CN219868529U - Combustion chamber shell and gas water heater - Google Patents

Abstract

The utility model discloses a combustion chamber shell which comprises at least three side plate assemblies, wherein all the side plate assemblies are mutually enclosed to form a combustion chamber, each group of side plate assemblies comprises side plates and a heat insulation piece, the side walls of the side plates are provided with mounting grooves, and the heat insulation pieces are mounted in the mounting grooves. In each group of side plate assemblies, at least one limiting plate is arranged on the periphery of the mounting groove, the limiting plate can be bent relative to the periphery of the mounting groove to be close to the heat insulation piece, and the limiting plate can be abutted to the heat insulation piece and limit the heat insulation piece in the mounting groove. Therefore, when the heat insulating piece is installed, the heat insulating piece is only required to be placed in the installation groove, and then the limit plate is bent towards the heat insulating piece relative to the periphery of the installation groove and is abutted against the heat insulating piece, so that the heat insulating piece can be limited in the installation groove, and the heat insulating piece is not easy to break away from the installation groove. In addition, the utility model also discloses a gas water heater with the combustion chamber shell.

Description

Combustion chamber shell and gas water heater

Technical Field

The utility model relates to the technical field of gas water heaters, in particular to a combustion chamber shell and a gas water heater.

Background

The combustion chamber shell of the existing gas water heater is mainly made of metal, is easy to conduct heat, and further is easy to raise the temperature around the combustion chamber, so that the surface temperature of the machine is too high, and safety accidents are easy to occur. In order to improve the heat insulating performance of the combustion chamber housing, a heat insulating plate is usually installed in the combustion chamber housing. However, in the prior art, the heat insulation plate is usually installed on the combustion chamber shell through a plurality of bolt fasteners, and when the heat insulation plate is installed, a worker is required to screw the plurality of bolt fasteners, so that time and labor are wasted, the efficiency is low, and in addition, the condition that bolts are loosened in the use process can also exist, so that the normal operation of the combustor in the combustion chamber is influenced.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides a combustion chamber shell which can facilitate the installation of a heat insulating piece.

The utility model also provides a gas water heater with the combustion chamber shell.

According to an embodiment of the utility model, a combustion chamber housing comprises at least three side plate assemblies, all the side plate assemblies are mutually enclosed to form a combustion chamber, and each group of side plate assemblies comprises: a side plate, the side wall of which is provided with a mounting groove; the heat insulation piece is arranged in the mounting groove; the periphery of the installation groove is provided with at least one limiting plate, the limiting plate can be bent relative to the periphery of the installation groove to be close to the heat insulation piece, and the limiting plate can be abutted to the heat insulation piece and limit the heat insulation piece in the installation groove.

The combustion chamber shell provided by the embodiment of the utility model has at least the following beneficial effects:

the side wall of the side plate is provided with the mounting groove for mounting the heat insulating piece, and the periphery of the mounting groove is provided with at least one limiting plate capable of bending relative to the periphery of the mounting groove. Therefore, the combustion chamber shell provided by the embodiment of the utility model has a simple structure and is convenient for installing the heat insulation piece.

According to some embodiments of the utility model, at least two limiting plates are arranged on the periphery of the mounting groove, and two adjacent limiting plates are arranged at intervals.

According to some embodiments of the utility model, the at least one limiting plate comprises two bending parts and a connecting part, wherein the bending parts are arranged at intervals, the two bending parts can bend towards the heat insulation part relative to the periphery of the mounting groove, and the connecting part is connected to the free ends of the two bending parts.

According to some embodiments of the utility model, the mounting plate is formed by bending a peripheral edge of the mounting groove of one of the side plates toward an outside of the mounting groove.

According to some embodiments of the utility model, the mounting plate is arranged at the lower side edge of the mounting groove, two limiting plates are arranged at the lower side edge of the mounting groove, and the two limiting plates are correspondingly arranged at two sides of the mounting plate.

According to some embodiments of the utility model, the side plate has four sides, each side is provided with a baffle, and the mounting groove is formed by surrounding all the baffles and the side plate.

According to some embodiments of the utility model, the baffles are formed by corresponding lateral bends.

According to some embodiments of the utility model, all the side plate assemblies include a first side plate assembly and a second side plate assembly which are adjacently arranged, wherein the side plate is a first side plate, the baffle is a first baffle, and the mounting groove is a first mounting groove; the second side plate assembly is characterized in that the side plate is a second side plate, the baffle is a second baffle, and the mounting groove is a second mounting groove; one end of the first side plate assembly extends into the second mounting groove and is connected with the second side plate assembly through a fastener.

According to some embodiments of the utility model, the second baffle plate of the second side plate near one end of the first side plate is abutted against the first side plate and connected with the first side plate through a screw fastener; and/or the first baffle plate positioned in the second mounting groove is abutted against the second side plate and connected with the second side plate through a screw fastener.

The gas water heater according to the embodiment of the utility model comprises the combustion chamber shell of any one of the embodiments.

The gas water heater provided by the embodiment of the utility model has at least the following beneficial effects:

through setting up the combustion chamber casing of arbitrary embodiment, this combustion chamber casing simple structure just is convenient for the installation of thermal-insulated piece, and then can be convenient for gas heater's production and processing to make the combustion chamber casing possess better thermal-insulated performance in the gas heater.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic view of a combustor casing according to an embodiment of the present utility model;

FIG. 2 is an exploded schematic view of the combustor casing shown in FIG. 1;

FIG. 3 is an exploded schematic view of the combustor casing shown in FIG. 2;

FIG. 4 is a schematic view of a side plate according to an embodiment of the utility model;

FIG. 5 is a schematic view of a side plate according to another embodiment of the present utility model;

FIG. 6 is a schematic cross-sectional view of a combustor casing according to an embodiment of the present utility model;

fig. 7 is an enlarged partial schematic view at a in fig. 6.

Reference numerals:

the side plate assembly 100, the first side plate assembly 101, the second side plate assembly 102, the side plate 110, the first side plate 111, the second side plate 112, the baffle 120, the first baffle 121, the second baffle 122, the limiting plate 130, the bending portion 131, the connecting portion 132, the mounting plate 140, the mounting groove 150, the heat insulator 160, the first heat insulator 161, and the second heat insulator 162.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Referring to fig. 1 to 5, an embodiment of the present utility model provides a combustion chamber housing, which includes four side plate assemblies 100, all the side plate assemblies 100 enclose each other to form a combustion chamber, each set of side plate assemblies 100 includes side plates 110 and a heat insulation member 160, the side walls of the side plates 110 have mounting grooves 150, and the heat insulation member 160 is mounted in the mounting grooves 150. In each set of side plate assemblies 100, at least one limiting plate 130 is disposed at the periphery of the mounting groove 150, the limiting plate 130 can be bent close to the heat insulating member 160 relative to the periphery of the mounting groove 150, and the limiting plate 130 can abut against the heat insulating member 160 and limit the heat insulating member 160 in the mounting groove 150.

In the above-mentioned structure, by providing the side wall of the side plate 110 with the installation groove 150 in which the heat insulator 160 is installed and providing at least one limiting plate 130 capable of being bent with respect to the periphery of the installation groove 150 at the periphery of the installation groove 150, when the heat insulator 160 is installed, only the heat insulator 160 needs to be placed in the installation groove 150, and then the limiting plate 130 is bent with respect to the periphery of the installation groove 150 toward the heat insulator 160 and the limiting plate 130 is abutted against the heat insulator 160, thereby limiting the heat insulator 160 in the installation groove 150, so that the heat insulator 160 is not easy to be separated from the installation groove 150. It can be seen that the combustion chamber housing of the embodiment of the present utility model has a simple structure and facilitates installation of the heat insulating member 160.

It is to be understood that the heat insulating member 160 may be a heat insulating plate or a heat insulating cotton, and the present utility model is not limited thereto.

It should be understood that the above-mentioned combustion chamber housing includes four side plate assemblies 100, only for one exemplary illustration of fig. 1 to 5, the specific number of side plate assemblies 100 may be four, three, five or more, and the present utility model is not limited thereto, and the combustion chamber housing need only include at least three side plate assemblies 100.

Referring to fig. 1 to 4, in some embodiments, the mounting groove 150 is provided at a periphery thereof with at least two limiting plates 130, and adjacent two limiting plates 130 are spaced apart.

In the above structure, by providing at least two limiting plates 130 arranged at intervals, the heat insulator 160 can be pressed from more positions, so that the heat insulator 160 is better limited in the mounting groove 150, and the heat insulator 160 is further prevented from falling out of the mounting groove 150.

Specifically, referring to fig. 1 to 4, four limiting plates 130 are disposed at the periphery of the installation groove 150, the installation groove 150 has four sidewalls, and two of the limiting plates 130 are disposed at edges of two opposite sidewalls corresponding to the other two limiting plates 130, thereby better limiting the heat insulating member 160 in the installation groove 150 and further avoiding the heat insulating member 160 from being separated from the installation groove 150.

Referring to fig. 1 to 4, in some embodiments, at least one of the limiting plates 130 includes two bending portions 131 arranged at intervals, and one connecting portion 132, the two bending portions 131 being capable of bending toward the heat insulating member 160 with respect to the circumference of the mounting groove 150, and the connecting portion 132 being connected to free ends of the two bending portions 131. The free end of the bending portion 131 specifically refers to an end of the bending portion 131 away from the periphery of the mounting groove 150.

In the above structure, compared with the whole plate which is bent towards the heat insulation part 160 and is abutted against the heat insulation part 160 relative to the periphery of the mounting groove 150, the limit plate 130 is arranged to be two bending parts 131 and one connecting part 132, the whole plate is not required to be bent, and only the two bending parts 131 are required to be bent, so that the bending difficulty of the limit plate 130 is reduced, and the heat insulation part 160 is more convenient and labor-saving to mount. In addition, by providing the limiting plate 130 as two bending portions 131 and one connecting portion 132, through holes are formed between the two bending portions 131, one connecting portion 132, and the peripheral edges of the installation groove 150, thereby increasing the area of the heat insulating material 160 exposed in the combustion chamber, and further enhancing the heat insulating effect of the heat insulating material 160.

Specifically, referring to fig. 1 to 4, in some embodiments, four limiting plates 130 are provided at the periphery of the mounting groove 150, wherein two limiting plates 130 are formed of two bending portions 131 and one connecting portion 132 that are arranged at intervals.

Referring to fig. 1 to 5, in some embodiments, the combustion chamber housing further includes a mounting plate 140 for connection with the burner, the mounting plate 140 being formed by bending a peripheral edge of the mounting groove 150 of one of the side plates 110 toward an outside of the mounting groove 150.

In the above structure, the mounting plate 140 is used to connect with the burner so as to mount the burner to the combustion chamber housing so that the gas can be burned in the combustion chamber. The mounting plate 140 is formed by bending the periphery of the mounting groove 150 of one side plate 110 toward the outside of the mounting groove 150, thereby facilitating the processing and forming of the mounting plate 140 and further making the processing of the whole combustion chamber housing simpler and more convenient.

As can be appreciated with reference to fig. 1-5, the combustor housing includes four side plate assemblies 100 and two oppositely disposed mounting plates 140, with two mounting plates 140 being correspondingly disposed about the periphery of the mounting slots 150 of the oppositely disposed side plates 110. By arranging two mounting plates 140 which are oppositely arranged, the mounting balance of the burner is improved, and the connection between the burner and the combustion chamber shell is firmer.

It will be appreciated that referring to fig. 1-4, the mounting plate 140 is provided with a plurality of mounting holes, which facilitates connection between the combustion chamber housing and the combustion chamber.

Referring to fig. 1 to 4, the mounting plate 140 is disposed at a lower side edge of the mounting groove 150, two limiting plates 130 are further disposed at the lower side edge of the mounting groove 150, and the two limiting plates 130 are disposed at two sides of the mounting plate 140.

In the above-described structure, the two limiting plates 130 are disposed at both sides of the mounting plate 140, thereby effectively utilizing the lower side edges of the mounting groove 150, and preventing the heat insulating member 160 from being separated from the lower side of the mounting groove 150 while facilitating the connection of the burner.

Referring to fig. 1 to 4, in some embodiments, the side plate 110 has four sides, each side is provided with a baffle 120, and the mounting groove 150 is formed by enclosing all the baffles 120 and the side plate 110 with each other.

In the above-mentioned structure, by arranging the baffle plates 120 on the four sides of the side plate 110, the installation groove 150 for installing the heat insulating member 160 is formed by surrounding all the baffle plates 120 and the side plate 110, wherein the arrangement of the baffle plates 120 is simple and convenient, and the processing of the installation groove 150 can be facilitated.

It will be appreciated that at least one limiting plate 130 is disposed on the periphery of the mounting groove 150, specifically, referring to fig. 1 to 4, at least one baffle 120 is provided with the limiting plate 130, the limiting plate 130 can be bent relatively to the periphery of the mounting groove 150 to be close to the heat insulating member 160, and the limiting plate 130 can abut against the heat insulating member 160 and define the heat insulating member 160 in the mounting groove 150.

It will be appreciated that in some embodiments, referring to fig. 1-4, the combustor housing further includes a mounting plate 140 for connection with the burner, the mounting plate 140 being formed by bending the periphery of the mounting slot 150 of one of the side plates 110 towards the outside of the mounting slot 150. Specifically, the mounting plate 140 is formed by bending one of the baffle plates 120 toward the outside of the mounting groove 150.

Referring to fig. 1-4, in some embodiments, the baffles 120 are specifically formed from corresponding side bends.

In the above structure, the baffle 120 is formed by bending, so that the structure is simple, the operation is convenient, and the processing of the installation groove 150 is more convenient and simple.

It should be understood that, instead of being formed by bending the corresponding side edges, the baffle 120 may be directly connected to each side edge of the side plate 110 by welding, that is, the baffle 120 is welded to the corresponding side edge, and of course, other connection manners of the baffle 120 to the side edge of the side plate 110 may be adopted, and the specific processing manner of the baffle 120 is not specifically limited.

Referring to fig. 1-7, in some embodiments, all of the side panel assemblies 100 include a first side panel assembly 101 and a second side panel assembly 102 disposed adjacent to each other, wherein in the first side panel assembly 101, the side panel 110 is a first side panel 111, the baffle 120 is a first baffle 121, the mounting slot 150 is a first mounting slot, and the thermal shield 160 is a first thermal shield 161. In the second side plate assembly 102, the side plate 110 is a second side plate 112, the baffle 120 is a second baffle 122, the mounting slot 150 is a second mounting slot, and the thermal shield 160 is a second thermal shield 162. Wherein one end of the first side plate assembly 101 extends into the second mounting groove and is connected to the second side plate assembly 102 by a fastener.

In the above-described structure, the first side plate assembly 101 and the second side plate assembly 102 are adjacently disposed, and by extending one end of the first side plate assembly 101 into the second mounting groove and connecting with the second side plate assembly 102 by the fastener, connection fixation between the two adjacent sets of side plate assemblies 100 can be achieved.

In particular, referring to fig. 6 and 7, in some embodiments, the number of side plate assemblies 100 is four, including two oppositely disposed first side plate assemblies 101 and two oppositely disposed second side plate assemblies 102, each first side plate assembly 101 being located between and disposed adjacent to two second side plate assemblies 102. Wherein, both ends of each first side plate assembly 101 correspondingly extend into the second installation grooves of the two second side plate assemblies 102 and are connected with the corresponding second side plate assemblies 102 through fasteners.

It will be appreciated that, to improve the connection compactness between the first side plate assembly 101 and the second side plate assembly 102, one end of the first side plate assembly 101 may be extended into the second mounting groove, such that the end of the first heat insulating member 161 near the second side plate 112 is located in the second mounting groove and abuts against the second heat insulating member 162, thereby improving the connection compactness between the first side plate assembly 101 and the second side plate assembly 102, and making the connection between the first side plate assembly 101 and the second side plate assembly 102 more compact and stable.

Referring to fig. 6 and 7, in some embodiments, the first baffle 121 positioned in the second mounting groove abuts the second side plate 112 and is connected to the second side plate 112 by a screw fastener.

In the above structure, the first side plate 111 has four sides, each side is provided with the first baffle 121, and the first mounting groove is formed by surrounding all the first baffle 121 and the first side plate 111. One end of the first side plate assembly 101 extends into the second installation groove, namely, one end of the first side plate 111 extends into the second installation groove, and the first baffle 121 located in the second installation groove is abutted to the second side plate 112 and connected with the second side plate 112 through a screw fastener, so that stable connection between the first side plate 111 and the second side plate 112 is facilitated, connection between the first side plate 111 and the second side plate 112 is more convenient, and connection between the first side plate assembly 101 and the second side plate assembly 102 is simpler and more convenient.

It can be understood that the first baffle 121 located in the second mounting groove abuts against the second side plate 112 and is connected with the second side plate 112 through a screw fastener, specifically, only the first screw mounting hole is formed on the first baffle 121 located in the second mounting groove during processing, and the second screw mounting hole corresponding to the first screw mounting hole is formed on the second side plate 112, so that the processing is also convenient.

It will be appreciated that, in addition to the connection between the first side plate 111 and the second side plate 112, the first baffle 121 located in the second mounting groove may abut against the second side plate 112 and be connected to the second side plate 112 by a screw fastener, or the second baffle 122 located at the end of the second side plate 112 near the first side plate 111 may abut against the first side plate 111 and be connected to the first side plate 111 by a screw fastener. In this structure, the second side plate 112 has four sides, each side is provided with a second baffle 122, and the second mounting groove is formed by surrounding all the second baffles 122 and the second side plate 112. One end of the first side plate assembly 101 extends into the second mounting groove, that is, one end of the first side plate 111 extends into the second mounting groove, and the second baffle 122 of the second side plate 112, which is close to one end of the first side plate 111, abuts against the first side plate 111 and is connected with the first side plate 111 through a screw fastener. Specifically, the second baffle 122 of the second side plate 112 near one end of the first side plate 111 is abutted against one side surface of the first side plate 111 deviating from the combustion chamber and connected with the first side plate 111 through a screw fastener, so that the stable connection between the first side plate 111 and the second side plate 112 is also facilitated, the connection between the first side plate 111 and the second side plate 112 is more convenient, and the connection between the first side plate assembly 101 and the second side plate assembly 102 is simpler and more convenient.

It can be understood that the second baffle 122 of the second side plate 112 near one end of the first side plate 111 abuts against the first side plate 111 and is connected with the first side plate 111 through a screw fastener, specifically, during processing, only a third screw mounting hole is formed in the second baffle 122 of the second side plate 112 near one end of the first side plate 111, and a second screw mounting hole corresponding to the third screw mounting hole is formed in the first side plate 111, so that the processing is also convenient.

It will be appreciated that, in order to make the connection between the first side plate 111 and the second side plate 112 more stable, the first baffle 121 located in the second mounting groove may be abutted against the second side plate 112 and connected to the second side plate 112 by a screw fastener, and at the same time, the second baffle 122 of the second side plate 112 near one end of the first side plate 111 may be abutted against the first side plate 111 and connected to the first side plate 111 by a screw fastener. Of course, in addition to this, the present utility model is not limited to the specific one, and only the first baffle 121 located in the second installation groove may be abutted against the second side plate 112 and connected to the second side plate 112 by a screw fastener, or only the second baffle 122 located at the end of the second side plate 112 near the first side plate 111 may be abutted against the first side plate 111 and connected to the first side plate 111 by a screw fastener.

An embodiment of the present utility model further provides a gas water heater, where the gas water heater is provided with the combustion chamber housing of any one of the embodiments.

Through setting up the combustion chamber casing of any embodiment, through set up mounting groove 150 and set up limiting plate 130 at the periphery of mounting groove 150 at curb plate 110 for the installation of insulating part 160 is more convenient simple, only needs to place insulating part 160 in mounting groove 150, then buckles limiting plate 130 to butt in insulating part 160 alright limit insulating part 160 in mounting groove 150, makes insulating part 160 be difficult for deviating from in the mounting groove 150. The combustion chamber shell is simple in structure and convenient to install the heat insulation piece 160, production and processing of the gas water heater can be facilitated, and the combustion chamber shell in the gas water heater has good heat insulation performance.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims (10)

1. The combustion chamber shell is characterized by comprising at least three side plate assemblies (100), wherein all the side plate assemblies (100) are mutually enclosed to form a combustion chamber, and each group of side plate assemblies (100) comprises:

a side plate (110), the side wall of the side plate (110) having a mounting groove (150);

a heat insulator (160) mounted in the mounting groove (150);

the periphery of the installation groove (150) is provided with at least one limiting plate (130), the limiting plate (130) can be bent to be close to the heat insulation piece (160) relative to the periphery of the installation groove (150), and the limiting plate (130) can be abutted to the heat insulation piece (160) and limit the heat insulation piece (160) in the installation groove (150).

2. The combustor casing according to claim 1, wherein at least two limiting plates (130) are provided at the periphery of the mounting groove (150), and adjacent two limiting plates (130) are arranged at intervals.

3. The combustion chamber housing according to claim 2, wherein at least one of the limiting plates (130) comprises two bending portions (131) arranged at intervals and one connecting portion (132), the two bending portions (131) being bendable towards the heat insulating member (160) with respect to the periphery of the mounting groove (150), the connecting portion (132) being connected to the free ends of the two bending portions (131).

4. The combustor casing according to claim 1, further comprising a mounting plate (140) for connection with a burner, the mounting plate (140) being formed by bending a peripheral edge of the mounting groove (150) of one of the side plates (110) toward an outside of the mounting groove (150).

5. The combustor casing according to claim 4, wherein the mounting plate (140) is provided at a lower side edge of the mounting groove (150), the lower side edge of the mounting groove (150) is provided with two limiting plates (130), and the two limiting plates (130) are correspondingly arranged at both sides of the mounting plate (140).

6. The combustor casing according to any one of claims 1 to 5, wherein the side plate (110) has four sides, each of which is provided with a baffle plate (120), and the mounting groove (150) is formed by all the baffle plates (120) and the side plate (110) being surrounded with each other.

7. The combustor casing of claim 6, wherein the baffles (120) are formed by the corresponding lateral bends.

8. The combustor casing of claim 6, wherein all of said side plate assemblies (100) comprise adjacently disposed first (101) and second side plate assemblies (102),

in the first side plate assembly (101), the side plate (110) is a first side plate (111), the baffle (120) is a first baffle (121), and the mounting groove (150) is a first mounting groove;

at the second side plate assembly (102), the side plate (110) is a second side plate (112), the baffle (120) is a second baffle (122), and the mounting groove (150) is a second mounting groove;

one end of the first side plate assembly (101) extends into the second mounting groove and is connected with the second side plate assembly (102) through a fastener.

9. The combustion chamber housing of claim 8,

the second baffle (122) of the second side plate (112) near one end of the first side plate (111) is abutted against the first side plate (111) and connected with the first side plate (111) through a screw fastener;

and/or the first baffle plate (121) positioned in the second mounting groove is abutted against the second side plate (112) and connected with the second side plate (112) through a screw fastener.

10. Gas water heater, characterized by comprising a combustion chamber housing according to any of claims 1 to 9.