Valve device for a heat pump system, heat pump system with such a valve device, and buildings with such a valve device or such a heat pump system

Abstract

Valve device (3a) for a heat pump system (2), comprising - a valve device housing (3b), - an electric actuator (10), - a first valve body (102) for controlling or regulating a first fluid flow, wherein the first valve body (102) is adjustable by the electric actuator (10), and - a second valve body (222) for controlling or regulating a second fluid flow, wherein the second valve body (222) is adjustable by the first fluid flow, wherein the electrical actuator (10) is arranged in or on the valve device housing (3b), wherein the first valve body (102) and the second valve body (222) are arranged in the valve device housing (3b), characterized in that the valve device (3a) has at least one pressure sensor (14) or one temperature sensor (13) and that the valve device housing (3b) has openings which serve to form fluid channels or connecting channels within the valve device housing (3b), wherein at least one of the openings is closed by one of the sensors (13, 14).

Description

Technical field

[0001] The invention relates to a valve device for a heat pump system and to a heat pump system with such a valve device. Furthermore, the invention relates to a building with such a valve device or such a heat pump system. State of the art

[0002] EP 1 970 648 A2 shows a heat pump system with several valve devices.

[0003] Publication EP 2 949 978 A1 discloses a two-stage pilot solenoid valve.

[0004] Document DE 601 00 677 T2 discloses a hydraulic system with a seat valve.

[0005] Publication US 5,913,577 A discloses an electro-hydraulic control valve.

[0006] Publication WO 2015 / 166628 A1 discloses a control valve.

[0007] A particular disadvantage of the devices in the prior art is that they are relatively large and distributed throughout the entire heat pump system. Description of the invention, problem, solution, advantages

[0008] Therefore, the object of the present invention is to provide an alternative valve device which is characterized in particular by its compactness and preferably by its ease of manufacture. A further object is to provide a heat pump system with such a valve device. A further object is to provide a building with such a valve device or such a heat pump system.

[0009] The problem with regard to the valve device is solved by the object having the features of claim 1.

[0010] One embodiment of the invention relates to a valve device for a heat pump system, wherein the valve device comprises a valve housing, an electric actuator, a first valve body for controlling or regulating a first fluid flow, wherein the first valve body is adjustable by the electric actuator, and a second valve body for controlling or regulating a second fluid flow, wherein the second valve body is adjustable by the first fluid flow. Furthermore, the electric actuator is arranged in or on the valve housing, wherein the first valve body and the second valve body are arranged in the valve housing.

[0011] This creates a particularly compact and easy-to-manufacture valve device.

[0012] In the context of the invention(s), a fluid is to be understood as a liquid, a working fluid, and / or a refrigerant, and vice versa. Fluid tightness is thus to be understood as a tightness with respect to a liquid, a working fluid, and / or a refrigerant, and vice versa. Likewise, a fluid flow is to be understood as the flow rate of a liquid, a working fluid, and / or a refrigerant, and vice versa. Similarly, a fluid connection is to be understood as a connection for a liquid, a working fluid, and / or a refrigerant, and vice versa. Likewise, a fluid service connection is to be understood as a service connection for a liquid, a working fluid, and / or a refrigerant, and vice versa. Likewise, a fluid pressure is to be understood as a pressure, in particular a hydraulic pressure, of a liquid, a working fluid, and / or a refrigerant, and vice versa.Similarly, a fluid channel is understood to be a channel for a liquid, a working fluid, and / or a refrigerant, and vice versa. In particular, at least one end, preferably two ends, of at least one fluid channel leads out of the valve housing. Preferably, if the fluid channel or channels lead out of the valve housing, the end or ends of the fluid channel(s) open into a fluid connection. A connecting channel is understood to be a fluid channel that is located solely within the valve housing and / or is configured such that at least two fluid channels are fluidically connected to each other, at least two further connecting channels are fluidically connected to each other, or a further connecting channel and a fluid channel are fluidically connected to each other.

[0013] Basically, the adjustability of the first and / or second valve body refers to the ability to change the position or location of the first and / or second valve body, particularly in a receptacle or in each receptacle.

[0014] It is particularly advantageous if the fluid pressure of the first fluid flow is lower than the fluid pressure of the second fluid flow. This allows the first fluid flow to be controlled or regulated by the electric actuator with very little electrical energy, thereby enabling the second fluid flow to be controlled or regulated by the first. This requires less electrical energy than if the second fluid flow were controlled or regulated directly by an electric actuator.

[0015] It is particularly advantageous if the valve device is a multi-way valve device or a four-way valve device. In other words, the valve device has a multi-way valve or a four-way valve.

[0016] A preferred embodiment is characterized in that the valve housing is made of plastic and / or metal. While a plastic valve housing is easy to machine, cost-effective, and not prone to corrosion, a metal valve housing offers high strength at high pressures. It is also preferred if the valve housing is made of plastic but incorporates metal reinforcing elements, which improve its resistance to higher pressures at a relatively low cost. Preferably, if the valve housing is made of metal, it is made of aluminum.

[0017] Another preferred embodiment is characterized in that the valve device housing has fluid connections for the first and second fluid flows as well as fluid channels for the first and second fluid flows. In particular, the first and second fluid flows pass through the valve device.

[0018] It is particularly advantageous if the fluid connections, or at least one of the fluid connections, are designed as nozzles.

[0019] It is also advantageous if the nozzles are attached to the valve housing by means of a screw connection or are formed as one piece with the valve housing.

[0020] Another preferred embodiment is characterized in that at least a part or a predominant part of the valve housing, which has fluid channels or channels, is formed in one piece. This one-piece construction avoids complex assembly and reduces the number of components and connecting elements required, resulting in high strength. It is also particularly advantageous if the valve housing is formed in one piece.

[0021] Another preferred embodiment is characterized in that the electrical actuator is a linear actuator.

[0022] It is particularly advantageous if the electric actuator or linear actuator is designed as a solenoid actuator or cylindrical coil actuator. Such actuators feature, in particular, a cylindrical, current-carrying coil which, when energized, generates a magnetic field and thereby moves an armature, i.e., attracts or pushes it away. If the armature is coupled to a valve body, the valve body can be moved, i.e., adjusted. It is especially advantageous if the valve body forms the armature, i.e., if the valve body and armature are formed as a single unit.

[0023] It is also advantageous if the electric actuator or linear actuator is a spindle actuator. Spindle actuators typically include an electric drive motor, such as a mechanically commutated DC motor, an electrically commutated DC motor, or a stepper motor. The rotary motion of the electric drive motor is converted by means of a spindle into an axial, i.e., linear, motion that moves, or adjusts, the valve body.

[0024] Regardless of the type of electric actuator used, it is advantageous for the valve device to include a failsafe spring that moves the actuator and / or the first valve body into a position in the event of a malfunction of the actuator, protecting a heat pump system having such a valve device, or the valve device itself, from damage, in particular from damage caused by excessively high fluid pressures.

[0025] Another preferred embodiment is characterized in that the valve housing has a first mounting opening for the first valve body and / or that the valve housing has a second mounting opening for the second valve body. In other words, the respective valve body can be inserted into the valve housing through the corresponding mounting opening.

[0026] In the event that the valve device housing has only one mounting opening for the first valve body, this is not the first mounting opening, but merely a mounting opening.

[0027] In the event that the valve device housing has only one mounting opening for the second valve body, it is not the second mounting opening, but merely a mounting opening.

[0028] Furthermore, it is preferred if two mounting openings are provided for the first valve body and / or two mounting openings for the second valve body. These two mounting openings can each be part of a through-bore, a through-hole, or a penetration through the valve device housing.

[0029] It is advantageous if one, at least one, several, or all mounting openings are closed by one or more sealing devices, in particular in a fluid-tight manner. Threaded plugs are suitable as sealing devices, for example. A flange that is screwed to the valve body and closes a mounting opening, in particular in a fluid-tight manner, is also conceivable.

[0030] Another preferred embodiment is characterized in that the first and / or the second valve body is designed as a cylindrical valve.

[0031] It is particularly advantageous if the valve housing has separate receptacles for the first and second valve bodies or the first and second cylinder valves. Depending on the position of the first valve body in the first receptacle, the first fluid flow can be regulated or controlled. The position of the first valve body in the first receptacle can be changed by the electric actuator. Depending on the position of the second valve body in the second receptacle, the second fluid flow can be regulated or controlled. The position of the second valve body in the second receptacle can be changed by the second fluid flow or is at least dependent on it. In other words, the position of the second valve body in the second receptacle can be indirectly determined by means of the electric actuator.

[0032] It is also advantageous if the two receptacles run parallel to each other. It is also preferable if the two receptacles are fluidically connected to each other by means of at least one fluid channel and / or at least one connecting channel. Furthermore, it is advantageous if the valve bodies are arranged in their respective receptacles, in particular mounted to allow axial movement.

[0033] Furthermore, it is advantageous if the first and / or the second valve body, in particular the first and / or the second cylinder valve, is / are preferably mounted axially movable in the receptacle or in their respective receptacles by means of sealing rings.

[0034] It is also advantageous if the sealing rings are made of a plastic or an elastomer. This increases the sealing effect or improves the bearing. Furthermore, it is beneficial if each sealing ring is located in a groove at one of the end sections of the valve body, the cylinder valve, the valve bodies, or the cylinder valves.

[0035] Furthermore, it is advantageous if the sealing rings fluidically seal a fluid chamber, arranged axially between the sealing rings and bounded by the sealing rings, the valve body, and its receptacle, against the axially adjacent areas of the receptacle. This preferably applies to both valve bodies and their respective receptacles.

[0036] Furthermore, it is advantageous if the valve body(s), in particular in an area arranged axially between the sealing rings, has a section or sections which have at least one recess.

[0037] It is also advantageous if the at least one recess is designed such that, particularly depending on the axial position of the valve body within its receptacle, at least one fluid channel which is fluidically connected to the receptacle of the valve body and a connecting channel which is fluidically connected to the receptacle of the valve body can be fluidly connected to each other, that at least two fluid channels which are fluidically connected to the receptacle of the valve body can be fluidly connected to each other, and / or that at least two connecting channels which are fluidically connected to the receptacle of the valve body can be fluidly connected to each other.

[0038] It is also preferable if the valve body(s), in particular in an area arranged axially between the sealing rings, has or have a section through which the fluid connection or fluid connections that can be made through the recess can be fluidically interrupted wholly or partially, in particular depending on the position of the valve body within the receptacle of the valve body.

[0039] Furthermore, it is advantageous if the axial positions through which the fluidic connections can be established and interrupted differ from one another, i.e., are spaced apart from one another in the axial direction.

[0040] Furthermore, it is advantageous if one or the fluid channel that is fluidically connected to the valve body receptacle and one or the connecting channel that is fluidically connected to the valve body receptacle, and / or if two or the at least two fluid channels that are fluidically connected to the valve body receptacle, and / or if two or the at least two connecting channels that are fluidically connected to the valve body receptacle, are arranged offset from each other by 0° to 20°, by 80° to 100°, or by 170° to 190° in a plane that extends transversely, in particular perpendicularly, to the direction of extension of the receptacle. Various angular ranges with different types of channels can also be combined in all possible combinations.

[0041] Another preferred embodiment is characterized in that the valve device has at least six fluid connections, wherein the first two of the at least six fluid connections can be fluidically connected to a compressor, wherein the second two of the at least six fluid connections can be fluidically connected to a condenser and / or evaporator, and wherein the third two of the at least six fluid connections can be fluidically connected to a fluid storage device or directly connected to each other by means of a short-circuit line.This ensures compatibility with other components of a heat pump system, while the bypass line can consist of a pipe or fluid channel which, if no components of a heat pump system are connected to the third pair of fluid connections, directly connects one fluid connection of the third pair of fluid connections to the other fluid connection of the third pair of fluid connections. The fluid storage unit is, in particular, a fluid reservoir, preferably designed to temporarily store excess fluid from the heat circuit that is not required for operation.

[0042] It is particularly advantageous if the at least six fluid connections of the valve device are the fluid connections for the first and second fluid flows.

[0043] Furthermore, it is advisable that the at least six fluid connections are nozzles, i.e. connection nozzles.

[0044] The valve device has at least one pressure sensor or at least one temperature sensor. It is advantageous if the valve device instead has at least one temperature-pressure sensor, or at least one temperature sensor and at least one pressure sensor. The pressures and temperatures can be used to control or regulate the valve device, or, if a heat pump system has such a valve device, to control or regulate the heat pump system. Using the temperature-pressure sensor, the temperature and pressure of a fluid flow can be measured by a single sensor, thus requiring fewer sensors and simplifying installation.

[0045] It is advantageous to provide a pressure sensor and a temperature sensor, or alternatively a temperature-pressure sensor, for the first fluid flow. It is also advantageous to provide another pressure sensor and another temperature sensor, or alternatively another temperature-pressure sensor, for the second fluid flow. Alternatively, different sensor types and arrangements are possible for both fluid flows.

[0046] Furthermore, it is preferable for the pressure sensor, temperature sensor, or temperature-pressure sensor to be in fluidic contact with the respective fluid flow. This ensures a direct measurement of the respective fluid temperature or hydraulic fluid pressure.

[0047] Furthermore, it is advantageous for the temperature sensor, pressure sensor, and / or temperature-pressure sensor to be connected to the valve body via a screw connection. For this purpose, it is beneficial if the respective sensor has an external thread that engages with an internal thread of the valve body, thereby forming the screw connection. Advantageously, the internal threads of the valve body are formed by threaded inserts, which facilitates sensor replacement during maintenance. It is also conceivable that the sensors incorporate elastomer seals, thus preventing fluid from leaking out of the valve body.

[0048] Another preferred embodiment is characterized in that the valve device housing has at least one, preferably two, fluid service connection(s). This fluid service connection(s) is / are particularly useful for servicing the valve device or a heat pump system of which such a valve device is a part, by allowing the fluid in the valve device or heat pump system to be drained, extracted, filled, or replaced via the fluid service connection(s). In particular, the at least one or the two fluid service connections are provided in addition to the at least six fluid connections.

[0049] The valve housing has openings that serve to form fluid channels or connecting channels within the valve housing, with at least one of the openings being closed by one of the sensors. It is particularly advantageous if this sensor is at least one pressure sensor, at least one temperature sensor, or at least one temperature-pressure sensor.

[0050] In particular, the connecting channels connect at least two fluid channels to each other, at least two further connecting channels to each other, and / or one further connecting channel to a fluid channel. Alternatively, such an opening may lead into a fluid connection.

[0051] It is particularly advantageous if, in addition to the first variant, in addition to the first alternative, or as an alternative to the first variant, the mounting opening for the first valve body, or one of the mounting openings for the first valve body, is closed by the electric actuator, especially if it is fluid-tight. This eliminates the need for separate sealing devices that serve only to close these mounting openings.

[0052] It is particularly advantageous if at least one of the fluid channels opens fluidically into a fluid connection, which is designed in particular as a nozzle.

[0053] This eliminates the need for separate sealing devices that only serve to close these openings.

[0054] Another preferred embodiment is characterized in that the valve device comprises a control unit and / or an interface, in particular a data interface. Data that can be transmitted via the interface or data interface refers in particular to measurement signals from the sensors and / or control signals for the electrical actuator. It is particularly advantageous if the control unit is arranged in the valve device, on the valve device, or at a distance from the valve device.

[0055] It is particularly advantageous if the control unit is configured to perform a fault diagnosis of a heat pump system that has such a valve device, and / or of the valve device itself. Furthermore, it is preferred if the control unit is additionally or alternatively configured to execute a maintenance mode.

[0056] It is also advantageous if the control unit is additionally or alternatively designed to control or regulate a heat pump system which has such a valve device, and / or the valve device.

[0057] It is also preferable if the temperature sensors, pressure sensors, the electrical actuator and / or temperature-pressure sensors are connected to the control unit via signal transmission.

[0058] Furthermore, it is advantageous if the electric actuator can be regulated or controlled by the control unit and is also connected to the control unit via signal transmission.

[0059] Furthermore, it is advantageous if the control unit is located on or in the valve device housing.

[0060] It is also advantageous if the control unit is connected to the interface for signal transmission, whereby the error signals and / or measurement signals of the sensors, the electrical actuator or of a heat pump system, if such a system has such a valve device, can be output via the interface.

[0061] If the valve device only has an interface, i.e., no control unit (because the control unit is located, for example, outside the valve device but within a heat pump system that includes the valve device), the interface is connected to the electrical actuator and / or the sensors for signal transmission. In other words, the sensor measurement signals, such as pressure and / or temperature, can be read via the interface, and / or the electrical actuator can be controlled. Furthermore, it is preferred that, in this case, a control unit for the valve device or for a heat pump system that includes the valve device is connected to the interface for signal transmission.

[0062] In principle, the interface is either designed as a hardware interface, in particular a hardware data interface, for example as a female or male connector. Alternatively, it is conceivable that the interface is designed as a wireless interface, in particular a wireless data interface.

[0063] A preferred embodiment is characterized in that the valve device is integrated into an evaporator, a condenser, or a compressor. In other words, either an evaporator, a condenser, or a compressor incorporates the valve device. This results in even greater compactness.

[0064] In principle, within the scope of this invention or inventions, unless otherwise specified, a condenser is to be understood as an apparatus in which a substance can be converted from the gaseous state of matter to the liquid state of matter.

[0065] The problem relating to the heat pump system is solved by an object having the features of claim 11.

[0066] A preferred embodiment is characterized in that a heat pump system comprises a valve device according to the invention. This results in a particularly compact and simple heat pump system. It is especially advantageous if the heat pump system is designed and / or used for cooling and / or heating.

[0067] Another preferred embodiment is characterized in that the heat pump system comprises a compressor and an evaporator and / or a condenser. Furthermore, it is conceivable that the heat pump system additionally includes a fluid storage tank or a bypass line for the valve device. In other words, the heat pump system comprises a compressor and an evaporator, a compressor and a condenser, or a compressor, an evaporator, and a condenser. It is particularly preferred if the heat pump system includes a compressor, an evaporator, or a condenser in which the valve device is integrated. This provides a particularly compact heat pump system.

[0068] The problem concerning the building is solved by providing a device with the features of claim 13. A preferred embodiment is characterized in that a building has a heat pump system and / or a valve device according to the invention.

[0069] Advantageous embodiments of the present invention are described in the dependent claims and in the following description of the figures. Brief description of the drawings

[0070] The invention will now be explained in detail using exemplary embodiments and with reference to the drawings. The drawings show: Fig. 1 a building according to the invention, Fig. 2a a valve device according to the invention with a first valve body position, Fig. 2b a valve device according to the invention with a second valve body position, Fig. 3 an electric actuator of the valve device according to the invention, Fig. 4 a valve body, Fig. 5 a locking element, Fig. 6 an interface, and Fig. 7 a fluid connection. Preferred embodiment of the invention

[0071] The Fig. Figure 1 shows a building 1 according to the invention, comprising a heat pump system 2 and a valve device 3a according to the invention. The building 1 is, for example, a residential or commercial building that can be heated and cooled by the heat pump system 2. The valve device 3a, and thus the heat pump system 2, can be controlled or regulated by a control unit 9. The control unit 9 is connected, on the one hand, to a thermostat 8, which allows the desired temperature within the building to be set, and on the other hand, to an interface 11 of the valve device 3a. The interface 11 is designed as a hardware data interface through which measurement signals from temperature sensors 13 and pressure sensors 14 of the valve device 3a can be transmitted to the control unit 9.The temperature sensors 13 and the pressure sensors 14 measure the temperatures and pressures of a first and a second refrigerant flow, the two refrigerant flows being controlled or regulated by the valve device 3a. The valve device 3a also has six fluid connections 12a to which a compressor 4, an evaporator 6, and a condenser 7 of the heat pump system 2, as well as a fluid storage tank 5 of the heat pump system 2, are fluidically connected. Instead of the fluid storage tank 5, a short-circuit line that directly short-circuits the two fluid connections 12a is conceivable. The condenser 7 is a device in which a substance can be converted from the gaseous state to the liquid state. The valve device 3a also has a valve housing 3b, which is made of plastic or, alternatively, aluminum.Furthermore, the valve device 3a has an electric actuator 10 by means of which a first valve body within the valve device housing 3b can be adjusted. Depending on the position of the first valve body, the first refrigerant flow can be controlled or regulated. Using the first refrigerant flow, a second valve body within the valve device housing 3b can be adjusted. Depending on the position of the second valve body, the second refrigerant flow can be controlled or regulated. In addition, the valve device 3a has two fluid service ports 12b through which the refrigerant can be filled, drained, or replaced. As long as the valve device 3a is not being serviced, the two fluid service ports 12b are each sealed refrigerant-tight by means of a threaded plug.

[0072] The Fig. Figure 2a shows a sectional view through the valve device 3a. The electric actuator 10 and the first valve body 102 coupled to the electric actuator 10 are visible. The first valve body 102 is received in a first receptacle 103 of the valve device housing. The electric actuator 10 seals the first receptacle 103 in a refrigerant-tight manner. A second receptacle 223 is arranged parallel to the first receptacle 103, containing a second valve body 222. The second receptacle 223 is formed by a through-bore extending through the valve device housing of the valve device 3a. The openings at the ends of the second receptacle 223 are sealed refrigerant-tight by two sealing elements 224, 225. The first receptacle 103 and the second receptacle 223, which both extend horizontally and parallel to each other, are fluidically connected to one another by means of vertically extending connecting channels.Since the electric actuator 10 holds the first valve body 102 in a first position, certain connecting channels are either open or closed, causing the second valve body 222 to assume a first end position. In other words, the second valve body 222 has been actuated by the first refrigerant flow. With such a switching position of the valve bodies 102 and 222, the heat pump system can, for example, be operated in a heating mode.

[0073] The Fig. 2b shows the sectional view from the Fig. 2a, with the difference that the first valve body 102 is now held in a second position by the electric actuator 10, whereby the second valve body 222 assumes a second end position in the second receptacle 223. Here too, the second valve body 222 was actuated by the first refrigerant flow, since the first valve body 102 is in a different position than in the Fig. 2a. With such a switching position of the valve bodies 102, 222, the heat pump system can, for example, be operated in a cooling mode.

[0074] The Fig. Figure 3 shows the electric actuator 10 from the previous figures. It can be seen that the electric actuator 10 is coupled to the first valve body 102, enabling the electric actuator 10 to move the valve body 102 axially. Furthermore, the electric actuator 10 has an actuator flange 101, which allows the electric actuator 10 to be mounted on the valve housing. A sealing ring in the area of ​​the actuator flange 101 also ensures that no refrigerant can escape from the first inlet into the environment when the electric actuator 10 is mounted on the valve housing.

[0075] The Fig. Figure 4 shows the second valve body 222 from the Fig. 2a and Fig. 2b. The second valve body 222 has a sealing ring 226 at each of its end regions or end sections, which serve as a bearing within the second receptacle. The second valve body 222 has a first valve body section 227 and a second valve body section 228, with both valve body sections 227, 228 arranged between the two end regions of the second valve body 222. While the first valve body section 227 has a recess that allows one of the fluid flows to flow into the second receptacle depending on the position of the second valve body 222 in the second receptacle, the second valve body section is designed such that it is able to interrupt one of the fluid flows from flowing into the second receptacle depending on the position of the second valve body 222 in the second receptacle.

[0076] The Fig. Figure 5 reveals one of the two locking elements 224, 225 from the Fig. 2a. It can be seen that a sealing ring 229 is also arranged here to prevent the refrigerant from escaping from the valve assembly. In other words, the sealing elements 224, 225 ensure that the second inlet is sealed refrigerant-tight from the environment.

[0077] The Fig. Figure 6 reveals interface 11 from the Fig. 1, wherein the interface 11 is designed as a male hardware data interface and has several plug contacts 110.

[0078] The Fig. Figure 7 reveals one of the fluid connections 12a from Fig. 1. The fluid connection 12a is made of a corrosion-resistant material and is designed as a fluid nozzle.

[0079] The different features of the individual embodiments can also be combined with one another. The embodiments of Fig.Paragraphs 1 to 7 are not restrictive in nature and serve to clarify the inventive concept. Reference symbol list 1 building 2 Heat pump systems 3a Valve device 3b Valve device housing 4 Compressor 5 fluid storage tanks 6 evaporators 7 Capacitor 8 Thermostat 9 Control unit 10 electric actuator 101 Actuator flange 102 first valve body 103 first recording 11 Interface 110 plug contacts 12a Fluid connection 12b Fluid maintenance connection 13 Temperature sensor 14 Pressure sensor 222 second valve body 223 second recording 224 Locking element 225 Locking element 226 Sealing ring 227 first valve body section 228 second valve body section 229 Sealing ring

Claims

[1] Valve device (3a) for a heat pump system (2), comprising - a valve device housing (3b), - an electric actuator (10), - a first valve body (102) for controlling or regulating a first fluid flow, wherein the first valve body (102) is adjustable by the electric actuator (10), and - a second valve body (222) for controlling or regulating a second fluid flow, wherein the second valve body (222) is adjustable by the first fluid flow, wherein the electrical actuator (10) is arranged in or on the valve device housing (3b), wherein the first valve body (102) and the second valve body (222) are arranged in the valve device housing (3b), characterized by, that the valve device (3a) has at least one pressure sensor (14) or one temperature sensor (13) and that the valve device housing (3b) has openings which serve to form fluid channels or connecting channels within the valve device housing (3b), wherein at least one of the openings is closed by one of the sensors (13, 14). [2] Valve device (3a) for a heat pump system (2) according to one of the preceding claims, characterized by , that the valve device housing (3b) is made of plastic and / or metal. [3] Valve device (3a) for a heat pump system (2) according to one of the preceding claims, characterized by , that the valve device housing (3b) has fluid connections (12a) for the first and second fluid flows and fluid channels for the first and second fluid flows. [4] Valve device (3a) for a heat pump system (2) according to one of the preceding claims, characterized by, that at least part of the valve device housing (3b), which has fluid channels, is formed in one piece. [5] Valve device (3a) for a heat pump system (2) according to one of the preceding claims, characterized by , that the electrical actuator (10) is a linear actuator. [6] Valve device (3a) for a heat pump system (2) according to one of the preceding claims, characterized by , that the valve device housing (3b) has a first mounting opening for the first valve body (102) and / or that the valve device housing (3b) has a second mounting opening for the second valve body (222). [7] Valve device (3a) for a heat pump system (2) according to one of the preceding claims, characterized by , that the first and / or the second valve body (102, 222) is designed as a cylindrical valve. [8] Valve device (3a) for a heat pump system (2) according to one of the preceding claims, characterized by, that the valve device (3a) has at least six fluid ports (12a), wherein the first two of the at least six fluid connections (12a) can be fluidically connected to a compressor (4), wherein the second two of the at least six fluid connections (12a) can be fluidically connected to a condenser (7) and / or evaporator (6) and wherein the third two of the at least six fluid connections (12a) can be fluidically connected to a fluid storage device (5) or a short-circuit line. [9] Valve device (3a) for a heat pump system (2) according to one of the preceding claims, characterized by that the valve device housing (3b) has at least one fluid service port. [10] Valve device (3a) for a heat pump system (2) according to one of the preceding claims characterized by , that the valve device (3a) includes a control unit (9) and / or an interface (11). [11] Heat pump system (2) comprising a valve device (3a) according to any one of the preceding claims. [12] Heat pump system (2) according to claim 11, comprising a compressor (4) and an evaporator (6) and / or a condenser (7). [13] Building (1) with a device (2, 3a) according to one of the preceding claims.

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