added with a fresh air system to realize the function of introducing fresh air, and a filter screen is arranged in the fresh air system to filter fresh air entering the room.

However, the filter screen needs to be replaced by a new filter screen after being used for a period of time, at present, the mode of replacing the filter screen by a fresh air system in an air conditioner indoor unit needs to disassemble the whole fresh air system to take out the filter screen, and the replacement process of the filter screen is complicated and difficult to operate due to the arrangement.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides a new trend system and have its air conditioner to solve the complicated problem of filtering component dismouting among the new trend system among the prior art.

In order to achieve the above object, according to the utility model discloses an aspect provides a new trend system, and the new trend system includes: the volute is provided with a first fan installation cavity; the mounting box is provided with an induced draft buffer cavity and is connected with the volute so that the induced draft buffer cavity is communicated with the first fan mounting cavity, and an induced draft air inlet communicated with the induced draft buffer cavity is formed in the mounting box; the filter assembly is arranged in the induced draft buffer cavity and is used for filtering gas flowing from the induced draft buffer cavity to the first fan installation cavity; wherein, offer the first opening with induced air cushion chamber intercommunication on the mounting box to make filter assembly insert induced air cushion chamber or take out from induced air cushion chamber through first opening.

Further, new trend system includes: the first side plate is arranged in the mounting box, and an accommodating cavity for accommodating the filtering component is formed by the first side plate and the inner surface of the mounting box; when the filter assembly is in the installation state, the side edge of the filter assembly extends into the accommodating cavity and is abutted against the first side plate.

Furthermore, the filter assembly comprises a filter screen fixing frame and a shockproof structure arranged around the outer side of the filter screen fixing frame; when the filtering component is in an installation state, the side edge of the shockproof structure is abutted against the first side plate.

Further, the shockproof structure is made of foam plastics or ethylene-vinyl acetate copolymer.

Further, new trend system includes: the first cover plate is detachably covered at the first opening, and the first cover plate is detachably connected with the mounting box.

Further, the first opening is formed in the first circumferential side plate of the mounting box; when the first cover plate is in the mounting state, the side face, far away from the filter assembly, of the first cover plate is flush with the outer surface of the first circumferential side plate.

Further, new trend system includes: the first fan is arranged in the first fan installation cavity; the first opening is a strip-shaped opening, and the opening plane where the first opening is located is parallel to the axis of the first fan; the projection of the axis of the first fan on the opening plane is perpendicular to the extending direction of the first opening.

Further, an angle between an insertion direction of the filter assembly and a filtering direction of the filter assembly is greater than or equal to 45 ° and less than or equal to 135 °.

Furthermore, the volute is also provided with a second fan installation cavity, and the installation box is also provided with an exhaust buffer cavity; the volute comprises a volute main body and a volute cover plate covered on the volute main body; the volute cover plate is provided with a first cover plate opening and a second cover plate opening, the induced air buffer cavity is communicated with the first fan installation cavity through the first cover plate opening, and the exhaust air buffer cavity is communicated with the second fan installation cavity through the second cover plate opening.

According to the utility model discloses an on the other hand provides an air conditioner, including casing and the new trend system of setting in the casing, the new trend system is foretell new trend system.

Use the technical scheme of the utility model, new trend system includes spiral case, mounting box and filtering component. The filter assembly is arranged in the induced draft buffer cavity of the mounting box, and the filter assembly is used for filtering gas flowing into the first fan mounting cavity from the induced draft buffer cavity and is provided with a first opening communicated with the induced draft buffer cavity on the mounting box, so that the filter assembly is inserted into the induced draft buffer cavity or is drawn out from the induced draft buffer cavity through the first opening. The utility model is provided with the first opening on the mounting box, when the filter component needs to be disassembled, the filter component only needs to be moved out of the mounting box through the first opening; when the filter component needs to be installed in the fresh air system, the filter component only needs to be moved into the installation box through the first opening. The disassembly and assembly steps of the filter assembly in the fresh air system are simplified, and the problem that the filter assembly in the fresh air system in the prior art is complex to disassemble and assemble is solved.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows an exploded view of one embodiment of a fresh air system according to the present invention;

fig. 2 shows a schematic structural diagram of an embodiment of a fresh air system according to the present invention;

FIG. 3 shows a schematic structural view of one embodiment of a filter assembly of a fresh air system according to the present disclosure;

figure 4 shows a schematic structural diagram of an embodiment of a volute of a fresh air system according to the present invention;

fig. 5 shows a schematic structural diagram of an embodiment of a fresh air system according to the present invention; and

fig. 6 shows a schematic structural diagram of an embodiment of an indoor unit of an air conditioner according to the present invention.

Wherein the figures include the following reference numerals:

10. a fresh air system;

100. a volute; 111. a first fan mounting cavity; 112. a second fan mounting cavity; 120. a volute body;

200. mounting a box; 211. an induced draft buffer chamber; 212. an air exhaust buffer cavity; 220. an induced air inlet; 230. a first opening; 240. a first side plate; 250. an air outlet; 260. an air exhaust inlet;

300. a filter assembly; 310. a filter screen; 320. a filter screen fixing frame;

400. a volute cover plate; 410. a first cover plate opening; 420. a second cover plate opening;

511. a first fan blade; 512. a first fan; 521. a second fan blade; 522. a second fan; 513. an induced air exhaust port;

60. an air conditioner indoor unit; 610. a housing; 630. a base; 640. a heat exchanger; 650. fan blade part.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Referring to fig. 1 to 6, the fresh air system 10 includes a volute 100, a mounting box 200 and a filter assembly 300.

Fig. 4 shows a schematic structural diagram of an embodiment of the volute 100 of the fresh air system 10 according to the present invention. Referring to fig. 4, the scroll casing 100 has a first fan installation cavity 111.

Fig. 5 shows a schematic structural diagram of an embodiment of the fresh air system 10 according to the present invention. Referring to fig. 5, the mounting box 200 has an induced draft buffer cavity 211, the mounting box 200 is connected to the volute casing 100, so that the induced draft buffer cavity 211 is communicated with the first blower mounting cavity 111, and an induced draft inlet 220 communicated with the induced draft buffer cavity 211 is opened on the mounting box 200.

Referring to fig. 5, the filter assembly 300 is disposed in the induced draft buffer cavity 211, and the filter assembly 300 is used for filtering the air flowing from the induced draft buffer cavity 211 to the first fan installation cavity 111. The filter assembly 300 is provided to purify the air quality of the airflow entering the indoor environment through the fresh air system 10, improving user comfort.

Fig. 1 shows an exploded view of one embodiment of a fresh air system 10 according to the present invention. Referring to fig. 1, the mounting box 200 is provided with a first opening 230 communicating with the induced draft buffer cavity 211, so that the filter assembly 300 is inserted into the induced draft buffer cavity 211 or drawn out of the induced draft buffer cavity 211 through the first opening 230. The mounting box 200 is provided with a first opening 230, and when the filter assembly 300 needs to be disassembled, the filter assembly 300 only needs to be removed from the mounting box 200 through the first opening 230; when it is desired to install the filter assembly 300 in the fresh air system 10, it is also only necessary to move the filter assembly 300 into the mounting box 200 through the first opening 230. The assembling and disassembling steps of the filter assembly 300 in the fresh air system 10 are simplified, and the problem that the filter assembly 300 in the fresh air system in the prior art is complex to assemble and disassemble is solved.

In some embodiments, the scroll casing 100 has a first fan installation cavity 111 and a second fan installation cavity 112, the installation box 200 has an induced draft buffer cavity 211 and a discharge buffer cavity 212, the first fan installation cavity 111 communicates with the induced draft buffer cavity 211, and the second fan installation cavity 112 communicates with the discharge buffer cavity 212.

Referring to fig. 5, the fresh air system 10 includes a first side plate 240. The first side plate 240 is disposed in the mounting box 200, and the first side plate 240 and the inner surface of the mounting box 200 form a receiving cavity for receiving the filter assembly 300.

When the filter assembly 300 is installed, the side of the filter assembly 300 extends into the accommodating cavity and abuts against the first side plate 240, so that the filtering efficiency of the filter assembly 300 is improved, and unfiltered fresh air is prevented from entering the first fan installation cavity.

Fig. 3 shows a schematic structural diagram of an embodiment of a filter assembly 300 of the fresh air system 10 according to the present invention. Referring to fig. 3, the filter assembly 300 may include a filter mesh 310 and a filter mesh fixing frame 320. The filter screen 310 may be an electrostatic dust removal filter screen, and the filter screen fixing frame 320 has a mounting opening in which the electrostatic dust removal filter screen is disposed, so as to realize connection of the filter screen fixing frame 320 and the electrostatic dust removal filter screen. The accommodating cavity can be further provided with a power supply part, and the electrostatic dust removal filter screen is provided with a power receiving part matched with the power supply part. The power supply part can be a metal spring piece or a metal spring, the power supply part is electrically connected with a controller, and the controller supplies power to the electrostatic dust removal filter screen. When the filter assembly 300 is in a working state, the controller energizes the electrostatic precipitation filter screen to filter the airflow entering the first fan installation cavity 111 from the induced draft buffer cavity 211; when the filter assembly 300 is in the non-operating state, the controller powers off the electrostatic precipitation filter screen, and the electrostatic precipitation filter screen does not operate. When the filter screen assembly adopts the electrostatic dust removal filter screen to filter the airflow, the electrostatic dust removal filter screen can be washed, so that the use times of the filter screen are increased, and the cost is further reduced; but also to filter a larger volume of gas flow.

In some embodiments, filter assembly 300 includes a filter screen mounting frame 320 and a shock absorbing structure disposed around the outside of filter screen mounting frame 320. When the filter assembly 300 is in the installed state, the side of the anti-vibration structure abuts against the first side plate 240. A shockproof structure is arranged on the outer side of the filter screen fixing frame 320, so that on one hand, the filter assembly 300 can be prevented from colliding with the first side plate 240 to damage the filter screen fixing frame 320 when being inserted into the induced draft buffer cavity 211; on the other hand, the shockproof structure and the accommodating cavity are in interference fit, and the side edge of the shockproof structure is abutted to the first side plate 240 so as to mount the filter assembly 300 in place, thereby preventing the position of the filter assembly 300 from moving.

In some embodiments, the material of the shock absorbing structure is a foam, or an Ethylene Vinyl Acetate (EVA). The shock absorbing structure may be made of a softer material such as foam or EVA to ensure that the filter assembly 300 fits within the receiving cavity.

In some embodiments. The fresh air system 10 includes a first cover plate. A first cover plate is detachably covered at the first opening 230, and the first cover plate is detachably connected with the mounting box 200.

In some embodiments, the mounting box 200 may include circumferential side plates and end plates. The end plate is disposed on a side of the circumferential side plate away from the volute 100, and the end plate and the circumferential side plate may enclose an induced air buffer cavity 211 and an exhaust air buffer cavity 212.

In some embodiments, the induced air intake 220 and the exhaust 250 may be opened on the end plate.

Referring to fig. 1, the first opening 230 is opened on a circumferential side plate of the mounting box 200. When the first cover plate is in the installed state, the side of the first cover plate away from the filter assembly 300 is flush with the outer surface of the circumferential side plate.

In some embodiments, the first cover plate may be provided with an elastic hook, and the elastic hook extends into the first opening 230 and then is limited and stopped by the inner surface of the circumferential side plate, so as to detachably connect the first cover plate and the mounting box 200

Referring to fig. 1, the fresh air system 10 includes a first fan 512. The first fan 512 is installed in the first fan installation cavity 111.

The first opening 230 is a strip-shaped opening, and an opening plane where the first opening 230 is located is parallel to an axis of the first fan 512. The projection of the axis of the first fan 512 on the opening plane is perpendicular to the extending direction of the first opening 230.

In some embodiments, the angle between the insertion direction of filter assembly 300 and the filtration direction of filter assembly 300 is greater than or equal to 45 °, and less than or equal to 135 °.

Fig. 2 shows a schematic structural diagram of an embodiment of a fresh air system 10 according to the present invention. Referring to fig. 2, the mounting box 200 also has a venting buffer chamber 212.

Referring to fig. 4, the volute 100 also has a second fan mounting cavity 112.

In some embodiments, the fresh air system 10 includes a first fan 511 and a first fan 512. The first fan 511 is installed in the first fan installation cavity 111, and the first fan 512 is installed on one side of the inner wall of the volute 100 far away from the installation box 200. The first fan 512 is drivingly connected to the first blade 511 to drive the first blade 511 to rotate. In some embodiments, the first fan 512 and the first fan blade 511 rotate in the same direction to facilitate on-line installation.

In some embodiments, the fresh air system 10 includes a second fan blade 521 and a second fan. The second fan blade 521 is installed in the second fan installation cavity 112, and the second fan 522 is installed on one side of the inner wall of the volute 100, which is far away from the installation box 200. The second fan 522 is in driving connection with the second fan blade 521 to drive the second fan blade 521 to rotate. In some embodiments, the second fan 522 and the second fan blade 521 rotate in the same direction to facilitate on-line installation.

In some embodiments, the induced air motor and the exhaust air motor may employ a stepping motor.

Referring to fig. 1, the volute 100 includes a volute body 120 and a volute cover plate 400 that covers the volute body 120.

Referring to fig. 1, a first cover plate opening 410 and a second cover plate opening 420 are formed in the volute cover plate 400, the induced draft buffer cavity 211 is communicated with the first fan installation cavity 111 through the first cover plate opening 410, and the exhaust buffer cavity 212 is communicated with the second fan installation cavity 112 through the second cover plate opening 420.

In some embodiments, the mounting box 200 is provided with an air outlet 250 communicated with the air exhaust buffer cavity 212, the volute cover plate 400 is further provided with an air exhaust inlet 260, and the air exhaust inlet 260 is communicated with the second fan mounting cavity 112.

Fig. 6 shows a schematic structural diagram of an embodiment of an air conditioner indoor unit 60 according to the present invention. Referring to fig. 6, the air conditioner indoor unit 60 includes a casing 610 and a fresh air system 10 disposed in the casing 610, wherein the fresh air system 10 is the fresh air system 10 of the above embodiment. The air conditioner indoor unit 60 further includes a base 630, a heat exchanger 640, and a vane member 650. The fresh air system 10 is fixedly arranged on the base 630, the fan blade component 650 is arranged at the upstream of the heat exchanger 640, and the fresh air system 10 is arranged at the upstream of the fan blade component 650.

In the first embodiment, the ventilation system 10 can be used to introduce ventilation air separately. When the first fan 512 is started, the first fan blades 511 drive the airflow to enter the induced air buffer cavity 211 from the induced air inlet 220, and the airflow is filtered by the filter assembly 300, flows to the first fan installation cavity 111 through the first cover plate opening 410, and finally flows out from the induced air outlet 513. At this time, the second fan 522 is not started, so that the electric quantity is saved. An induced air outlet 513 may be opened on the volute body 120, the induced air outlet communicating with the first fan mounting chamber 111.

In a second embodiment, the fresh air system 10 can be independently vented. When the second fan 522 is started, the second fan 521 drives the airflow to enter the second fan installation cavity 112 from the exhaust air inlet 260, flow to the exhaust buffer cavity 212 through the second cover plate opening 420, and finally flow out from the exhaust opening 250. At this time, the second fan 522 is not started, so that the electric quantity is saved.

In a third embodiment, the fresh air system 10 can be used for introducing fresh air and exhausting foul air simultaneously. The first fan 512 and the second fan 522 are simultaneously started, and the fresh air and the foul air respectively flow to the induced air exhaust port and the air exhaust port 250 through the induced air inlet 220 and the air exhaust inlet 260, so that the quality of the indoor environment is improved. The fresh air system 10 has the kinetic energy of fresh air introduction and foul air exhaust at the same time, and the two functions can be used at the same time, and at the moment, the first fan 512 and the second fan 522 are started at the same time; the two functions can also be used independently according to the user's needs, and at this time, the first fan 512 and the second fan 522 are separately turned on to meet different needs of the user.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "first," "second," "third," "fourth," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In the description of the embodiments of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "horizontal", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the products of the present invention are used, and are only for convenience of description of the present invention and simplification of description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

It should also be noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.

In the description herein, references to the description of the term "some embodiments," or "other embodiments," or "in a first embodiment," or "in a second embodiment," or "in a third embodiment," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. And the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:

the utility model discloses a new trend system includes spiral case, mounting box and filtering component. The filter assembly is arranged in the induced draft buffer cavity of the mounting box, and the filter assembly is used for filtering gas flowing into the first fan mounting cavity from the induced draft buffer cavity and is provided with a first opening communicated with the induced draft buffer cavity on the mounting box, so that the filter assembly is inserted into the induced draft buffer cavity or is drawn out from the induced draft buffer cavity through the first opening. The mounting box is provided with a first opening, and when the filter assembly needs to be disassembled, the filter assembly only needs to be moved out of the mounting box through the first opening; when the filter component needs to be installed in the fresh air system, the filter component only needs to be moved into the installation box through the first opening. The disassembly and assembly steps of the filter assembly in the fresh air system are simplified, and the problem that the filter assembly in the fresh air system in the prior art is complex to disassemble and assemble is solved.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a new trend system, its characterized in that, new trend system includes:

a volute (100), the volute (100) having a first fan mounting cavity (111);

the mounting box (200) is provided with an induced draft buffer cavity (211), the mounting box (200) is connected with the volute (100) so that the induced draft buffer cavity (211) is communicated with the first fan mounting cavity (111), and an induced draft air inlet (220) communicated with the induced draft buffer cavity (211) is formed in the mounting box (200);

the filter assembly (300) is arranged in the induced draft buffer cavity (211), and the filter assembly (300) is used for filtering the gas flowing from the induced draft buffer cavity (211) to the first fan installation cavity (111);

the mounting box (200) is provided with a first opening (230) communicated with the induced draft buffer cavity (211), so that the filter assembly (300) is inserted into the induced draft buffer cavity (211) or is extracted from the induced draft buffer cavity (211) through the first opening (230).

2. The fresh air system as claimed in claim 1, wherein the fresh air system comprises:

a first side plate (240), wherein the first side plate (240) is arranged in the mounting box (200), and the first side plate (240) and the inner surface of the mounting box (200) form a containing cavity for containing the filter assembly (300);

when the filter assembly (300) is in an installation state, the side edge of the filter assembly (300) extends into the accommodating cavity and abuts against the first side plate (240).

3. The fresh air system of claim 2,

the filter assembly (300) comprises a filter screen fixing frame (320) and a shockproof structure arranged around the outer side of the filter screen fixing frame (320);

when the filter assembly (300) is in an installation state, the side edge of the shockproof structure is abutted against the first side plate (240).

4. The fresh air system of claim 3,

the shockproof structure is made of foam plastics or ethylene-vinyl acetate copolymer.

5. The fresh air system as claimed in claim 1, wherein the fresh air system comprises:

the first cover plate is detachably arranged at the first opening (230) in a covering mode, and the first cover plate is detachably connected with the mounting box (200).

6. The fresh air system of claim 5,

the first opening is formed in a first circumferential side plate of the mounting box;

when the first cover plate is in the mounting state, the side face of the first cover plate, which is far away from the filter assembly (300), is flush with the outer surface of the first circumferential side plate.

7. The fresh air system as claimed in claim 1, wherein the fresh air system comprises:

a first fan (512), wherein the first fan (512) is installed in the first fan installation cavity (111);

the first opening (230) is a strip-shaped opening, and the opening plane where the first opening (230) is located is parallel to the axis of the first fan (512);

the projection of the axis of the first fan (512) on the opening plane is perpendicular to the extending direction of the first opening (230).

8. The fresh air system of claim 1,

the angle between the insertion direction of the filter assembly (300) and the filtering direction of the filter assembly (300) is greater than or equal to 45 DEG and less than or equal to 135 deg.

9. The fresh air system of claim 1,

the volute is also provided with a second fan installation cavity (112), and the installation box is also provided with an exhaust buffer cavity (212);

the volute (100) comprises a volute main body (120) and a volute cover plate (400) covered on the volute main body (120);

the volute cover plate (400) is provided with a first cover plate opening (410) and a second cover plate opening (420), the induced draft buffer cavity (211) is communicated with the first fan installation cavity (111) through the first cover plate opening (410), and the exhaust buffer cavity (212) is communicated with the second fan installation cavity (112) through the second cover plate opening (420).

10. An indoor unit of an air conditioner comprises a machine shell (610) and a fresh air system (10) arranged in the machine shell (610),

the fresh air system (10) is as claimed in any of claims 1 to 9.