Heat pump valve unit, heat pump and structure

Abstract

The invention relates to a heat pump valve unit (VE) having a housing (G) which is designed in the form of an extruded profile having a plurality of cavities (10, 14) which are formed in an extrusion direction during the extrusion of the profile. One of the cavities is designed to receive an actuating body (HS) of a reversing valve (4) and the actuating body (HS) can be operated in a first or second position in this cavity. The invention further relates to a heat pump and to a structure.

Description

[0001] 202401140

[0002] 1

[0003] Description

[0004] Heat pump valve unit, heat pump and building

[0005] The present invention relates to a heat pump valve unit, a heat pump with such a heat pump valve unit and a building with such a heat pump.

[0006] Heat pumps are used, among other things, for heating or cooling buildings, for example in the form of a so-called air-to-water heat pump.

[0007] The object of the present invention is to improve such a heat pump.

[0008] This problem is solved by a heat pump valve unit proposed and protected according to claim 1.

[0009] By providing the housing of this heat pump valve unit - as proposed - in the form of an extruded profile, a large part of its shaping can already be achieved through extrusion.

[0010] This advantageously allows for the elimination of numerous processing steps in relation to such a housing, thereby significantly reducing manufacturing costs for such a housing or heat pump valve unit.

[0011] The surfaces of the cavities produced by extrusion are sufficiently smooth and generally require no further processing. The extruded housing profile has no pores that could lead to leaks. Therefore, the surfaces of the cavities produced by extrusion are hermetically sealed. 202401140

[0012] 2

[0013] In addition, the proposed housing solution provides a highly compact heat pump valve unit that can accommodate a large number of components.

[0014] In one embodiment, further cavities are provided – formed during the extrusion of the housing profile – in the extrusion direction, which function as pressure control channels of the housing, in order to operate the actuating element of the reversing valve purely fluidically in the first or second position.

[0015] In another embodiment, at least one further cavity formed in the extrusion direction during the extrusion of the housing profile is provided not for receiving and guiding a refrigerant, but for mounting the heat pump valve unit and / or for saving material and thus weight and / or for receiving at least one electrical cable or electrical line or electrical wiring harness.

[0016] A wiring harness is, as is well known, a bundled collection of electrical wires or cables that transmit signals or power. These wires can be held together by cable ties, clamps, and / or sheathing.

[0017] In another embodiment, the actuator of the reversing valve has two piston-like sections which divide the associated cavity of the housing into a total of three sections.

[0018] In an alternative design, the actuator of the reversing valve has four piston-like sections which divide the associated cavity of the housing into a total of five sections.

[0019] It is proposed to form or provide cavities in the housing transverse to the extrusion direction of the housing profile – manufactured after the extrusion of the housing profile – which accommodate the connections of the reversing- 202401140

[0020] 3 valves (out)form and also serve to accommodate lines for the individual inlets and outlets of the reversing valve.

[0021] In another version, this housing features:

[0022] • a high-pressure inlet or high-pressure inlet duct section for a compressed refrigerant,

[0023] • a low-pressure drain or low-pressure drain channel section for an evaporated refrigerant,

[0024] • a separate inlet or inlet channel section from or outlet or outlet channel section to a first, outer heat exchanger and

[0025] • a separate inlet or inlet channel section from or outlet or outlet channel section to a second, internal heat exchanger.

[0026] All or at least some of these inlets or inlet channel sections and outlets or outlet channel sections can be provided by such a cavity perpendicular to the extrusion direction of the housing profile.

[0027] In another embodiment, this housing has a reversing valve in the form of a 4 / 2-way valve, the connections of which are formed by these individual inlets or inlet channel sections and outlets or outlet channel sections, and via whose actuator the high-pressure inlet or high-pressure inlet channel section can be selectively connected to one of the outlet channel sections to the respective heat exchanger, and the low-pressure outlet or low-pressure outlet channel section can be connected to the inlet channel section of the respective other heat exchanger.

[0028] Furthermore, it is proposed to form or provide cavities in the housing transverse to the extrusion direction of the housing profile – manufactured after the extrusion of the housing profile – which function as pressure control channels for the housing and communicate fluidically with corresponding pressure control channels in the extrusion direction of the housing profile. 202401140

[0029] 4

[0030] Furthermore, it is proposed to form or provide a cavity for a pilot valve in the housing transverse to the extrusion direction of the housing profile - manufactured after the extrusion of the housing profile - into which an electrically adjustable actuator of the pilot valve is inserted, via which the actuator of the reversing valve can be operated purely fluidically in the first or second position via its piston-like sections.

[0031] Furthermore, it is proposed to form or provide at least one cavity in the housing transverse to the extrusion direction of the housing profile - manufactured after the extrusion of the housing profile - through which an additional component is accommodated by the housing.

[0032] The housing may contain at least one pressure and / or temperature sensor and / or a pressure switch for interrupting and restoring a compressor's power supply and / or at least one service valve - for filling or emptying a refrigerant circuit - through an associated cavity, perpendicular to the extrusion direction of the housing profile.

[0033] Furthermore, a heat pump with a heat pump valve unit of the type described above is proposed, which can be operated in a heating mode or cooling mode.

[0034] Furthermore, a building with such a heat pump is proposed.

[0035] It is also proposed to use an extruded profile with a multitude of cavities formed during the extrusion of the profile in one extrusion direction as a housing for a heat pump valve unit of the type described above.

[0036] Furthermore, the use of a heat pump of the type described above for heating or cooling a building is proposed. 202401140

[0037] 5

[0038] The invention will now be explained in detail with reference to the figures. Further advantageous embodiments of the invention will become apparent from the dependent claims and the subsequent description of preferred embodiments. These are shown, partly schematically:

[0039] Fig. 1 shows a heat pump system with a valve unit according to the invention,

[0040] Fig. 2 shows an embodiment of a housing of the valve unit according to the invention,

[0041] Fig. 3 shows an embodiment of the valve unit according to the invention,

[0042] Fig. 4 shows another view of the valve unit shown in Fig. 3,

[0043] Fig. 5 shows another view of the valve unit shown in Fig. 3,

[0044] Fig. 6 shows another view of the valve unit shown in Fig. 3,

[0045] Fig. 7 shows different embodiments of a housing according to the invention, which has a partially flat sliding surface.

[0046] Fig. 8 shows a further embodiment of the valve unit according to the invention,

[0047] Fig. 9 shows a separate representation of the main actuating body of the associated reversing valve shown in Fig. 8,

[0048] Fig. 10 shows an actuator of a pilot valve,

[0049] Fig. 11 shows the valve unit shown in Fig. 8 in a further view and

[0050] Fig. 12 shows the valve unit shown in Fig. 8 in another view. 202401140

[0051] 6

[0052] The heat pump 2 illustrated in Fig. 1 - one can also speak of a heat pump system - has a heat pump valve unit VE with a housing G, which is fluidically connected via an associated refrigerant line to a refrigerant collector 8 - also called a collection tank or simply collector or accumulator - which functions as a low-pressure source - and via an associated refrigerant line to a compressor 6 - which functions as a high-pressure source.

[0053] These associated refrigerant lines between the individual components of the heat pump 2, shown in Fig. 1, are lines or line sections in the form of hoses and / or pipes and / or channels or cavities of objects.

[0054] The housing G contains various components. Specifically, these include a so-called reversing valve 4 in the form of a multi-way valve or 4 / 2-way valve, via which a refrigerant circuit underlying the heat pump 2 can be operated in a heating or cooling mode – depending on the position of an actuator of the reversing valve 4.

[0055] At this point, it is clarified that the spelling used for terms with parentheses, such as refrigerant circuit, is intended to cover possible variations or alternative terms that, as such, describe the same thing (e.g., Refrigerant circuit (refrigerant cycle).

[0056] A high-pressure inlet channel section D (D = Discharge) of the housing G, connected to the compressor 6, leads to the reversing valve 4 and carries a compressed refrigerant. A low-pressure outlet channel section S (S = Suction) of the housing G, connected to the refrigerant receiver 8, leads away from the reversing valve 4 and carries a vaporized refrigerant.

[0057] The housing G also has an inlet channel section from or outlet channel section to a first or outer heat exchanger Wa, as well as an inlet channel section from or outlet channel section to a second or inner heat exchanger 202401140

[0058] 7

[0059] Heat exchanger Wi, whereby these two heat exchangers Wa, Wi are not shown individually here or in Fig. 1.

[0060] These channels or channel sections of the housing G are cavities of the housing G, which form the connections of the reversing valve and of which at least one is formed transversely and, for example, orthogonally to a longitudinal extension of the housing G within the housing G.

[0061] The term "transverse" can be understood as an orientation relative to the longitudinal extension, which does not necessarily include a right angle, but can instead also form an acute or obtuse angle.

[0062] The heat exchanger Wa represents a thermal connection or interface to an environment, whereas the heat exchanger Wi represents a thermal connection or interface to at least one space, which as such can be heated by means of the heat pump 2 (Wa = evaporator;

[0063] Wi = condenser) or to cool (Wa = condenser; Wi = evaporator).

[0064] The housing G also incorporates a so-called pilot valve (not shown in Fig. 1), which is electrically actuated and whose actuator can assume either a first or second position. The actuator of the reversing valve 4 can be operated in a first or second position via this pilot valve.

[0065] The housing G also accommodates - as shown in Fig. 1 - a pressure and temperature sensor PT connected to the high-pressure inlet D, a pressure and temperature sensor PT connected to the low-pressure outlet S, a pressure switch DS connected to the high-pressure inlet D, a service valve SV connected to the high-pressure inlet D and a service valve SV connected to the low-pressure outlet S.

[0066] The refrigerant circuit can be filled or emptied via the two service valves SV. A voltage can be applied via the pressure switch DS, if necessary. 202401140

[0067] 8

[0068] Temporarily interrupt and then restore the supply to compressor 6.

[0069] Fig. 2 illustrates - for the sake of simplicity - only the proposed housing G in one embodiment and in the form of a so-called extruded profile with a plurality of - during extrusion of the profile - in an extrusion direction X - X with formed cavities that carry the refrigerant.

[0070] The diagram shows a closed, circumferential cavity 10 for receiving the actuator of the reversing valve. This actuator can also be referred to as the main actuator. Within this cavity 10, this main actuator can be adjusted along this cavity 10, or in an X - X direction, to the first or second position of the reversing valve.

[0071] This cavity 10, extending in the X-X direction, is cylindrically expanded at both ends by machining after the extrusion of the profile. These two cylindrical expansions, which function as piston surfaces, extend to a flat sliding surface 16 of the cavity 10, with which the main actuating element interacts section by section and which forms a flat valve seat for the main actuating element.

[0072] Above cavity 10, a closed cavity 12 can be seen, which functions as a measuring chamber and into which the pressure and temperature sensor PT, connected to the high-pressure inlet D, extends for monitoring purposes.

[0073] Also visible are a number of so-called closed, circumferential pressure control channels 14, also called capillaries, which – depending on the position of the actuator of the pilot valve – connect the high-pressure inlet D with one of these end regions of the cavity 10 and the low-pressure outlet S with the other end region of the cavity 10, or vice versa. 202401140

[0074] 9

[0075] Also visible is a so-called mounting groove or a cavity 18 open to the surroundings, which is also formed as such – during the extrusion of the profile – in the extrusion direction X - X. This mounting groove 18 also contributes to the weight saving with regard to the housing G.

[0076] All these – during the extrusion of the profile – in the extrusion direction X – X with formed cavities contribute to a significant reduction in the number of machining or manufacturing steps required for such a housing G, and thus also to a significant reduction in costs associated with such manufacturing.

[0077] The surfaces of all these cavities produced in this process are advantageously sufficiently smooth and therefore generally require no further processing. Only cavity 10 is subsequently widened cylindrically at both ends to fully accommodate the actuator of the reversing valve.

[0078] All cavities shown perpendicular to the extrusion direction X - X or in the direction Y - Y, of which, for example, a cavity 20 for the high-pressure inlet D and the two cavities 22, 24 (for the pressure switch DS on the one hand and one of the pressure and temperature sensors PT on the other) can be seen, are each subsequently produced by machining after extrusion of the profile.

[0079] Fig. 3 illustrates a first embodiment of the proposed heat pump valve unit VE. The housing G is shown, containing a multitude of components mentioned above.

[0080] In addition to the main actuator HS or the actuator of the reversing valve or 4 / 2-way valve, which is received in cavity 10 in the extrusion direction of the housing profile, the housing G also receives the following components transversely to the extrusion direction of the housing profile: 202401140

[0081] 10

[0082] A pressure switch DS projecting into the cavity or measuring chamber 12, a pressure and temperature sensor PT projecting into the cavity or measuring chamber 12, a pressure and temperature sensor PT projecting into the low-pressure drain S, and a pilot valve PV whose lifting magnet HM, beyond which the actuating element of the pilot valve PV can be electrically actuated or adjusted, protrudes from the housing G.

[0083] The pressure switch DS, the two pressure and temperature sensors PT and the service valves SV mentioned at the beginning in conjunction with Fig. 1 can be installed accordingly via an associated thread in the housing.

[0084] Furthermore, the following are also incorporated through the housing G and perpendicular to the extrusion direction of the housing profile:

[0085] A pipe or hose section of the high-pressure inlet D, a pipe or hose section of the low-pressure outlet S, a pipe or hose section serving as an inlet to or outlet for the outer heat exchanger Wa, and a pipe or hose section serving as an inlet to or outlet for the inner heat exchanger Wi.

[0086] Figure 3 illustrates the main actuator HS in one of two possible positions, in which the high-pressure inlet D is connected to the outlet to the inner heat exchanger Wi, and in which the low-pressure outlet S is connected to the inlet of the outer heat exchanger Wa. Arrow lines in Figure 3 illustrate the two resulting flow paths of the conveyed refrigerant.

[0087] Accordingly, Fig. 3 illustrates a heating mode of the heat pump 2 shown in Fig. 1.

[0088] The main actuating element HS is designed in the form of a narrow, sectionally stamped sheet metal strip 30, which is bent at its two ends in two opposite directions. At these two 202401140

[0089] At each of the 11 curved ends, a piston-like, multi-part section 34 is attached or provided, which, in the sense of a pressurizable piston, seals against the previously described associated cylindrical section of the cavity 10. These two piston-like sections 34 divide the cavity 10 into a total of three sections. The main section of this cavity 10, located between these two piston-like sections 34, is constant with respect to its length and volume. Only its position relative to the housing G is variable (see, for example, Fig. 3 and Fig. 5).

[0090] This main section of cavity 10 is always connected to the high-pressure inlet D and to one of the outlets to the outer or inner heat exchanger Wa, Wi. Therefore, this main section of cavity 10 forms a so-called high-pressure section or high-pressure chamber section. Compressed refrigerant flowing into the housing G via this high-pressure inlet D also enters the aforementioned cavity or measuring chamber 12, into which the pressure switch DS and one of the two pressure and temperature sensors PT extend or protrude.

[0091] The section to the left and the section to the right of this main section of cavity 10 each represent a secondary section of cavity 10 in the sense of a control chamber, via which the main actuating body HS can be deflected accordingly.

[0092] However, these latter sections vary in length and volume depending on the position of the pilot valve actuator.

[0093] In Fig. 3, this main actuating body HS is deflected to the left against a stop, whereas in Fig. 5, this main actuating body HS is deflected to the right against a stop.

[0094] The pressures that arise or act in these secondary sections of cavity 10 generate an actuating force or displacement force acting on the main actuating element HS, which causes the corresponding deflection. And during such a deflection of the main actuating element HS, the high-pressure- 202401140

[0095] The secondary section of cavity 10, connected to inlet D, is filled with compressed refrigerant, while the secondary section of cavity 10 connected to the low-pressure outlet S, which was previously filled with compressed refrigerant, is emptied. The resulting actuating force or displacement force is proportional to the differential pressure between these two secondary sections of cavity 10.

[0096] A sliding and deflecting element 32, also called a canoe, is inserted into a stamped, central cutout in the sheet metal strip 30. This element is, for example, injection-molded from a plastic material and rests on the sliding surface 16 (see, for example, Fig. 2) and seals against this sliding surface 16. It is movable between a first and second position, or between the aforementioned first and second positions of the main actuating element HS. This sliding and deflecting element, or canoe 32, is inserted into the central cutout of the sheet metal strip 30 from below, as shown in Fig. 3. The refrigerant is received, guided, and deflected by this canoe 32. The lower section of the canoe 32 also acts as a sealing element against the flat sliding surface 16, along which this sliding and deflecting element, or canoe 32, can be adjusted or moved.

[0097] The individual cavities running in the extrusion direction X - X and carrying the refrigerant are sealed at both ends of the housing G with an associated cover, sealing against the environment. Additionally, individual cavities can also be closed with pin-like sealing elements, thus sealing against the environment.

[0098] Figure 4 shows the pressure control channels or capillaries 14 running in the extrusion direction X-X, which communicate with pressure control channels or capillaries 16 formed transversely to them or in the Y-Y direction (but not shown) (cf. the pressure control channels 16 in Figure 2), depending on the position of the actuator of the pilot valve (also not shown). Figure 4 also shows the solenoid HM, which has at least 202401140

[0099] 13 is arranged section by section outside the housing G and actuates or adjusts this actuator of the pilot valve.

[0100] The pressure control channels or capillaries 14, which are shaped in the Y-Y direction, are also sealed against the environment with individual pin-like sealing elements.

[0101] In Fig. 5, the main actuating body HS is deflected to the right against a stop.

[0102] Fig. 6 illustrates the proposed heat pump valve unit VE in a further view, in which the pilot valve PV with the lifting magnet HM is shown or indicated.

[0103] Fig. 7 illustrates two different embodiments of housings G – each in two different sectional views, whose cavity 10 has the previously described flat sliding surface 16 in sections. In two of these sectional views, in addition to the pressure control channels or pressure channel sections 14 extending in the extrusion direction X-X, pressure control channels or pressure channel sections 16 extending or formed transversely to the extrusion direction X-X or in the Y-Y direction can also be seen, which communicate fluidically with associated pressure control channels 14 extending in the extrusion direction X-X. These communicating pressure control channels 14 and 16 are connected – depending on the position of the actuator of the pilot valve PV – to the high-pressure inlet D or the low-pressure outlet S in order to effect the previously described deflections of the main actuator HS.

[0104] While in Fig. 7 the first and second illustrations from the left relate to a first embodiment of a housing G according to the invention and show it in two different sections or sectional views, the third and fourth illustrations from the left relate to a further or second embodiment of a housing according to the invention in two different sections or sectional views. The housing G can be viewed in the extrusion direction X - X next to closed 202401140

[0105] 14 cavities Kg also have cavities Ko open to the environment which as such do not absorb and carry refrigerant.

[0106] The cavity Ko, shown in the first and second images from the left in Fig. 7 and open to the surroundings, serves to attach the housing G to a housing receptacle, which is not shown as such. It also contributes to saving material and thus weight.

[0107] The design according to the third and fourth illustrations from the left - in Fig. 7 - comprises at least one enclosed cavity Kg, which as such does not carry any refrigerant, but is merely intended to save material and thus weight.

[0108] Furthermore, it is proposed to provide at least one such cavity Ko, open to the surroundings, to accommodate at least one electrical cable or even an electrical wiring harness.

[0109] The second embodiment of the heat pump valve unit VE illustrated in Fig. 8 has a housing G with a completely or continuously cylindrical cavity 10 in which a completely cylindrical main actuating element HS in the sense of a piston is received.

[0110] In this design, all connections of the reversing valve 4 or all inlets and outlets of the proposed heat pump valve unit VE are formed on one side of the housing G and communicate with the cavity 10.

[0111] The main actuating body HS has sectionally formed, closed, circumferential, piston-like projection sections 40, which function as individual piston sections and interact sealingly with the cavity 10. Each of these projection sections 40 has a circumferentially running, closed groove into which a radially spring-loaded, closed, circumferential sealing element (not shown) is inserted. 202401140

[0112] 15

[0113] In this process, the main actuating body HS – by means of these projecting sections or piston sections 40 – forms three separate sections of the cavity 10 along its length, which are unchanging with respect to their length and volume. Only their position relative to the housing G is variable. These three sections represent the main sections of the cavity 10.

[0114] Overall, this main control element HS divides the cavity 10 into five sections, with a further section of the cavity 10 being formed to the right and left of the main control element HS. However, the length and volume of these latter two sections are variable and depend on the position of the pilot control element PS.

[0115] The section of cavity 10 to the left of this main actuating element HS, as well as the section of cavity 10 to the right of this main actuating element HS, each constitute a secondary section of cavity 10 in the sense of a control chamber, via which this main actuating element HS can be deflected accordingly. In Figures 8 and 11, this main actuating element HS is deflected to the right against a stop, whereas in Figure 12, this main actuating element HS is deflected to the left against a stop.

[0116] Fig. 9 shows the main actuating element HS according to Fig. 8, which is hollow or shaped like a hollow piston. The two outer sections and the third section of this main actuating element HS communicate with each other via the associated opening 42, 44 and the channel 46 between them.

[0117] Fig. 10 shows the pilot actuator PS according to Fig. 8, which is also hollow or shaped in the form of a hollow piston. This pilot actuator PS has sectionally formed, closed, circumferential, piston-like projection sections 50, which function as individual piston sections that interact sealingly with an associated cavity – transverse to the extrusion direction of the housing profile. These projection sections 50 202401140

[0118] 16 each have a closed circumferential groove in which a radially spring-loaded, closed circumferential sealing element is inserted.

[0119] The inner channel formed by this hollow body or pilot body PS lies between the two visible openings 52, 54.

[0120] In Fig. 11, this main actuating body HS is deflected to the right against a stop, whereas in Fig. 12, this main actuating body HS is deflected to the left against a stop.

[0121] In Figures 8, 11, and 12, the cavity 10 is sealed or closed off at both ends of the housing G by an associated cover. The pressure control channels or capillaries formed in the extrusion direction X-X and transversely thereto or in the Y-Y direction are sealed off from the environment by individual pin-like sealing elements.

[0122] The aforementioned locking elements can be either screw plugs or deep-drawn cups. The former can be screwed into a corresponding thread in the housing G, and the latter can be welded to the housing G.

[0123] According to the second embodiment, the two outer main sections of the cavity 10, which are formed by the individual piston-like sections 40, communicate with each other via the channel 46 of the hollow main control element HS. Furthermore, this main control element HS guides the conveyed refrigerant section by section over the shell and end faces assigned to the individual main sections of the cavity 10 (Fig. 9).

[0124] Referring to Figures 11 and 12, the advantage of such a main actuating element HS becomes clear, because a pressure equalization (principle of pressure balance) exists along the main actuating element HS. Therefore, only small adjusting forces are required to move or deflect the main actuating element HS into the aforementioned first or second position. 202401140

[0125] 17

[0126] The hollow actuator of the pilot valve PV guides the conveyed refrigerant through channel 54 and section by section over the associated shell and end faces (Fig. 10). The individual projection sections or piston sections 50 divide the associated cavity into two separate sections, which are fixed in length and volume. Only their position relative to the housing G is variable by the solenoid HM.

[0127] Although the preceding description explains exemplary embodiments, it should be noted that a multitude of variations are possible. Furthermore, it should be emphasized that the exemplary embodiments are merely examples and are not intended to restrict the scope of protection, applications, or structure in any way. Rather, the preceding description provides the skilled person with a guideline for implementing at least one exemplary embodiment, whereby various modifications, particularly with regard to the function and arrangement of the described components, can be made without departing from the scope of protection as defined by the claims and these equivalent combinations of features.

Claims

202401140 18 Patent claims 1. Heat pump valve unit (VE) with a housing (G) in the form of an extruded profile with a plurality of cavities (10, 14) formed during the extrusion of the profile in one extrusion direction, one of which is formed to accommodate an actuating element (HS) of a reversing valve (4) and in which the actuating element (HS) can be operated in a first or second position.

2. Heat pump valve unit (VE) according to claim 1, wherein further cavities are provided in the housing (G) during the extrusion of the profile in the extrusion direction - in the sense of pressure control channels (14) - to operate the actuating element (HS) of the reversing valve (4) purely fluidically in the first or second position.

3. Heat pump valve unit (VE) according to claim 1 or 2, wherein at least one further cavity formed in the extrusion direction during the extrusion of the profile is not provided for receiving and guiding a refrigerant, but for mounting the heat pump valve unit (VE) and / or for saving material and thus weight and / or for receiving at least one electrical cable or electrical wiring harness.

4. Heat pump valve unit (VE) according to one of the preceding claims, wherein the actuator (HS) of the reversing valve (4) has two piston-like sections (34) which divide the associated cavity (10) of the housing (G) into a total of three sections.

5. Heat pump valve unit (VE) according to any one of the preceding claims 1 to 4, wherein the actuator (HS) of the reversing valve (4) has four piston-like sections (40) which divide the associated cavity (10) of the housing (G) into a total of five sections. 202401140 19 6. Heat pump valve unit (VE) according to one of the preceding claims, wherein cavities are formed in the housing (G) transversely to the extrusion direction of the housing profile - produced after extrusion of the housing profile - which form the connections of the reversing valve (4) and also serve to accommodate lines for the individual inlets and outlets of the reversing valve (4).

7. Heat pump valve unit (VE) according to one of the preceding claims, wherein the housing (G) has a high-pressure inlet channel section (D) for a compressed refrigerant, a low-pressure outlet channel section (S) for an evaporated refrigerant, a separate inlet channel section from or outlet channel section to a first, outer heat exchanger (Wa) and a separate inlet channel section from or outlet channel section to a second, inner heat exchanger (Wi).

8. Heat pump valve unit (VE) according to claim 7, wherein the housing (G) has a reversing valve (4) in the form of a 4 / 2-way valve, the connections of which are formed by these individual inlet channel sections and outlet channel sections and via whose actuating element (HS) on the one hand the high pressure inlet channel section (D) can be selectively connected to one of the outlet channel sections to the respective heat exchanger (Wa, Wi) and on the other hand the low pressure outlet channel section (S) can be connected to the inlet channel section of the respective other heat exchanger (Wa, Wi).

9. Heat pump valve unit (VE) according to one of the preceding claims, wherein cavities are formed in the housing (G) transversely to the extrusion direction of the housing profile - produced after extrusion of the housing profile - which function as pressure control channels (14) of the housing (G) and communicate with associated pressure control channels (14) in the extrusion direction of the housing profile. 202401140 20 10. Heat pump valve unit (VE) according to one of the preceding claims, wherein a cavity for a pilot valve (PV) is formed in the housing (G) transversely to the extrusion direction of the housing profile - manufactured after extrusion of the housing profile - into which an electrically adjustable actuating element of the pilot valve (PV) is inserted, by means of which the actuating element (HS) of the reversing valve (4) can be operated purely fluidically in the first or second position via its piston-like sections (40).

11. Heat pump valve unit (VE) according to one of the preceding claims, wherein at least one cavity - produced after extrusion of the housing profile - is formed in the housing (G) transversely to the extrusion direction of the housing profile, through which an additional component is received by the housing (G).

12. Heat pump valve unit (VE) according to claim 11, wherein at least one pressure and / or temperature sensor and / or a pressure switch for interrupting and restoring a power supply to a compressor and / or at least one service valve - for filling or emptying a refrigerant circuit - is / are accommodated by the housing (G) transversely to the extrusion direction of the housing profile through an associated cavity.

13. Heat pump with a heat pump valve unit (VE) according to one of the preceding claims, which can be operated in a heating mode or cooling mode.

14. Building with a heat pump according to claim 13.

15. Use of an extruded profile with a plurality of cavities (10, 14) formed during the extrusion of the profile in one extrusion direction as a housing (G) for a heat pump valve unit (VE) according to any one of the preceding claims 1 to 12. 202401140 21 16. Use of a heat pump (2) according to claim 13 for heating or Cooling a building.

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