Base and heat pump dish washing machine

Abstract

The utility model belongs to the technical field of kitchen appliances, and discloses a base and a heat pump dish-washing machine. The heat pump dish-washing machine comprises a compressor and a compressor driving plate assembly which are electrically connected, a groove body with an opening in the top is formed in the base, a protruding part facing the interior of the groove body is arranged on part of a wall plate of the base, a mounting cavity is formed in the protruding part and extends to the outer wall of the base to form an opening, and the groove body is used for mounting the compressor; the compressor driving plate assembly can be installed in the installation cavity through the opening. A mounting cavity is formed in the wall plate of the base, so that the compressor driving plate assembly is prevented from influencing the mounting space of other structural parts in the groove body, and the influence on the size of the base is small; the compressor driving plate assembly can be installed in the installation cavity from the outer side of the base through the opening, installation is convenient, and the operation difficulty is small. The compressor driving plate assembly is separated from the inner container above the groove body and the heat pump assembly in the groove body, and water overflowing from the inner container or condensate water formed by the heat pump assembly is prevented from making contact with the compressor driving plate assembly.

Description

Technical Field

[0001] This utility model relates to the field of kitchen appliance technology, and in particular to a base and a heat pump dishwasher. Background Technology

[0002] As relevant standards continue to raise the energy efficiency requirements for dishwashers, a technology has emerged in the industry that uses a heat pump system to heat the washing water, which can significantly reduce the energy consumption of dishwashers. The heat pump system includes a compressor, an evaporator, and a condenser, which are connected end-to-end to form a refrigerant circulation path. The refrigerant exchanges heat with the washing water in the condenser to heat the water.

[0003] Because the dishwasher has added a heat pump system, the available space in the base is very small, and the large size of the compressor and other high-power loads makes it difficult to install the compressor drive board in the base. There is also a risk that the compressor drive board will come into contact with water, posing a safety hazard. Utility Model Content

[0004] The purpose of this utility model is to provide a base and a heat pump dishwasher that can solve the problems of difficult installation of the compressor drive board in the base and potential safety hazards.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A base for a heat pump dishwasher, the heat pump dishwasher including an electrically connected compressor and a compressor drive plate assembly, the base forming a groove with a top opening, a portion of the base wall having a protrusion facing the interior of the groove, the protrusion having a mounting cavity formed therein, the mounting cavity extending to the outer wall of the base to form an opening, the groove for mounting the compressor, the compressor drive plate assembly being able to be inserted into the mounting cavity through the opening.

[0007] As an alternative to the aforementioned base, the opening is located on the circumferential outer wall of the base.

[0008] As an alternative to the aforementioned base, a fixing part is provided on the outer wall of the side of the base where the opening is provided, and the fixing part is detachably connected to the compressor drive plate assembly.

[0009] And / or, the opening is located on the rear sidewall of the base.

[0010] As an alternative to the aforementioned base, the inner wall of the mounting cavity is provided with a limiting rib, which can abut against the compressor drive plate assembly, so that a portion of the inner wall of the mounting cavity is spaced apart from the compressor drive plate assembly.

[0011] As an optional solution for the aforementioned base, the top surface of the mounting cavity is provided with the limiting rib;

[0012] The dimensions of the mounting cavity in the left-right direction are adapted to the dimensions of the compressor drive board assembly in the left-right direction.

[0013] As an alternative to the aforementioned base, the heat pump dishwasher also includes a condenser, which is connected to the compressor. The protrusion forms a condenser mounting base, which supports the condenser.

[0014] As an alternative to the aforementioned base, a compressor mounting position is provided in the groove, the compressor mounting position is located on one side of the protrusion, and the compressor mounting position is used to install the compressor.

[0015] As an optional solution for the aforementioned base, the base is provided with a cable outlet, which connects the mounting cavity and the interior of the groove.

[0016] The base is provided with a main control mounting position for mounting the main control board assembly. The heat pump dishwasher also includes a power supply harness and a communication harness. The power supply harness connects the main control board assembly and the compressor drive board assembly, and the communication harness connects the compressor drive board assembly and the compressor. Both the power supply harness and the communication harness pass through the outlet.

[0017] As an optional solution for the aforementioned base, the base is provided with a compressor mounting position, the compressor mounting position is used to install the compressor, and the mounting cavity is located between the compressor mounting position and the main control mounting position;

[0018] And / or, the main control mounting position is located on the side of the base.

[0019] A heat pump dishwasher includes:

[0020] A heat pump assembly, the heat pump assembly including a compressor;

[0021] A compressor drive board assembly, electrically connected to the compressor;

[0022] In the aforementioned base, the compressor drive board assembly is disposed within the mounting cavity, and the compressor is disposed within the slot.

[0023] The beneficial effects of this utility model are:

[0024] The base provided by this utility model has an installation cavity formed inside the base wall panel, which can make full use of the available space of the base and avoid the compressor drive board assembly from affecting the installation space of other structural components in the tank, thus having little impact on the size of the base. The opening is set on the outer wall of the base, so that the compressor drive board assembly can be installed into the installation cavity from the outside of the base through the opening, which is convenient and easy to operate. The tank is surrounded by the base wall panel, and the installation cavity is located inside the base wall panel, which separates the compressor drive board assembly from the inner tank above the tank and the heat pump assembly inside the tank. This prevents water overflowing from the inner tank or condensate formed by the heat pump assembly from coming into contact with the compressor drive board assembly, ensuring electrical safety and eliminating safety hazards. Attached Figure Description

[0025] Figure 1 This is a first structural schematic diagram of a portion of the structure of the heat pump dishwasher provided by this utility model;

[0026] Figure 2 This is a second structural schematic diagram of a portion of the heat pump dishwasher provided by this utility model.

[0027] In the picture:

[0028] 10. Base; 11. Base plate; 12. Front plate; 13. Side plate; 14. Back plate; 141. Opening; 15. Protrusion; 151. Cable outlet; 152. Limiting rib; 20. Heat pump assembly; 21. Compressor; 22. Evaporator; 23. Condenser; 30. Main control board assembly; 40. Compressor drive board assembly; 41. Fixing lug. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0030] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] 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.

[0032] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0033] like Figure 1 As shown, this embodiment provides a heat pump dishwasher, including a base 10, a housing, a door, an inner tub, a spray mechanism, and a heat pump assembly 20. The base 10 is connected to the housing, forming a cavity with a front opening. The door is movably connected to the housing to open or close the cavity. The spray mechanism, the heat pump assembly 20, and the inner tub are all disposed within the cavity. The inner tub is fixed to the base 10, and a washing chamber is formed within the inner tub. A loading / unloading port is provided on the front side of the inner tub, through which tableware or cookware to be washed can be placed into the washing chamber. At least the spray end of the spray mechanism is located within the washing chamber, and the spray mechanism is used to spray washing water into the washing chamber. The heat pump assembly 20 is located below the inner tub and is used to heat the washing water. When the dishwasher is operating, the washing water is heated by the heat pump assembly 20 and then enters the spray mechanism, and is sprayed onto the tableware or cookware to be washed, achieving the purpose of cleaning.

[0034] The heat pump assembly 20 includes a compressor 21, an evaporator 22, and a condenser 23. The evaporator 22, compressor 21, and condenser 23 are connected end-to-end to form a circulating medium channel for heat exchange. The heat exchange medium in the circulating heat exchange channel can exchange heat with the washing water in the condenser 23 to transfer heat to the washing water, thereby heating the washing water. Specifically, the evaporator 22 absorbs heat from the environment to raise the temperature of the refrigerant. The heated refrigerant is then compressed by the compressor 21 to obtain a high-temperature, high-pressure refrigerant. This high-temperature, high-pressure refrigerant enters the condenser 23 and exchanges heat with the washing water, thus heating the washing water.

[0035] like Figure 1As shown, the base 10 forms a groove with an open top, and the heat pump assembly 20 is disposed in the groove so as to utilize the internal space of the base 10 to install the heat pump assembly 20, thereby reducing the impact of adding the heat pump assembly 20 on the installation space of other components in the dishwasher.

[0036] Because of the heat pump assembly 20, the heat pump dishwasher also includes a compressor drive board assembly 40, which is electrically connected to the compressor 21 and used to control the start and stop of the compressor 21. Due to the high power of the compressor 21, the compressor drive board assembly 40 is relatively large. To facilitate the connection between the compressor 21 and the compressor drive board assembly 40, the compressor drive board assembly 40 is preferably mounted on the base 10 to simplify wiring. However, the limited space available on the base 10 makes the installation of the compressor drive board assembly 40 difficult and poses a risk of contact with water, thus creating a safety hazard.

[0037] To solve the above problems, such as Figure 1 and Figure 2 As shown, a portion of the wall panel of the base 10 is provided with a protrusion 15 facing the interior of the groove. An installation cavity is formed in the protrusion 15. The installation cavity extends to the outer wall of the base 10 to form an opening 141. The compressor drive plate assembly 40 can be inserted into the installation cavity through the opening 141. By forming an installation cavity in the protrusion 15, a portion of the space within the tank can be utilized to create the installation cavity, ensuring that the cavity has sufficient dimensions to accommodate the compressor drive plate assembly 40. This fully utilizes the available space of the base 10, preventing the compressor drive plate assembly 40 from affecting the installation space of other structural components within the tank and minimizing its impact on the dimensions of the base 10. The opening 141 is located on the outer wall of the base 10, allowing the compressor drive plate assembly 40 to be inserted into the installation cavity from the outside of the base 10 through the opening 141, making installation convenient and easy to operate. The tank is enclosed by the wall panels of the base 10, with the installation cavity located inside the wall panels of the base 10. This separates the compressor drive plate assembly 40 from the inner liner above the tank and the heat pump assembly 20 inside the tank, preventing water overflowing from the inner liner or condensate from the heat pump assembly 20 from contacting the compressor drive plate assembly 40, ensuring electrical safety and eliminating potential safety hazards.

[0038] To facilitate the installation of the compressor 21 drive assembly, the opening 141 is located on the circumferential outer wall of the base 10 to prevent it from being obstructed and to facilitate the installation and removal of the compressor drive plate assembly 40 through the opening 141. In this embodiment, the opening 141 is located on the rear outer wall of the base 10, allowing the compressor drive plate assembly 40 to be installed into the mounting cavity from the rear side of the base 10. When in use, the heat pump dishwasher is typically embedded in a kitchen cabinet. The opening 141, located on the rear side of the base 10, can be concealed within the cabinet, preventing accidental contact by the user and ensuring the safety of the heat pump dishwasher.

[0039] In other embodiments, the opening 141 can also be located on the left or right outer wall of the base 10, which can also achieve the effect of hiding the opening 141 inside the cabinet.

[0040] like Figure 2 As shown, in order to improve the fixing effect of the compressor drive board assembly 40, a fixing part is provided on the outer wall of the side of the base 10 with the opening 141. The fixing part is detachably connected to the compressor drive board assembly 40 to fix the compressor drive board assembly 40 and facilitate after-sales maintenance of the compressor drive board assembly 40.

[0041] In this embodiment, the fixing part is provided with a threaded hole. The fastener passes through the compressor drive plate assembly 40 and engages with the threaded hole to fix the compressor drive plate assembly 40 on the base 10. The fastener can be a screw.

[0042] In other embodiments, the fixing part can be connected to the compressor drive board assembly 40 by snap-fit ​​or magnetic adsorption. For example, the fixing part can be a snap-fit, and the compressor drive board assembly 40 is provided with a hook; the snap-fit ​​and the hook cooperate to fix the compressor drive board assembly 40.

[0043] In this embodiment, the compressor drive board assembly 40 includes a mounting box and a compressor 21 drive board disposed in the mounting box. The mounting box is provided with a fixing lug 41, and the mounting box can be inserted into the mounting cavity. The fixing lug 41 is located at the opening 141 and is used for detachable connection with the fixing part.

[0044] When the compressor 21 drive board is working, it will generate heat. In order to facilitate heat dissipation, the mounting box is provided with heat dissipation holes. The heat generated by the compressor 21 drive board can be dissipated to the outside of the mounting box through the heat dissipation holes, so as to reduce the temperature of the compressor 21 drive board and ensure that the compressor 21 drive board can work normally.

[0045] To facilitate heat dissipation of the compressor 21 drive board, a limiting rib 152 is provided on the inner wall of the mounting cavity. The fibrous rib can abut against the compressor drive board assembly 40, so that the compressor drive board assembly 40 can be spaced apart from part of the inner wall of the mounting cavity. This gap can serve as a heat dissipation channel, so that the heat generated by the compressor 21 drive board in the mounting box can be transferred to the outside of the base 10 through the heat dissipation holes and heat dissipation channel in sequence, thereby improving the heat dissipation effect of the compressor 21 drive board.

[0046] In this embodiment, the limiting rib 152 is disposed on the top surface of the mounting cavity, and the heat dissipation hole is disposed on the top surface of the mounting box, so that the heat dissipation hole can directly communicate with the heat dissipation channel. In other embodiments, the limiting rib 152 may be disposed on other inner walls of the mounting cavity, or the limiting rib 152 may be disposed on at least two side walls of the mounting cavity to increase the space between the mounting box and the mounting cavity.

[0047] Optionally, multiple limiting ribs 152 can be provided, with multiple limiting ribs 152 spaced apart to increase the contact area between the limiting ribs 152 and the mounting box. Multiple limiting ribs 152 result in more uniform force distribution on the mounting box, which is beneficial to improving the stability of the mounting box.

[0048] In this embodiment, a limiting rib 152 is provided on the top surface of the mounting cavity. The limiting rib 152 can abut the mounting box against the bottom surface of the mounting cavity, thereby achieving the positioning of the mounting box in the vertical direction, which is beneficial to improving the positioning and fixing effect of the compressor drive board assembly 40.

[0049] To improve the positioning accuracy of the mounting box within the mounting cavity, the dimensions of the mounting cavity in the left-right direction are matched with the dimensions of the mounting box in the left-right direction, thereby constraining the position of the mounting box in the left-right direction and improving the positioning and fixing effect of the compressor drive board assembly 40.

[0050] In this embodiment, the protrusion 15 is disposed on the bottom surface of the groove, and the mounting cavity can utilize the space of the protrusion 15 and the bottom side wall of the base 10. Specifically, the base 10 includes a base plate 11, a front plate 12, a back plate 14, and two side plates 13. The front plate 12 and the back plate 14 are spaced apart in the front-rear direction and are respectively connected to the front and rear edges of the base plate 11; the two side plates 13 are spaced apart in the left-right direction and are respectively connected to the left and right side edges of the base plate 11. The protrusion 15 is disposed on the base plate 11 and is connected to the back plate 14 to form an opening 141 on the outer surface of the back plate 14.

[0051] In other embodiments, the position of the protrusion 15 can be set according to actual needs. For example, the protrusion 15 can be provided on the back plate 14 or the side plate 13.

[0052] The heat pump dishwasher also includes a sink assembly and a water pump. The sink assembly includes a water cup and a water distribution valve. The water cup is located inside the base 10 and below the inner tub. The water cup is connected to a water source and to the washing chamber formed inside the inner tub. The water distribution valve connects the water cup and the spray mechanism, used to control the flow of washing water from the water cup and direct it into the spray mechanism. The condenser 23 has a first fluid channel and a second fluid channel. The first fluid channel is connected to the compressor 21 and the evaporator 22 respectively to form a circulating medium flow channel. One end of the second fluid channel is connected to the water cup via the water pump, and the other end is connected to the water distribution valve to form a circulating heating flow channel for the washing water.

[0053] When the heat pump dishwasher is working, the washing water enters the water cup and is pumped into the second fluid channel by the water pump to exchange heat with the refrigerant and be heated. The heated washing water enters the spray mechanism through the water distribution valve to spray the tableware or cookware in the washing chamber to achieve the purpose of cleaning. The washing water after spraying is collected at the bottom of the inner tank and enters the water cup. The above steps are repeated to achieve recycling.

[0054] Because condenser 23 needs to be connected to the water pump and the water distribution valve, its installation height is relatively high to be closer to the water tank assembly. Therefore, as... Figure 1 As shown, the protrusion 15 forms a condenser mounting base, which supports the condenser 23 to raise its position. Mounting the condenser 23 via the protrusion 15 not only raises its position but also eliminates the need for additional structures, thus maximizing the use of space within the base 10.

[0055] In this embodiment, the protrusion 15 includes a support block and at least one upright plate disposed on the support block. A limiting groove is formed at the top of the upright plate, and a portion of the condenser 23 is located within the limiting groove. At least a portion of the mounting cavity is located within the support block, which provides space for the mounting cavity. The upright plate increases the height of the condenser 23 while reducing the space occupied by the protrusion 15 within the groove, thus facilitating the installation of other components.

[0056] In this embodiment, the protrusion 15 is integrally formed with the base 10 to reduce the number of parts, simplify assembly, and lower costs. In other embodiments, the protrusion 15 can be fixed to the base 10 by screws or snap-fit.

[0057] Since the compressor drive board assembly 40 needs to be electrically connected to the compressor 21 to control the start and stop of the compressor 21, a compressor fixing position is provided in the tank. The compressor fixing position is used to install the compressor 21. The compressor fixing position is located on one side of the protrusion 15 to reduce the distance between the compressor 21 and the mounting cavity, shorten the wiring harness length between the compressor 21 and the compressor drive board assembly 40, and optimize the arrangement of structural components in the tank.

[0058] In this embodiment, the heat pump dishwasher also includes a main control board assembly 30, which is electrically connected to the compressor drive board assembly 40. The main control board assembly 30 supplies power to the compressor drive board assembly 40, and there is signal transmission between the compressor drive board assembly 40 and the compressor 21 to control the start and stop of the compressor 21. The main control board assembly 30 can be a commonly used main control board in dishwashers. By adding the compressor drive board assembly 40 to control the compressor 21, the main control board assembly 30 can be the same as that in a conventional dishwasher. In other words, the main control board assembly 30 in this embodiment can be the same as the main control board assembly 30 in a dishwasher without the heat pump assembly 20, thereby reducing changes to the traditional dishwasher structure and lowering costs.

[0059] The heat pump dishwasher also includes a power supply harness and a communication harness. The power supply harness connects the main control board assembly 30 and the compressor drive board assembly 40, and the communication harness connects the compressor drive board assembly 40 and the compressor 21.

[0060] To facilitate wiring harness connection, the protrusion 15 is provided with a cable outlet 151, through which communication and power supply cables pass. By providing the cable outlet 151, the compressor drive board assembly 40 inside the mounting cavity can be connected to the main control board assembly 30 and compressor 21 outside the mounting cavity, and the wiring harness can be arranged in a certain pattern for easy maintenance.

[0061] In the prior art, due to the limited internal space of the base 10, the thickness of the machine door is generally increased, and the main control board assembly 30 is installed inside the machine door, resulting in a non-compact structure and complex wiring harness connection between the main control board assembly 30 and the compressor drive board assembly 40.

[0062] To solve the above problems, a main control mounting position is provided on the base 10, and the main control board assembly 30 is installed in the main control mounting position to shorten the distance between the main control board assembly 30 and the compressor drive board assembly 40, thereby reducing the difficulty of electrical connection between the two.

[0063] In this embodiment, the main control mounting position is located on the side of the base 10. The main control board assembly 30 is installed using the side space of the base 10 without occupying the space inside the slot, thereby reducing the impact on the installation space of the internal structural components of the base 10. Specifically, a side plate 13 of the base 10 is recessed to form the main control mounting position, and the main control board assembly 30 is fixed on the side plate 13.

[0064] Optionally, the main control mounting position is a slot structure with openings on the top and the side opposite to the slot in the left and right directions. The main control board assembly 30 can be set vertically and installed into the main control mounting position from the top to make full use of the thickness and height of the side plate 13.

[0065] To reduce the length of the power supply and communication wiring harnesses, the mounting cavity is located between the compressor mounting position and the main control mounting position. That is, the compressor 21 and the main control board assembly 30 are located on opposite sides of the protrusion 15, so that the compressor 21 and the main control board assembly 30 are both set close to the protrusion 15, thereby shortening the distance between the compressor drive board assembly 40 and the compressor 21, and shortening the distance between the compressor drive board assembly 40 and the main control board assembly 30.

[0066] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A base for a heat pump dishwasher, the heat pump dishwasher comprising an electrically connected compressor (21) and a compressor drive board assembly (40), characterized in that, The base forms a groove with a top opening. A portion of the base wall panel is provided with a protrusion (15) facing the interior of the groove. An installation cavity is formed in the protrusion (15). The installation cavity extends to the outer wall of the base to form an opening (141). The groove is used to install the compressor (21). The compressor drive plate assembly (40) can be inserted into the installation cavity through the opening (141).

2. The base according to claim 1, characterized in that, The opening (141) is located on the circumferential outer wall of the base.

3. The base according to claim 2, characterized in that, The outer wall of the base with the opening (141) is provided with a fixing part, which is detachably connected to the compressor drive plate assembly (40). And / or, the opening (141) is located on the rear sidewall of the base.

4. The base according to claim 1, characterized in that, The inner wall of the mounting cavity is provided with a limiting rib (152), which can abut against the compressor drive plate assembly (40) so that a portion of the inner wall of the mounting cavity is spaced apart from the compressor drive plate assembly (40).

5. The base according to claim 4, characterized in that, The top surface of the mounting cavity is provided with the limiting rib (152); The dimensions of the mounting cavity in the left-right direction are adapted to the dimensions of the compressor drive board assembly (40) in the left-right direction.

6. The base according to any one of claims 1-5, characterized in that, The heat pump dishwasher also includes a condenser (23) which is connected to the compressor (21). The protrusion (15) forms a condenser mounting base for supporting the condenser (23).

7. The base according to any one of claims 1-5, characterized in that, The tank is provided with a compressor mounting position, which is located on one side of the protrusion (15) and is used to install the compressor (21).

8. The base according to any one of claims 1-5, characterized in that, The base is provided with a cable outlet (151), which connects the mounting cavity and the inside of the groove. The base is provided with a main control mounting position, which is used to install the main control board assembly (30). The heat pump dishwasher also includes a power supply harness and a communication harness. The power supply harness connects the main control board assembly (30) and the compressor drive board assembly (40). The communication harness connects the compressor drive board assembly (40) and the compressor (21). Both the power supply harness and the communication harness pass through the outlet (151).

9. The base according to claim 8, characterized in that, The base is provided with a compressor mounting position, which is used to install the compressor (21). The mounting cavity is located between the compressor mounting position and the main control mounting position. And / or, the main control mounting position is located on the side of the base.

10. A heat pump dishwasher, characterized in that, include: A heat pump assembly (20), the heat pump assembly (20) including a compressor (21); The compressor drive board assembly (40) is electrically connected to the compressor (21); The base as described in any one of claims 1-9, wherein the compressor drive plate assembly (40) is disposed within the mounting cavity, and the compressor (21) is disposed within the slot.

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