Valve device, water module, and heat pump system

Abstract

The utility model provides a valve device, a water module and a heat pump system, which can avoid mutual locking due to corrosion caused by long-term contact with water, can ensure self strength and has high reliability. The valve device includes: a valve seat having a flow passage from an inflow passage through which a fluid flows in to an outflow passage through which the fluid flows out; the cylinder plug and the guide column are arranged in the flow channel on a flowing path of fluid and can adjust opening and closing of the flow channel, the guide column comprises a first section which is close to one side of the inflow channel and matched with the cylinder plug, the first section of the guide column is at least partially contained in the cylinder plug, and the first section of the guide column is at least partially contained in the cylinder plug. At least one of the first section of the guide column and the cylinder plug is made of a metal material and a resin material, and the surface, adjacent to the other, of one of the first section and the cylinder plug is a resin surface.

Description

TECHNICAL FIELD

[0001] The utility model relates to the valve device for using in heat pump system, water module with preceding valve device and heat pump system including preceding water module. BACKGROUND

[0002] Water module is the indoor temperature regulation equipment commonly used in modern family, in heat pump system, can adjust the pressure difference between inlet pipe section and outlet pipe section through using the valve device (bypass valve) set on bypass pipe section, to ensure the normal operation of water module, to meet people's demand for indoor heating.

[0003] Below, reference FIG. 10 , the existing bypass valve 10 is explained.

[0004] As FIG. 10 shown, Chinese utility model patent CN204664525U discloses a kind of bypass valve, and the bypass valve 10 includes: valve seat 101, the valve seat has inflow passage 1011 for fluid inflow and outflow passage 1012 for fluid outflow;Valve cover 104, the valve cover 104 is connected with the valve seat 101;Cylinder plug 102, the cylinder plug 102 is set between the inflow passage 1011 and the outflow passage 1012 on the flow path of fluid;Guide column 103, the lower part of the guide column 103 is housed in the cylinder plug 102, and upper part is abutted in the valve seat 101;And spring 105, the spring 105 is arranged between the valve seat 101 and the cylinder plug 102.

[0005] In existing bypass valve 10, guide column 103 for adjusting the opening and closing of bypass valve 10 is integrally formed. In addition, guide column 103 and cylinder plug 102 that houses the lower part of guide column 103 are usually made of metal (such as brass).

[0006] In addition, bypass valve is widely used in urban water supply network, family water supply, air conditioning system supply / backwater, to balance the pressure difference of valve, since guide column 103 and cylinder plug 102 inside bypass valve 10 need to be in contact with water for a long time, therefore, according to the difference of water quality or condition, etc., guide column 103 and cylinder plug 102 may be mutually stuck due to rust.

[0007] In order to avoid the situation of mutual sticking due to rust, it is also possible to make guide column 103 and cylinder plug 102 both made of resin (such as PPS material) and other materials that are not easy to rust. However, guide column 103 is lifted and seated relative to cylinder plug 102 to realize the opening and closing adjustment of bypass valve 10, and the resin material is not enough in strength, which affects the use reliability.

[0008] Therefore, it is urgent to seek a valve device which can not only avoid mutual jamming due to rust caused by long-term contact with water, but also ensure its strength and high reliability. Content of the Utility Model

[0009] The utility model is made to solve the prior art problems, and aims at providing a valve device which can avoid mutual jamming due to rust caused by long-term contact with water and ensure its strength and high reliability.

[0010] Another purpose of the utility model is to provide a water module provided with the valve device.

[0011] Still another purpose of the utility model is to provide a heat pump system comprising the water module.

[0012] In order to achieve the purpose of the utility model, the utility model provides a valve device, which comprises a valve seat having a flow channel from an inflow passage for fluid inflow to an outflow passage for fluid outflow; a cylinder plug and a guide column, which are arranged in the flow channel on the flow path of the fluid and can adjust the opening and closing of the flow channel, characterized in that the guide column comprises a first section on the side of the inflow passage and matched with the cylinder plug, the first section of the guide column is at least partially accommodated in the cylinder plug, at least one of the first section of the guide column and the cylinder plug is made of metal material and resin material, and the surface of one adjacent to the other is a resin surface.

[0013] According to the above-mentioned structure, since at least one of the first section of the guide column and the cylinder plug is made of metal material and resin material, and the surface of one adjacent to the other is a resin surface, the guide column and the cylinder plug made of metal material can be effectively prevented from being mutually jammed due to rust caused by long-term contact with water, and the guide column and the cylinder plug made of resin material can be effectively prevented from being easily deformed or damaged due to insufficient strength, thereby ensuring the reliability of the valve device.

[0014] Preferably, the valve device has a valve body connected with the valve seat, the guide column further comprises a second section connected with the valve body and made of metal material, and the middle part of the first section of the guide column is a metal base section made of metal material, and a resin covering section made of resin material is arranged around the metal base section of the first section.

[0015] According to the above-mentioned structure, by arranging the resin covering section around the metal base section of the first section of the guide column, the strength of the resin covering section on the outer circumferential side can be improved by the metal base section in the middle, so that the first section of the guide column as a whole has sufficient strength and is prevented from being weakened in overall strength due to the use of resin material in a local part.

[0016] Preferably, the metal base section of the first section is in a cylindrical shape, one end of which is integrally formed with the second section, and a groove is provided at the other end of the metal base section on the side facing the cylinder plug, and a portion of the resin covering section is embedded in the groove.

[0017] Further preferably, a plurality of holes are provided in the circumferential direction of the outer wall surface of the metal base section in a cylindrical shape, and a portion of the resin covering section is embedded in the holes.

[0018] According to the above configuration, by providing a groove, or holes (openings or pits) alone or in combination, the tensile force between the metal and the resin in the first section of the guide pin can be improved, so that the resin material is less likely to break, and the strength of the first section of the guide pin can be improved.

[0019] Preferably, a plurality of holes are provided in one or more groups at equal angles in the circumferential direction of the outer wall surface of the metal base section in a cylindrical shape.

[0020] According to the above configuration, by providing a plurality of groups of holes, the tensile force between the metal and the resin can be improved, and by providing the plurality of holes at equal angles, the tensile force between the metal and the resin can be improved more uniformly, and the breakage of the resin material due to uneven stress distribution can be reduced.

[0021] Preferably, when the axial length of the first section formed after the resin covering section surrounds the metal base section is H1, and the axial length of the metal base section in the first section is H2, 1 / 3 ≤ H2 / H1 ≤ 2 / 3 is satisfied.

[0022] If H2 / H1 is too large, the content of the metal material in the first section of the guide pin will be too large, increasing the cost of using copper and causing an increase in cost. Conversely, if H2 / H1 is too small, although the cost can be reduced by reducing the amount of copper used, the content of the resin material in the first section of the guide pin will be too large, and it will be difficult to ensure that the first section of the guide pin has sufficient strength, and the reliability problem cannot be improved to the maximum extent. By setting 1 / 3 ≤ H2 / H1 ≤ 2 / 3, both the problem of cost increase due to the use of copper and the reliability problem of the guide pin are taken into account.

[0023] Preferably, the cylinder plug for receiving the first section of the guide pin has a back surface abutting against the bottom support portion of the valve seat, and a cylinder plug main body extending in a cylindrical shape from the bottom support portion to the side of the guide pin, and the cylinder plug main body is made of metal, and a first resin covering layer made of a resin material covers the inner peripheral surface of the cylindrical cylinder plug main body.

[0024] According to the above configuration, the inner peripheral surface of the cylinder plug main body of the cylinder plug can be prevented from rusting and being stuck with the guide pin, and the operation of the valve device can be further affected.

[0025] Further preferably, the bottom support portion of the cylinder plug is made of metal, and at least the back surface of the bottom support portion of the cylinder plug that abuts against the valve seat is provided with a second resin covering layer made of resin material.

[0026] In addition to the fact that the opposite surfaces of the cylinder plug and the guide post are prone to rust and stuck to each other, the part of the cylinder plug that contacts the valve seat is also prone to rust due to long-term contact with water, thereby affecting the operation of the valve device. According to the above-mentioned structure, the part of the cylinder plug that contacts the valve seat can be effectively prevented from being stuck due to rust, and the operation reliability of the valve device can be improved. Because the rust falls off and flows in the flow channel, once entering the water pump, it may cause the water pump to produce abnormal sound, etc., and it may even cause the water pump impeller to be damaged, thereby causing the fluid to be unable to normally circulate in the water module.

[0027] In addition, in the valve device of the utility model, a limiting groove can be arranged at the end of the valve body connected with the second section of the guide post. By using the limiting groove, as long as the upper end of the second section of the guide post is flush with the limiting groove, it can be confirmed that the guide post is installed in place. Therefore, the wear between the first section of the guide post and the cylinder plug caused by excessive downward extrusion of the guide post can be avoided.

[0028] In order to achieve another purpose of the utility model, the utility model provides a water module, which comprises: a shell, a refrigerant-water heat exchanger is arranged in the shell, a refrigerant pipe and a water pipe are connected to the refrigerant-water heat exchanger, and in the refrigerant-water heat exchanger, the refrigerant flowing through the refrigerant pipe and the water flowing through the water pipe are heat exchanged; and a water pump, which is connected with the refrigerant-water heat exchanger through the water pipe, characterized in that the water pipe comprises: a water inlet pipe section connected with the water inlet end of the refrigerant-water heat exchanger; a connecting pipe section connected with the water outlet end of the refrigerant-water heat exchanger, the connecting pipe section being connected with the water inlet of the water pump; a water outlet pipe section connected with the water outlet of the water pump; and a bypass pipe section bypassing the water inlet and the water outlet of the water pump, wherein the bypass pipe section is located in the interior of the shell, and the valve device is arranged on the bypass pipe section of the water pipe.

[0029] The utility model discloses still provide another water module, water module include the casing, be provided with refrigerant-water heat exchanger in the casing, be connected with refrigerant pipe and water pipe on refrigerant-water heat exchanger, in refrigerant-water heat exchanger, the refrigerant of flowing through refrigerant pipe and the water of flowing through water pipe carry out heat exchange, its characterized in that, water pipe includes: with the water inlet pipe section of refrigerant-water heat exchanger's water inlet end connection, with the water outlet pipe section of refrigerant-water heat exchanger's water outlet end connection and bypass the water inlet pipe section with the water outlet pipe section's bypass pipe section, water inlet pipe section, water outlet pipe section and bypass pipe section are located the outside of casing, be provided with preceding valve device on bypass pipe section of water pipe.

[0030] According to the above-mentioned structure, the valve device arranged on the outside (such as the water inlet pipe section or the water outlet pipe section) or the inside (other pipe sections of the water pipe) of the casing of the water module will not be rusted due to the long-time contact of the components in the valve device with water, and further cause the mutual jamming, affect the operation of the valve device, and can be beneficial to ensure the operation stability and reliability of the water module.

[0031] In order to realize another purpose of the utility model, a heat pump system is provided, characterized in that, comprising the aforementioned water module.

[0032] According to the above-mentioned structure, the valve device arranged on the water module is not easy to be rusted and jammed, and frequent shutdown and maintenance of the valve device are not required, so that the system can be operated for a long time, and the stability and reliability are high. BRIEF DESCRIPTION OF DRAWINGS

[0033] FIG. 1 It is a circuit diagram of a water system comprising the water module of the utility model, wherein the valve device (bypass valve) is arranged on the water circuit and connected with the water circuit for floor heating, the water tank and the fan coil circuit.

[0034] FIG. 2 It is FIG. 1 The schematic structural diagram of the valve device of the utility model arranged in the water module is shown, and the valve device (bypass valve) is in the closed state at this time.

[0035] FIG. 3A And FIG. 3B It is a structural diagram of the guide column composed of the first section and the second section of different materials, wherein, FIG. 3A It is a schematic perspective view of the guide column, FIG. 3B It is a schematic sectional view of the guide column.

[0036] FIG. 4A And FIG. 4B It is a structural diagram of FIG. 3A And FIG. 3Ba sectional view of the second section of the guide post shown in FIG. 2, FIG. 4A is a perspective view of the first section, FIG. 4B is a sectional view of the first section.

[0037] FIG. 5A and FIG. 5B is a sectional view of the second section of the guide post shown in FIG. 2, FIG. 3A is a perspective view of the second section, FIG. 3B is a sectional view of the second section. FIG. 5A FIG. 5B

[0038] FIG. 6A and FIG. 6B is a sectional view of the second section of the guide post shown in FIG. 2, FIG. 6A is a perspective view of the second section, FIG. 6B is a sectional view of the second section.

[0039] FIG. 7 is a sectional view of the second section of the guide post shown in FIG. 2, FIG. 3B is a sectional view of the second section of the guide post shown in FIG. 2, FIG. 6B is a sectional view of the second section of the guide post shown in FIG. 2,

[0040] FIG. 8 is a circuit diagram showing a circuit configuration of one form of a heat pump system of the present application including a water module provided with the valve device shown in FIG. 1. FIG. 2

[0041] is a circuit diagram showing a circuit configuration of another form of a heat pump system of the present application including a water module provided with the valve device shown in FIG. 1. FIG. 9 FIG. 2 is a sectional view of the second section of the guide post shown in FIG. 2,

[0042] FIG. 10 is a sectional view of the second section of the guide post shown in FIG. 2, (BRIEF DESCRIPTION OF DRAWINGS)

[0044] 100 outdoor unit;

[0045] 110 compressor;

[0046] Po compressor discharge pipe;

[0047] Pi compressor suction pipe;

[0048] 120 outdoor-side heat exchanger;

[0049] V11 valve;

[0050] 130 liquid storage tank;

[0051] VF1 four-way switching valve;​​​

[0052] a first port;

[0053] b second port;

[0054] c third port;

[0055] d fourth port;

[0056] P1 first connection pipe;

[0057] P2 second connection pipe;

[0058] P3 third connection pipe;

[0059] P4 fourth connection pipe;

[0060] P101 first outdoor side pipe;

[0061] P102 second outdoor side pipe;

[0062] VC1 first stop valve;

[0063] VC2 second stop valve;

[0064] VC3 third stop valve;

[0065] VC4 fourth stop valve;

[0066] 200 indoor unit;

[0067] V21 valve;

[0068] 210 first indoor side heat exchanger;

[0069] V22 valve;

[0070] 220 second indoor side heat exchanger;

[0071] 230 indoor air supply device;

[0072] P201 first indoor side pipe;

[0073] P202 second indoor side pipe;

[0074] 300 water source heat source device;

[0075] 310 refrigerant-water heat exchanger;

[0076] V31 valve;

[0077] P301 refrigerant pipe;

[0078] P302 water pipe;

[0079] SH water circuit;

[0080] P3021 main pipe line;

[0081] P3022 branch pipe line;

[0082] 400 water circuit for floor heating;

[0083] P401 water pipe for floor heating;

[0084] VF2 three-way valve;

[0085] SX water tank;

[0086] P501 water inlet pipe;

[0087] P502 water pipe for domestic use;

[0088] 510 water terminal for domestic use;

[0089] 600 fan coil circuit;

[0090] P601 water pipe for coil circuit;

[0091] 700 valve device;

[0092] 710 valve seat;

[0093] 711 inflow passage;

[0094] 712 outflow passage;

[0095] 720 plug;

[0096] 721 bottom support portion;

[0097] 721a second resin covering layer (resin covering layer);

[0098] 721b hole portion;

[0099] 722 plug main body;

[0100] 722a first resin covering layer (resin covering layer);

[0101] 722b hole portion;

[0102] 730 guide post;

[0103] 731 first section;

[0104] 731a metal-based section;

[0105] 731b resin-coated section;

[0106] 731c slotted portion;

[0107] 731d hole portion

[0108] 732 second section

[0109] 740 valve body

[0110] 741 limit slot

[0111] 750 spring

[0112] 760 valve cover DETAILED DESCRIPTION

[0113] Hereinafter, first referring to FIG. 1 The water module 300 of the present application is connected to a water circuit structure of a water end. FIG. 1 is a circuit diagram showing a water system including the water module 300 of the present application, wherein the valve device 700 is provided on the water circuit SH and connected to a water circuit 400 for floor heating, a water tank SX and a fan coil circuit 600.

[0114] FIG. 1 The water module 300 shown in the figure is a kind of water module, which includes a housing (not shown) and a refrigerant-water heat exchanger 310 provided in the housing. The refrigerant-water heat exchanger 310 is, for example, one of a plate heat exchanger and a double pipe heat exchanger. The refrigerant-water heat exchanger 310 is connected to a refrigerant pipe P301 and a water circuit SH composed of a water pipe P302. In the refrigerant-water heat exchanger 310, refrigerant flowing through the refrigerant pipe P301 and water flowing through the water pipe P302 are heat-exchanged. In addition, it is preferable that the fluid in the water pipe P302 of the water circuit SH flows in the flow direction shown by the solid arrow in the figure, but it can also flow in the opposite flow direction.

[0115] As shown in FIG. 1As shown, the valve device 700 is provided on a water pipe P302 of a water circuit SH of the water module 300, and the water circuit 400 for floor heating, the water tank SX, and the fan-coil circuit 600 are connected thereto. Here, the water pipe P302 includes a main pipe P3021 and a branch pipe P3022 connected to the main pipe P3021 via a three-way valve VF2. The water circuit 400 for floor heating includes a water pipe P401 for floor heating connected at both ends to the main pipe P3021 of the water pipe P302. The branch pipe P3022 passes through the water tank SX, and a water inlet pipe P501 and a water pipe P502 connected to a water terminal 510 such as a faucet, a shower, and the like for domestic water are provided on the water tank SX. The fan-coil circuit 600 includes a water pipe P601 for a fan-coil circuit connected at both ends to the main pipe P3021 of the water pipe P302. In addition, although the case where the water circuit 400 for floor heating includes only one water pipe P401 for floor heating is shown here, the present application is not limited thereto, and the water circuit 400 for floor heating can include a plurality of water pipes P401 for floor heating connected in parallel. Similarly, although the case where the fan-coil circuit 600 includes only one water pipe P601 for a fan-coil circuit is shown here, the present application is not limited thereto, and the fan-coil circuit 600 can include a plurality of water pipes P601 for fan-coil circuits connected in parallel. Of course, in the case where the water circuit 400 for floor heating and the fan-coil circuit 600 are connected to the water circuit SH of the water module 300, the water circuit 400 for floor heating and the fan-coil circuit 600 can be connected to the water circuit SH of the water module 300 via the valve device 700. FIG. 1 In the structure shown, the water circuit 400 for floor heating, the water tank SX, and the fan-coil circuit 600 can be connected only to the water circuit SH of the refrigerant-water heat exchange unit 300.

[0116] (consisting of the water inlet pipe P501 (the water inlet port in the drawing is the water inlet port of the water tank SX), the water pipe P502 for domestic water, and the water terminal 510) and the fan-coil circuit 600.

[0117] In addition, the main pipe P3021 of the water pipe P302 has a water inlet pipe section connected to the water inlet end of the refrigerant-water heat exchanger 310 and a water outlet pipe section connected to the water outlet end of the refrigerant-water heat exchanger 310. A bypass pipe section connecting (bypassing) the water inlet pipe section and the water outlet pipe section, which is different from the aforementioned branch pipe P3022, is further provided therebetween. Here, whether it is the water inlet pipe section, the water outlet pipe section, or the bypass pipe section connecting (bypassing) the two, they are all located outside the housing. The valve device 700 of the present application is provided on the bypass pipe section.

[0118] Additionally, preferably, a water replenishment valve is installed on the inlet pipe section, located upstream of the bypass pipe section, for replenishing water in the water circuit. Taking the underfloor heating terminal (underfloor heating water circuit 400) as an example, in cases of maintenance, cleaning, or system failure / shutdown during winter, the water in the water circuit SH will be drained. Before restarting the system, water needs to be replenished in the water circuit SH. This can be done by opening the water replenishment valve.

[0119] (Valve device 700)

[0120] Next, refer to FIG. 2 ,right FIG. 1 The structure of the valve device 700 installed in the water module 300 shown will be described. FIG. 2 yes FIG. 1 The schematic diagram shows the valve device (bypass valve) 700 installed in the water module 300, with the valve device 700 in the closed state.

[0121] The valve device 700, installed on the inlet pipe section P302A of the water piping P302 that connects to the inlet end of the refrigerant-water heat exchanger 310, is preferably located outside the housing of the water module 300, for example, below where maintenance is convenient. FIG. 2 As shown, it includes:

[0122] The valve seat 710 has an inflow channel 711 for fluid to flow in and an outflow channel 712 for fluid to flow out; a valve body 740 is connected to the valve seat 710; a cylinder plug 720 is disposed between the inflow channel 711 and the outflow channel 712 in the fluid flow path; a guide post 730 has its lower part housed in the cylinder plug 720 and its upper part housed in the valve body 740; and a spring 750 is disposed between the valve body 740 and the cylinder plug 720 and is sleeved on the outside of the guide post 730.

[0123] (Guide post 730 and cylinder plug 720)

[0124] Next, refer to FIGS. 3A-6B as well as FIG. 7 and combined FIG. 2 The structure of the guide post 730 and the cylinder plug 720 in the valve device 700 of this utility model, as well as the shape of the guide post 730 relative to the cylinder plug 720 when the valve device 700 is closed and open, are described below. FIG. 3A and FIG. 3B This is a structural diagram showing the guide post 730, which is composed of a first section 731 and a second section 732 made of different materials. FIG. 4A and FIG. 4B It means FIG. 3A and FIG. 3BThe diagram shows the structure of the first segment 731 in the guide post 730. FIG. 5A and FIG. 5B It means FIG. 3A and FIG. 3B The diagram shows the structure of the second segment 732 in the guide post 730. FIG. 6A and FIG. 6B This is a structural diagram showing cylinder piston 720. FIG. 7 yes FIG. 3B The guide post 730 shown is inserted into FIG. 6B The schematic cross-sectional view shown is of the cylinder piston 720 in its seated position, with the valve device (bypass valve) 700 in the open state.

[0125] In a valve device 700 according to an embodiment of the present invention, the guide post 730 consists of a first section 731 that mates with the cylinder plug 720 (see...). FIG. 4A , FIG. 4B , FIG. 7 ) and the second section 732 connected to the valve body 740 (see FIG. 2 , FIG. 5A , FIG. 5B ) constitutes. For example FIG. 3A and FIG. 3B As shown, the first segment 731 of the guide post 730 is located below the second segment 732, and as... FIG. 7 As shown, the first segment 731 is at least partially (e.g., the lower part of the first segment 731) housed within the cylinder plug 720. The guide post 730, more specifically, the first segment 731 of the guide post 730, is capable of being raised or seated relative to the cylinder plug 720 to open or close the flow path of the valve device 700 from the inlet passage 711 to the outlet passage 712. In the valve device 700 as... FIG. 2 When the valve is in the closed state, the guide post 730 is inserted into the cylinder plug 720 and sits down. At this time, the flow path of the fluid supply to the valve device 700 from the inflow channel 711 to the outflow channel 712 is completely closed. On the other hand, when the valve device 700 is in the closed state... FIG. 7 When the valve is in the open state, the guide post 730 is raised relative to the cylinder plug 720 to leave a gap for the cylinder plug 720 to move. At this time, if the flow rate pressure (pressure head) of the fluid flowing in from the inflow channel 711 is greater than the elastic force of the spring 740 itself, the fluid will push open the cylinder plug 720, so that the inflow channel 711 and the outflow channel 712 of the valve device 700 are connected.

[0126] Furthermore, since the guide post 730 is raised relative to the cylinder plug 720 and exposed on the outer surface of the valve body 740 when the valve device 700 is in the open state, it is preferable that, FIG. 2 As shown, the exposed guide post 730 is covered by a valve cover 760.

[0127] In this invention, the first segment 731 and the second segment 732 of the guide post 730 are made of different materials. Specifically, the first segment 731 of the guide post 730 is made of metal and resin, and the second segment of the guide post 730 is made of metal.

[0128] like FIG. 4B As shown, the middle part of the first section 731 of the guide post 730 is a metal base section 731a made of metal material, and a resin-coated section 731b made of resin material surrounds the metal base section 731a. Thus, the surface (outer peripheral surface) of the first section 731 of the guide post 730 adjacent to the cylinder plug 720 is formed into a resin surface that is not easy to rust and jam.

[0129] The metal base segment 731a is cylindrical, such as FIG. 3B As shown, one end of it is integrally formed with the second section 732 of the guide post 730, which is made of metal. Additionally, as... FIG. 4B As shown, the end of the metal base segment 731a facing the cylinder plug 720 (the other end) is preferably provided with a groove 731c, and a portion of the resin-coated segment 731b is embedded in the groove 731c. Furthermore, as... FIG. 4B As shown, the cylindrical outer wall of the metal base segment 731a has multiple holes 731d formed in the circumferential direction, and a portion of the resin-coated segment 731b is embedded in the holes 731d. The holes 731d can be either openings where the metal base segment 731a has a groove 731c, or recesses where the metal base segment 731a does not have a groove 731c or the groove 731c is not deep enough. Preferably, one or more sets of holes 731d are evenly spaced at equal angles in the circumferential direction of the cylindrical outer wall of the metal base segment 731a. In this way, whether the groove 731c is provided, or the opening or recess is provided as a hole 731d, the tensile strength between the metal and resin in the first segment 731 of the guide post 730 can be increased, thereby improving the strength of the first segment 731 of the guide post 730.

[0130] like FIG. 4BAs shown, when the axial length of the first segment 731, i.e., the axial length of the first segment 731 formed after the resin surrounds the metal base segment 731a, is H1, and the axial length of the metal base segment 731a in the first segment 731 is H2, it is preferable that 1 / 3 ≤ H2 / H1 ≤ 2 / 3. If H2 / H1 is too large, the metal content in the first segment 731 of the guide post 730 will be too large. After long-term contact with water, rust will appear in the first segment 731 of the guide post 730, and the situation of jamming with the cylinder plug 720 will not be improved to the maximum extent. Conversely, if H2 / H1 is too small, although it can effectively improve the defect of jamming due to rust, the resin content in the first segment 731 of the guide post 730 will be too large, making it difficult to ensure that the first segment 731 of the guide post 730 has sufficient strength, and the reliability problem will not be improved to the maximum extent. By ensuring that 1 / 3≤H2 / H1≤2 / 3, both the defect of mutual jamming due to corrosion and the reliability improvement of guide post 730 are achieved.

[0131] In a valve device 700 according to an embodiment of the present invention, such as FIG. 6A , FIG. 6B As shown, cylinder plug 720 is used to receive the first section 731 of guide post 730. More specifically, as... FIG. 6B As shown, the cylinder plug 720 has a base portion 721 whose back side abuts against the valve seat 710 and a cylinder plug body 722 that extends cylindrically from the base portion 721 to the guide post 730.

[0132] Furthermore, in one embodiment of the valve device 700 of this utility model, it is preferable that the cylinder plug 720 is made of metal and resin. Specifically, the base 721 and the cylinder plug body 722 of the cylinder plug 720 are made of metal, and a first resin coating layer (resin coating layer) 722a made of resin covers the inner circumferential surface of the cylindrical cylinder plug body 722. This makes the surface (inner circumferential surface) of the cylinder plug 720 adjacent to the first segment 731 of the guide post 730 a resin surface that is less prone to corrosion and jamming. Additionally, a hole 722b is preferably provided on the inner circumferential surface of the cylindrical cylinder plug body 722, thereby increasing the tensile strength of the metal and resin in the cylinder plug body 722 and improving the overall strength of the cylinder plug body 722.

[0133] Furthermore, it is even more preferable that the back side of the base portion 721 of the cylinder plug 720, at least the portion abutting against the valve seat 710, is provided with a second resin coating layer (resin coating layer) 721a made of resin material. Similarly, a hole 721b may also be provided on the back side of the base portion 721 of the cylinder plug 720, thereby increasing the tensile strength between the metal and resin in the base portion 721 and improving the strength of the base portion 721.

[0134] In a valve device 700 according to an embodiment of the present invention, in such a way...FIG. 7 As shown, FIG. 3B The guide post 730 shown is inserted into FIG. 6B When the cylinder plug 720 is seated, the outer peripheral surface of the first section 731 of the guide post 730 adjacent to the cylinder plug 720, the inner peripheral surface of the cylinder plug 720 adjacent to the first section 731 of the guide post 730, and at least the portion of the back of the bottom support portion 721 of the cylinder plug 720 that abuts against the valve seat 710 are parts that are in long-term contact with water. Therefore, it is preferable that all three parts are made of resin.

[0135] According to the structure of the valve device 700 of an embodiment of the present invention, it can effectively prevent the guide post and cylinder plug, which are made entirely of metal, from rusting and jamming each other after prolonged contact with water, thus preventing the valve device 700 from operating. At the same time, it can also effectively prevent the guide post and cylinder plug, which are made entirely of resin, from easily deforming or even being damaged due to insufficient strength, which helps to ensure the reliability of the valve device 700.

[0136] Below, first refer to FIG. 8 The present invention includes the provision of... FIG. 2 The circuit structure of the heat pump system 1 of the water module 300 of the valve device 700 shown will be described. FIG. 8 This utility model includes the following features: FIG. 2 The diagram shows a loop structure of one type of heat pump system with a water module and a valve device.

[0137] like FIG. 8 As shown, the heat pump system 1 of this embodiment includes an outdoor unit 100, an indoor unit 200 (e.g., a three-pipe indoor unit) and a water module 300. These outdoor units 100, indoor units 200 and water modules 300 are interconnected by multiple (e.g., four) connecting pipes.

[0138] The aforementioned multiple connecting pipes include a first connecting pipe P1, a second connecting pipe P2, a third connecting pipe P3, and a fourth connecting pipe P4.

[0139] In this specification, a three-pipe indoor unit refers to an indoor unit that can be connected to three of the multiple connecting pipes (first connecting pipe P1 to fourth connecting pipe P4) of the heat pump system 1. For example, in this embodiment, the indoor unit 200 can be connected to the first connecting pipe P1, the second connecting pipe P2, and the third connecting pipe P3 of the heat pump system 1 to allow refrigerant to flow between the outdoor unit 100 and the indoor unit 200.

[0140] (Outdoor Unit 100)

[0141] Additionally, the outdoor unit 100 includes a compressor 110, an outdoor heat exchanger 120, a valve V11, a liquid storage tank 130, and a four-way switching valve VF1. Furthermore, the outdoor unit 100 also includes an outdoor air supply device 140, which supplies air to the outdoor heat exchanger 120.

[0142] Specifically, the discharge side of compressor 110 is connected to one end of compressor discharge pipe (equivalent to the "discharge pipe" of this utility model) Po, and the other end of the compressor discharge pipe Po is located at... FIG. 8 Point K10 is connected to one end of the first outdoor pipe P101, midway through the compressor discharge pipe Po (located in...). FIG. 8 At point K11, the second outdoor piping P102 branches off. One end of the second outdoor piping P102 is located at... FIG. 8 Point K11 is connected to the compressor discharge pipe Po mentioned above.

[0143] Additionally, the other end of the first outdoor piping P101 is connected to the first port a of the four-way switching valve VF1, and the other end of the second outdoor piping P101 is connected to the fourth port d of the four-way switching valve VF1. Furthermore, the second port b of the four-way switching valve VF1 is connected to one end of the second connecting piping P2, and the third port c of the four-way switching valve VF1 is connected to one end of the third connecting piping P3. The aforementioned four-way switching valve VF1 can switch between a first switching state and a second switching state. In the first switching state, the four-way switching valve VF1 is switched to connect the first port a to the second port b and the third port c to the fourth port d, thereby connecting the first outdoor piping P101 to the second connecting piping P2 and the second outdoor piping P102 to the third connecting piping P3. In the second switching state, the four-way switching valve VF1 is switched to connect the first port a to the fourth port d and the second port b to the third port c, thereby connecting the first outdoor piping P101 to the second outdoor piping P102 and the second connecting piping P2 to the third connecting piping P3. Additionally, in the middle of the second outdoor piping P102 (located...) FIG. 8 At point K12, the branch has a fourth connecting pipe P4.

[0144] On the other hand, the suction side of compressor 110 is connected to one end of compressor suction pipe Pi, and the other end of compressor suction pipe Pi (located in...) FIG. 8 The first connecting pipe P1 is connected at point K13. A liquid storage tank 130 is installed in the middle of the compressor suction pipe Pi.

[0145] In addition, an outdoor heat exchanger 120 and a valve V11 are provided midway through the first connecting pipe P1, more specifically, in the portion of the first connecting pipe P1 located in the outdoor unit 100.

[0146] For ease of description, the first connecting pipe P1, second connecting pipe P2, third connecting pipe P3, and fourth connecting pipe P4 referred to in this utility model all include a portion of the pipe located within the corresponding outdoor unit 100. Unless otherwise specified, in this embodiment, the first connecting pipe P1 includes an outdoor unit-side connecting pipe and an external connecting pipe. The outdoor unit-side connecting pipe and the external connecting pipe of the aforementioned first connecting pipe P1 are separated by a first shut-off valve VC1. Hereinafter, the first shut-off valve VC1 is sometimes also referred to as... FIG. 8 The pipe section between point K13 is called the outdoor unit side connecting pipe of the first connecting pipe P1, and the first shut-off valve VC1 is connected to... FIG. 8 The pipe section between point K30 is referred to as the external connection pipe of the first connecting pipe P1. Similarly, the second connecting pipe P2 includes an outdoor unit-side connecting pipe and an external connection pipe. The outdoor unit-side connecting pipe of the second connecting pipe P2 is the pipe section between the second port b of the four-way switching valve VF1 and the second shut-off valve VC2. The external connection pipe of the second connecting pipe P2 is the pipe section between the second shut-off valve VC2 and... FIG. 8 The pipe section between point K21. The third connecting pipe P3 includes outdoor unit-side connecting pipe and external connecting pipe. The outdoor unit-side connecting pipe of the third connecting pipe P3 is the pipe section between the third port c of the four-way switching valve VF1 and the third shut-off valve VC3. The external connecting pipe of the third connecting pipe P3 is the pipe section between the third shut-off valve VC3 and... FIG. 8 The pipe section between point K23. The fourth connecting pipe P4 includes outdoor unit-side connecting pipe and external connecting pipe. The outdoor unit-side connecting pipe of the fourth connecting pipe P4 is... FIG. 8 The pipe section between point K12 and the fourth shut-off valve VC4, and the external connection pipe of the fourth connecting pipe P4 is the pipe between the fourth shut-off valve VC4 and... FIG. 8 The pipe section between point K31.

[0147] In other words, the first shut-off valve VC1 is used to connect the portion inside the outdoor unit 100 of the first connecting pipe P1 to the portion outside the outdoor unit 100, the second shut-off valve VC2 is used to connect the portion inside the outdoor unit 100 of the second connecting pipe P2 to the portion outside the outdoor unit 100, the third shut-off valve VC3 is used to connect the portion inside the outdoor unit 100 of the third connecting pipe P3 to the portion outside the outdoor unit 100, and the fourth shut-off valve VC4 is used to connect the portion inside the outdoor unit 100 of the fourth connecting pipe P4 to the portion outside the outdoor unit 100.

[0148] Under normal circumstances, the first shut-off valve VC1, the second shut-off valve VC2, the third shut-off valve VC3, and the fourth shut-off valve VC4 are in the normally open state. However, in certain situations, any one or more, or even all of the first shut-off valves VC1 to the fourth shut-off valve VC4, can be omitted.

[0149] (Indoor Unit 200)

[0150] The indoor unit 200 is equipped with a valve V21, a first indoor heat exchanger 210, a valve V22, a second indoor heat exchanger 220, and an indoor air supply device 230 for delivering heat or cold energy from the indoor unit 200 into the room.

[0151] Specifically, in the middle of the first connecting pipe P1 (located in...) FIG. 8 At point K20, a first indoor piping P201 branches off. Midway through this first indoor piping P201, one end of the first indoor piping P201 (located at...) FIG. 8 Starting from point K20, valve V21 and the first indoor heat exchanger 210 are sequentially installed. One end of the first indoor piping P201 (located at...) FIG. 8 The first indoor pipe P201 (located at point K20) is connected to the external connecting pipe of the first connecting pipe P1 (the part located outside the outdoor unit 100), and the other end of the first indoor pipe P201 (located at point K20) is connected to the external connecting pipe of the first connecting pipe P1 (the part located outside the outdoor unit 100). FIG. 8 The second connecting pipe (located outside the outdoor unit 100) is connected to the external connecting pipe of the second connecting pipe P2 (at point K21 in the middle).

[0152] Midway through the aforementioned first indoor interior piping P201, located between point K20 and the aforementioned valve V21 (located in... FIG. 8 At point K22, a second indoor piping P202 branches off. Midway through the second indoor piping P202, from one end (located at...) FIG. 8 Starting from point K22, valve V22 and the second indoor heat exchanger 220 are installed sequentially. One end of the aforementioned second indoor piping P202 (located at...) FIG. 8 The point K22 in the middle) is connected to the first indoor side piping P201 and is located between the valve V21 and one end of the first indoor side piping P201. The other end of the second indoor side piping P202 (located at...) FIG. 8 The external connecting pipe (located outside outdoor unit 100) of the third connecting pipe P3 is connected at point K23 in the middle.

[0153] Here, the first indoor heat exchanger 210 and the second indoor heat exchanger 220 are arranged in the flow path of the airflow formed by the indoor air supply device. Furthermore, electric valves or solenoid valves can be used as valves V21 and V22.

[0154] (Water Module 300)

[0155] The water module 300 includes a refrigerant piping P301, a water circuit SH consisting of a water piping P302, and a refrigerant-water heat exchanger 310 that allows heat exchange between the refrigerant flowing through the refrigerant piping P301 and the water flowing through the water piping P302. Specifically, one end of the refrigerant piping P301 (located at...) FIG. 2 At point K30 in the middle, it is connected to the external connecting pipe (located outside the outdoor unit 100) of the first connecting pipe P1, and on the above-mentioned refrigerant pipe P301, from one end (located at...) FIG. 8 Valve V31 is installed sequentially starting from point K30 in the middle.

[0156] (equivalent to the "water module-side refrigerant regulating device" of this utility model), refrigerant-water heat exchanger 310, and the other end of the above-mentioned refrigerant piping P301 (located in FIG. 8 The external connection pipe (located outside the outdoor unit 100) of the fourth connection pipe P4 is connected at point K31 in the middle.

[0157] Here, it is preferable that the water in the piping of the water circuit SH flows in the direction of the solid arrow in the diagram (for example, refer to...). FIG. 8 ).

[0158] (First connecting pipe P1 to fourth connecting pipe P4)

[0159] The first connecting pipe P1 connects one end of the first indoor side pipe P201 of the indoor unit 200 (located in...). FIG. 8 (at point K20 in the middle) and the other end of the compressor suction pipe Pi (located at...) FIG. 8 The second connecting pipe P2 connects to the other end of the first indoor side pipe P201 of the indoor unit 200 (located at point K13). FIG. 8 The third connecting pipe P3 connects the other end of the second indoor side pipe P202 of the indoor unit 200 (located at K21) to the second port b of the four-way switching valve VF1. FIG. 8 Point K23 in the middle) is connected to the third port c of the four-way switching valve VF1, and the fourth connecting pipe P4 connects the other end of the refrigerant pipe P301 of the water module 300 (located at point K23 in the middle) to the third port c of the four-way switching valve VF1. FIG. 9 The middle section between point K31 and the second outdoor external piping P102 (located at point K31) and point P102. FIG. 1 Connect point K12 in the middle.

[0160] In addition, the heat pump system 1 in this embodiment also includes a control unit (not shown), which is used to control the operation of components such as the compressor 110, outdoor air supply device 140, valve V11, valve V21, valve V22, indoor air supply device 220, valve V31 and four-way switching valve VF1 of the heat pump system 1.

[0161] Other advantages and modifications will readily occur to those skilled in the art. Therefore, in its broader sense, this invention is not limited to the specific details and representative embodiments shown and described herein. Thus, modifications can be made without departing from the spirit or scope of the overall inventive concept as defined by the appended claims and their equivalents.

[0162] For example, in the heat pump system 1 of this utility model, such as FIG. 8 As shown, the indoor unit 200 is illustrated using a three-pipe indoor unit as an example, but this utility model is not limited to this and can also be described as follows. FIG. 8 The diagram shows a two-pipe indoor unit, with the outdoor unit 100, indoor unit 200, and water module 300 interconnected via three connecting pipes.

[0163] In addition, in the water module 300 of this utility model, such as FIG. 1 As shown, the example described uses a bypass pipe section (located outside the housing of the water module 300) that connects the inlet and outlet pipe sections of the water pipe P302 in the water circuit SH, where the aforementioned valve device 700 is installed. However, this invention is not limited to this; it can also be other bypass pipe sections located outside the housing of the water module 300, such as the bypass pipe section connecting the distributor 900 and the collector 800 of the heat pump system 1. Furthermore, the valve device 700 is not limited to bypass pipe sections located outside the housing of the water module 300; the valve device 700 can also be... FIG. 9 The water module 300 shown is internally configured. More specifically, water piping P302 connects the refrigerant-water heat exchanger 310 to a water pump (not shown). Water piping P302 includes an inlet pipe section connected to the inlet of the refrigerant-water heat exchanger 310; a connecting pipe section (not shown) connected to the outlet of the refrigerant-water heat exchanger 301, which is connected to the inlet of the water pump; an outlet pipe section connected to the outlet of the water pump; and a water inlet pipe section for the water pump. A bypass pipe section connecting the inlet and outlet (bypass) is provided. Valve device 700 is installed on this bypass pipe section located inside the housing of water module 300 in the water piping P302. Its inlet (inflow channel 711) is connected to the outlet of the water pump, and its outlet (outflow channel 712) is connected to the inlet of the water pump. In this case, valve device 700 is normally open, i.e., the guide post 730 is raised relative to the piston 720, and the fluid flow rate and pressure on the inlet side of valve device 700 are...

[0164] When the pressure head is greater than the fluid flow pressure on the outlet side, the fluid flows into the valve device 700 from the inflow channel 711, pushes open the cylinder plug 720, and flows out from the outflow channel 712.

[0165] Regarding the working principle of valve device 700, regardless of how valve device 700 is... FIG. 9 As shown, it is located inside the housing of the water module 300, or as... FIG. 2 , ​ The valve device 700, located outside the housing of the water module 300, functions to balance the inlet and outlet flow rates of the water pipe P302 (or the water pump outlet) when an imbalance occurs between the liquid flow rates on the inlet section (or outlet) and outlet section (or inlet) of the water pipe P302. Specifically, as shown... ​ As shown, in the case of multiple underfloor heating terminals (underfloor heating water circuit 400), if only one is turned on, the flow rate of liquid circulating in the entire water circuit SH will be relatively small, which can easily lead to an imbalance in the flow rate between the inlet and outlet pipe sections. This may result in a light load on the water pump (i.e., the water pump output is greater than the water pump inflow), thus affecting the operation of the system. By using the valve device 700 of this utility model, the light load phenomenon of the water pump can be avoided, and the reliability of the system operation can be ensured.

[0166] In addition, the valve device 700 is open in the factory state (the exposed guide post 730 is covered by the valve cover 760), and it is not often required to open and close when installed in the heat pump system 1. However, when it is necessary to close the valve device 700, first unscrew the valve cover 760 and use a special tool to turn the guide post 730 to close the gap between the guide post 730 and the cylinder plug 720 that is left in the open state.

[0167] In addition, in the heat pump system 1 of this utility model, the outdoor unit 100 and the water module 300 are set separately, but they can also be set as one unit.

[0168] In a valve device 700 according to one embodiment of the present invention, it is most preferred that the outer peripheral surface of the first segment 731 of the guide post 730 adjacent to the cylinder plug 720, the inner peripheral surface of the cylinder plug 720 adjacent to the first segment 731 of the guide post 730, and at least the portion of the back of the bottom support portion 721 of the cylinder plug 720 that abuts against the valve seat 710, which are in long-term contact with water, are all made of resin. However, the present invention is not limited to this. As long as at least one of the outer peripheral surface of the first segment 731 of the guide post 730 adjacent to the cylinder plug 720 and the inner peripheral surface of the cylinder plug 720 adjacent to the first segment 731 of the guide post 730 is made of resin, the situation of mutual jamming due to corrosion can be improved to a certain extent. That is to say, in the present invention, as long as at least one of the first segment 731 of the guide post 730 and the cylinder plug 720 is made of metal and resin, and the surface of one adjacent to the other is a resin surface, it is acceptable.

[0169] For example, the first segment 731 of the guide post 730 can be a metal base segment 731a made of copper, and the surface (outer peripheral surface) adjacent to the cylinder plug 720 can be made of PPS resin. In this case, the cylinder plug 720 can be made entirely of stainless steel or pure copper (without resin material), or the base 721 and the cylinder plug body 722 can be made of copper, and the surface (inner peripheral surface) adjacent to the first segment 731 of the guide post 730 can be made of PPS resin. Similarly, the cylinder plug 720 can be a base 721 and the cylinder plug body 722 made of copper, and the surface (inner peripheral surface) adjacent to the first segment 731 of the guide post 730 can be made of PPS resin. In this case, the first segment 731 of the guide post 730 can be made entirely of stainless steel or pure copper (without resin material), or the metal base segment 731a can be made of copper, and the surface (outer peripheral surface) adjacent to the cylinder plug 720 can be made of PPS resin. Furthermore, the metal material in this invention is not limited to copper or stainless steel, and the resin material is not limited to PPS. Any suitable metal material and resin material suitable for the valve device can be selected.

[0170] Furthermore, as long as the tensile strength between the metal and resin in the corresponding component is increased, thereby enhancing the component's strength, the holes 731d, 722b, and 721b formed on the corresponding component can be either open or recessed. Preferably, the plurality of holes 731d are arranged in one or more sets at equal angular intervals along the circumferential direction of the cylindrical outer wall surface of the metal base segment 731d. Similarly, the plurality of holes 722b are preferably arranged in one or more sets at equal angular intervals along the circumferential direction of the cylindrical inner wall surface of the cylinder piston body 722.

[0171] In addition, the valve device 700 of this utility model can also be as follows: ​As shown, a limiting groove 741 is provided at the end of the valve body 740 where it connects to the second section 732 of the guide post 730. Using this limiting groove 741, it can be confirmed that the guide post 730 is properly installed simply by visually observing that the upper end of the second section 732 of the guide post 730 is flush with the limiting groove 741. This prevents wear between the first section 731 of the guide post 730 and the cylinder plug 720 caused by excessive downward pressure on the guide post 730.

Claims

1. A valve device, comprising: A valve seat having a flow channel from an inlet channel for fluid inflow to an outlet channel for fluid outflow; a piston and a guide post disposed in the flow channel along the fluid flow path and capable of adjusting the opening and closing of the flow channel, characterized in that... The guide post includes a first section on the side adjacent to the inflow channel and cooperating with the cylinder plug, the first section of the guide post being at least partially housed within the cylinder plug. The first section of the guide post and at least one of the cylinder plug are made of metal and resin, and the surface of one of them adjacent to the other is a resin surface.

2. The valve device as claimed in claim 1, characterized in that, The valve device also has a valve body connected to the valve seat. The guide post further includes a second section made of metal that is connected to the valve body. The middle section of the first segment of the guide post is a metal base segment made of metal. A resin-coated segment made of resin material surrounds the metal base segment of the first segment.

3. The valve device as claimed in claim 2, characterized in that, The first segment's metal base segment is cylindrical, with one end integrally formed with the second segment. A slot is provided at the other end of the metal base section facing the cylinder plug. A portion of the resin-coated section is embedded within the groove.

4. The valve device as described in claim 2 or 3, characterized in that, The cylindrical outer wall of the metal base segment has multiple holes circumferentially formed. A portion of the resin-coated section is embedded in the hole.

5. The valve device as claimed in claim 4, characterized in that, One or more sets of holes are evenly spaced at equal angles on the circumferential direction of the cylindrical outer wall of the metal base segment.

6. The valve device as claimed in claim 2, characterized in that, When the axial length of the first segment formed after the resin-coated segment surrounds the metal base segment is H1, and the axial length of the metal base segment in the first segment is H2, The condition 1 / 3 ≤ H2 / H1 ≤ 2 / 3 is satisfied.

7. The valve device as claimed in claim 1, characterized in that, The cylinder plug for receiving the first section of the guide post has a base portion that abuts against the valve seat on its back and a cylinder plug body that extends cylindrically from the base portion toward the guide post. The cylinder body of the cylinder plug is made of metal. A first resin coating layer made of resin material covers the inner circumferential surface of the cylindrical cylinder plug body.

8. The valve device as claimed in claim 7, characterized in that, The base of the cylinder plug is made of metal. The back of the base of the cylinder plug, at least the portion abutting the valve seat, is provided with a second resin coating layer made of resin material.

9. The valve device as claimed in claim 2, characterized in that, A limiting groove is provided at the end of the connection between the valve body and the second section of the guide post.

10. A water module, the water module comprising: The housing contains a refrigerant-water heat exchanger, which is connected to refrigerant piping and water piping. In the refrigerant-water heat exchanger, the refrigerant flowing through the refrigerant piping exchanges heat with the water flowing through the water piping. as well as A water pump, which is connected to the refrigerant-water heat exchanger via water piping, Its features are, The water piping includes: an inlet pipe section connected to the inlet end of the refrigerant-water heat exchanger; a connecting pipe section connected to the outlet end of the refrigerant-water heat exchanger, the connecting pipe section being connected to the inlet of the water pump; an outlet pipe section connected to the outlet of the water pump; and a bypass pipe section connecting the inlet and outlet of the water pump, wherein the bypass pipe section is located inside the housing. The bypass section of the water piping is provided with a valve device according to any one of claims 1 to 9.

11. A water module, the water module comprising a housing, a refrigerant-water heat exchanger disposed within the housing, a refrigerant pipe and a water pipe connected to the refrigerant-water heat exchanger, wherein refrigerant flowing through the refrigerant pipe and water flowing through the water pipe exchange heat in the refrigerant-water heat exchanger. Its features are, The water piping includes: an inlet pipe section connected to the inlet end of the refrigerant-water heat exchanger; an outlet pipe section connected to the outlet end of the refrigerant-water heat exchanger; and a bypass pipe section connecting the inlet pipe section and the outlet pipe section. The inlet pipe section, the outlet pipe section, and the bypass pipe section are located outside the housing. The bypass section of the water piping is provided with a valve device according to any one of claims 1 to 9.

12. A heat pump system, characterized in that, Includes the water module as described in claim 10 or 11.

Images