Valve device, water module, and heat pump system

Abstract

The utility model discloses a valve device, a water module and a heat pump system. Impurities intercepted (filtered) by a filtering assembly can be prevented from flowing back. The valve device is arranged in a water loop, is used for water treatment and comprises a three-way valve body, the three-way valve body is provided with a first port and a second port which are sequentially arranged in the inflow direction, and the first port and the second port form a first channel; the second channel is communicated with the middle of the first channel in a crossed mode, a third port is formed in the end of the second channel, and a filtering assembly is arranged in the three-way valve body and used for filtering fluid flowing from the first port to the second port. The end cover is arranged outside the third port of the three-way valve body, and an impurity collecting cavity is formed in the end cover; and the anti-backflow piece is mounted in the end cover and is arranged between the filtering assembly in the three-way valve body and the impurity collecting cavity of the end cover.

Description

TECHNICAL FIELD

[0001] The utility model relates to the valve device for use in heat pump system, water module provided 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 to satisfy people's demand for indoor heating.

[0003] In recent years, plate heat exchanger is widely used in water module, because plate heat exchanger has more stringent requirement for water quality, therefore, it is necessary to use the filter screen of 40 mesh or more to filter out the small impurities in water.

[0004] In prior art, a valve device with improved impact resistance and reduced deformation and damage of filter screen is designed.

[0005] Below, referring to Figure 11 , the prior art valve device (water supply valve) 700' is described.

[0006] As shown in Figure 11 , Chinese utility model patent CN 118874057A discloses a valve device 700' provided outside the shell of water module has a three-way valve body 710' and a handle 720', the three-way valve body 710' has first port 710A'

[0007] and second port 710B' arranged in sequence along the water inlet flow direction, the first port 710A' and the second port 710B' form a first channel T1', and the three-way valve body 710' has a second channel T2' intersecting with the first channel T1'

[0008] halfway, the end of the second channel T2' has a third port 710C'. In addition, the intersection of the first channel T1'

[0009] and the second channel T2' in the valve cavity 711' of the three-way valve body 710' is provided with a spherical valve core 712', and the handle 720'

[0010] rotates the valve core 712' to switch on and off the first channel T1'.

[0011] The prior art valve device (water supply valve) 700' is provided with a filter assembly 10' in the valve cavity 711' of the three-way valve body 710', for intercepting impurities in the fluid flowing in the first channel T1', the impurities are accumulated at the third port 710C' corresponding to the three-way valve body 710', and are cleaned out of the valve device (water supply valve) 700 through the opening at the bottom end of the filter screen support 20' of the filter assembly 10' which is opened only when the impurities are cleaned.

[0012] However, the impurities are cleaned periodically, and if a large amount of impurities has accumulated and not cleaned before the cleaning period, the existing valve device (water supply valve) 700' can cause the impurities to flow backward into the fluid during use.

[0013] Therefore, there is an urgent need to find a valve device that can prevent the impurities intercepted (filtered) by the filter assembly from flowing backward. Utility model content

[0014] The utility model is made to solve the prior art problems, and aims at providing a valve device that can prevent the impurities intercepted (filtered) by the filter assembly from flowing backward.

[0015] Another purpose of the utility model is to provide a water module provided with the valve device.

[0016] Still another purpose of the utility model is to provide a heat pump system comprising the aforementioned water module.

[0017] In order to achieve the purpose of the utility model, a valve device is provided, which is arranged in a water circuit and used for treating a fluid flowing in the water circuit, and comprises a three-way valve body, the three-way valve body has a first port and a second port arranged in sequence along a water inflow direction, the first port and the second port form a first channel, a second channel is cross-connected with the first channel at the middle, and the end of the second channel has a third port, a filter assembly is arranged in the three-way valve body and used for filtering the fluid flowing from the first port to the second port, and the valve device further comprises an impurity collecting part, the impurity collecting part has an end cover connected with the third port of the three-way valve body and forming an impurity collecting cavity in the inside of the end cover, and an anti-backflow member is installed in the end cover and arranged between the filter assembly in the three-way valve body and the impurity collecting cavity of the end cover.

[0018] According to the above structure, the impurity collecting part can collect the impurities intercepted (filtered) by the filter assembly into the impurity collecting cavity, and the anti-backflow member arranged between the filter assembly and the impurity collecting cavity can prevent the impurities intercepted (filtered) by the filter assembly from flowing backward, thereby ensuring the filtering effect of the valve device for a long time, avoiding the impurities passing through the valve device and entering the water module, improving the water inflow cleanliness, and ensuring the reliability of the operation of the water module and the entire heat pump system.

[0019] Preferably, the filter assembly is cylindrical and has an impurity outlet at the bottom end that communicates with the impurity collection section located at the third port of the three-way valve body. An impurity collection port is formed on the side of the end cap near the three-way valve body, and the impurity collection port is correspondingly provided with the impurity outlet.

[0020] Furthermore, the filter assembly may or may not have a filter support. When the filter assembly does not have a filter support but includes a filter screen cylindrically disposed inside the three-way valve body along the axial direction, the filter screen includes an intermediate filtration section and an outer peripheral section located around the outer periphery of the intermediate filtration section. In this case, it is preferable that the circumferential dimension of the impurity collection port is greater than the circumferential dimension of the intermediate filtration section of the filter screen and less than or equal to the circumferential dimension of the outer peripheral section of the filter screen. On the other hand, when the filter assembly includes a filter screen support that is integrally cylindrical along the axial direction and includes a filter screen disposed along the axial direction and supported by the filter screen support, it is preferable that the circumferential dimension of the impurity collection port is greater than the inner peripheral dimension of the filter screen support and less than or equal to the outer peripheral dimension of the filter screen support.

[0021] Based on the configuration described above, the impurities substantially filtered by the filter assembly, that is, those filtered by (for example)

[0022] Impurities intercepted by the (cylindrical) filter screen or the middle filtration section of the filter screen can all enter the impurity collection chamber of the end cap through the impurity collection port, thus improving the impurity collection rate.

[0023] Additionally, the filter assembly includes a filter support, which is generally cylindrical in shape and elongated along the axial direction. The filter support has fluid inlets and outlets facing each other on its circumferential sides around the axial direction, allowing fluid to flow in and out relative to the filter support. The fluid inlet corresponds to the first port, and the fluid outlet corresponds to the second port. As a feasible option, a partition plate can be provided between the fluid inlet and the fluid outlet. This partition plate, in the direction of the second channel, includes: a baffle portion corresponding to the positions of the fluid inlet and the fluid outlet, respectively, for blocking fluid flow; and a filter portion other than the baffle portion, allowing fluid to flow through. Alternatively, a backflow baffle extending towards the second channel can be provided on the inner edge of the fluid inlet.

[0024] By providing the partition plate as one of the possible solutions, the fluid entering through the fluid inlet is blocked by the blocking plate portion of the partition plate, and by changing the path of the fluid from the fluid inlet to the fluid outlet from the original straight flow channel to a substantially U-shaped flow channel, the collection rate of the impurities can be further improved and the impurities can more easily enter the impurity collection cavity of the impurity collection portion along the second channel. In addition, by providing the partition plate as another possible solution, the impurities entering the filter assembly and collected by the impurity collection portion can be prevented from flowing backward at the fluid inlet of the filter assembly.

[0025] In addition, as one example of the backflow prevention member, the backflow prevention member can include a frame portion that cooperates with the edge of the impurity collection port, a guide portion that is integrally formed with the frame portion and extends toward the middle and toward the inside of the impurity collection cavity, and an impurity inlet through which the impurities pass.

[0026] According to the above configuration, the impurities entering from the impurity collection port can easily enter the impurity collection cavity from the impurity inlet under the guidance of the guide portion. In addition, in this example, it is preferable that the circumferential dimension thereof be much smaller than the circumferential dimension of the impurity collection cavity, and thus the impurities collected in the impurity collection cavity are blocked by the guide portion and are not easily discharged from the impurity collection cavity through the impurity inlet, so that the impurities are not easily subjected to backflow.

[0027] As another example of the backflow prevention member, the backflow prevention member can also include a frame portion that cooperates with the edge of the impurity collection port, and a backflow prevention sheet that is provided on the frame portion and is made of a flexible material, the frame portion being composed of a circumferential frame portion and a plurality of support bars that are integrally formed with the circumferential frame portion and converge at a central portion of the frame portion, a plurality of slits being formed in the backflow prevention sheet corresponding to the plurality of support bars of the frame portion, the plurality of slits converging at the center of the backflow prevention sheet corresponding to the central portion of the frame portion, and the sheet material of the backflow prevention sheet between two adjacent slits becoming an impurity inlet portion that can be automatically opened by water pressure.

[0028] According to the above configuration, since the sheet material of the backflow prevention sheet between two adjacent slits becomes an impurity inlet portion that can be automatically opened by water pressure, under the action of water pressure, water with impurities enters the impurity collection cavity, and the fluid after entering the impurity collection cavity no longer has water pressure sufficient to open the impurity inlet portion of the backflow prevention sheet, and thus the impurities will not flow backward from the impurity inlet portion. In addition, the backflow prevention sheet made of a flexible material can not only play a sealing role to some extent, but also prevent the impurities from escaping between the third port of the three-way valve body and the impurity collection cavity of the impurity collection portion.

[0029] Further, it is also possible to provide a cleaning port at the bottom of the impurity collecting cavity of the impurity collecting part, and a plug is provided at the cleaning port.

[0030] According to the above configuration, the plug is opened to pour out the impurities collected in the impurity collecting cavity during cleaning, thereby facilitating disassembly and easily completing the cleaning of the impurities.

[0031] Further, by forming the inner wall surface of the impurity collecting cavity into a slope inclined towards the cleaning port, the cleaning of the impurities can be further facilitated, and the backflow of the impurities from the impurity collecting cavity can be prevented.

[0032] Further, the valve device of the utility model is preferably used as a water supply valve provided on the water inlet pipe section of the water module, and the valve device desirably integrates the water path opening and closing function, the water filtering function and the impurity backflow prevention function, wherein the water path opening and closing function can be used to adjust the opening and closing of the water path; in addition, the water filtering function and the impurity backflow prevention function can reliably ensure the water quality entering the refrigerant-water heat exchanger. In addition, when the heat pump system fails, needs low temperature protection or needs cleaning, the water module needs to be drained, and at this time, it is possible to further integrate the drainage function in the valve device. For example, a drainage assembly can be provided at a position close to the second port of the first channel of the three-way valve body and in communication with the first channel. Specifically, the drainage assembly comprises a first pipe section connected with the first channel, a valve rod for adjusting the opening and closing of the drainage assembly is arranged in the first pipe section, a valve cap of the drainage assembly is arranged at the outer end of the first pipe section, and a second pipe section for drainage is cross-connected with the first pipe section. At this time, the second pipe section can directly drain water or can be connected with a water pipe for drainage. In addition, since the valve device is arranged on the water inlet pipe section of the water module at this time, it is typically arranged below the water module, and the water inlet direction is from the lower part to the upper part. In order to efficiently drain the water module, the drainage direction is desirably from the upper part to the lower part (including the obliquely lower part), and therefore, it is preferred that the drainage flow direction of the second pipe section of the drainage assembly is opposite to the water inlet flow direction in the first channel.

[0033] In order to achieve another purpose of the utility model, a water module is provided, which comprises a shell, a refrigerant-water heat exchanger is arranged in the shell, the refrigerant

[0034] - a refrigerant pipe and a water pipe are connected to a refrigerant-water heat exchanger in which refrigerant flowing through the refrigerant pipe exchanges heat with water flowing through the water pipe, characterized in that the water pipe comprises a water inlet pipe section connected to a water inlet end of the refrigerant-water heat exchanger, and the aforementioned valve device is arranged on the water inlet pipe section.

[0035] The valve device can be arranged on the water inlet pipe section of the water circuit in such a way that the first passage of the three-way valve body is horizontal, or in such a way that the first passage of the three-way valve body is inclined so that the impurity collection part is located lower and the filter assembly is located higher, or in such a way that the first passage of the three-way valve body is vertical so that the impurity collection part and the filter assembly are located at the same level. When the first passage of the three-way valve body is horizontal, it is preferable that the second pipe section of the water drainage assembly of the valve device is arranged horizontally, or is arranged downwardly inclined or vertically downwardly relative to the horizontal plane, thereby facilitating the improvement of the drainage speed and the cleanliness of the drainage, and preventing water from remaining in the water module during drainage.

[0036] In the water module of the present application, the valve device arranged on the water inlet pipe section can be located outside the housing of the water module, or inside the housing of the water module.

[0037] In addition, the aforementioned valve device can be used as a water supply valve arranged on the water inlet pipe section of the water module, or as a water outlet valve arranged on the water outlet pipe section of the water module. That is, the water module of the present application can also comprise a water outlet pipe section connected to a water outlet end of the refrigerant-water heat exchanger, and the aforementioned valve device is arranged on the water outlet pipe section.

[0038] In order to achieve another object of the present application, a heat pump system is provided, characterized in that it comprises the aforementioned water module.

[0039] According to the above configuration, backflow of impurities intercepted (filtered) by the filter assembly can be prevented, thereby ensuring the filtering effect of the valve device for a long time, avoiding the entry of impurities into the water module through the valve device, improving the cleanliness of the water inlet, and ensuring the reliability of the operation of the water module and the entire heat pump system. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 is a circuit diagram of the water module of the present application, in which a water supply valve (valve device), a water outlet valve, and a water replenishment valve are arranged on the water circuit and connected to a water circuit for floor heating, a water tank, and a fan coil circuit.

[0041] Figure 2A and Figure 2B is a circuit diagram of the water module of the present application, in which a water supply valve (valve device), a water outlet valve, and a water replenishment valve are arranged on the water circuit and connected to a water circuit for floor heating, a water tank, and a fan coil circuit. Figure 1Fig. 2 is a diagram showing the structure of a water supply valve (valve device) provided in the water module shown in Fig. 1, wherein Figure 2A Fig. 3 is a sectional view showing the water supply valve (valve device). Figure 2B Fig. 4 is a perspective view showing the water supply valve (valve device).

[0042] Figure 3 Fig. 5 is a diagram showing a filter screen support of a filter assembly provided in the water supply valve shown in Fig. 1. Figure 2A Fig. 6 is a diagram showing a filter screen support of a filter assembly provided in the water supply valve shown in Fig. 1. Fig. 7 is a diagram showing a filter screen support of a filter assembly provided in the water supply valve shown in Fig. 1.

[0043] Fig. 8 is a diagram showing a filter screen support of a filter assembly provided in the water supply valve shown in Fig. 1. Figure 4 Fig. 9 is a side perspective view of the filter assembly viewed from the side. Fig. 10 is a diagram showing a filter assembly provided in the water supply valve shown in Fig. 1, viewed from the bottom end.

[0044] Fig. 11 is a diagram showing a filter assembly provided in the water supply valve shown in Fig. 1, viewed from the bottom end. Figure 5A Fig. 12 is a diagram showing a modification of the filter assembly, which is Figure 2A Fig. 13 is a diagram showing a modification of the filter assembly, which is Fig. 14 is a diagram showing a modification of the filter assembly, which is

[0045] Fig. 15 is a diagram showing a modification of the filter assembly, which is Figure 5B Fig. 16 is a diagram showing a modification of the filter assembly, which is Figure 5A Fig. 17 is a diagram showing a modification of the filter assembly, which is Fig. 18 is a diagram showing a modification of the filter assembly, which is

[0046] Fig. 19 is a diagram showing a modification of the filter assembly, which is Figure 6A Fig. 20 is a diagram showing a modification of the filter assembly, which is Fig. 21 is a diagram showing a modification of the filter assembly, which is

[0047] Fig. 22 is a diagram showing a modification of the filter assembly, which is Figure 6B Fig. 23 is a diagram showing a modification of the filter assembly, which is Fig. 24 is a diagram showing a modification of the filter assembly, which is

[0048] Fig. 25 is a diagram showing a modification of the filter assembly, which is Figure 6C Fig. 26 is a diagram showing a modification of the filter assembly, which is Figure 6A Fig. 27 is a diagram showing a modification of the filter assembly, which is Figure 6B Fig. 28 is a diagram showing a modification of the filter assembly, which is Fig. 29 is a diagram showing a modification of the filter assembly, which is

[0049] Fig. 30 is a diagram showing a modification of the filter assembly, which is Figure 6D Fig. 31 is a diagram showing a modification of the filter assembly, which is Figure 2A Fig. 32 is a diagram showing a modification of the filter assembly, which is Figure 6C Fig. 33 is a diagram showing a modification of the filter assembly, which is Fig. 34 is a diagram showing a modification of the filter assembly, which is

[0050] Fig. 35 is a diagram showing a modification of the filter assembly, which is Figure 7A Fig. 36 is a diagram showing a modification of the filter assembly, which is Figure 6B Fig. 37 is a diagram showing a modification of the filter assembly, which is Fig. 38 is a diagram showing a modification of the filter assembly, which is

[0051] Fig. 39 is a diagram showing a modification of the filter assembly, which is Figure 7B Fig. 40 is a diagram showing a modification of the filter assembly, which is Figure 7A Fig. 41 is a diagram showing a modification of the filter assembly, which is Fig. 42 is a diagram showing a modification of the filter assembly, which is

[0052] Fig. 43 is a diagram showing a modification of the filter assembly, which is Figure 7C Fig. 44 is a diagram showing a modification of the filter assembly, which is Figure 7A Fig. 45 is a diagram showing a modification of the filter assembly, which is Fig. 46 is a diagram showing a modification of the filter assembly, which is

[0053] Fig. 47 is a diagram showing a modification of the filter assembly, which is Figure 8is a circuit diagram representing a circuit structure of a heat pump system of the utility model including a water module provided with the water supply valve.

[0054] Figure 9 is a circuit diagram representing another circuit structure of a heat pump system of the utility model including a water module provided with the water supply valve.

[0055] Figure 10 is a schematic diagram showing the flow of fluid in another modification of the filter assembly shown in Figure 3

[0056] Figure 11 is a diagram for explaining the existing valve device (water supply valve).

[0057] (Symbol explanation)

[0058] 10 filter assembly;

[0059] 20 filter screen support;

[0060] 21 circumferential side;

[0061] 21a fluid inlet;

[0062] 21b fluid outlet;

[0063] 21c flow guide part;

[0064] 21d backflow baffle;

[0065] 21dA partition plate;

[0066] 21dA1 blocking plate part;

[0067] 21dA2 filter plate part;

[0068] 22 impurity flow outlet;

[0069] 23 top plate;

[0070] 24 fixing ring;

[0071] 24a limiting protrusion;

[0072] 30 filter screen;

[0073] 31 intermediate filter part;

[0074] 32 outer peripheral part;

[0075] X axis line direction;

[0076] X1 first end (bottom end);

[0077] X2 second end (top end); ​

[0078] 100 outdoor unit;

[0079] 110 compressor;

[0080] Po compressor discharge pipe;

[0081] Pi compressor suction pipe;

[0082] 120 outdoor-side heat exchanger;

[0083] V11 valve;

[0084] 130 liquid accumulator;

[0085] VF1 four-way switching valve;

[0086] a first port;

[0087] b second port;

[0088] c third port;

[0089] d fourth port;

[0090] P1 first connection pipe;

[0091] P2 second connection pipe;

[0092] P3 third connection pipe;

[0093] P4 fourth connection pipe;

[0094] P101 first outdoor-side pipe;

[0095] P102 second outdoor-side pipe;

[0096] VC1 first shutoff valve;

[0097] VC2 second shutoff valve;

[0098] VC3 third shutoff valve;

[0099] VC4 fourth shutoff valve;

[0100] 200 indoor unit;

[0101] V21 valve;

[0102] 210 first indoor-side heat exchanger;

[0103] V22 valve;

[0104] 220 second indoor-side heat exchanger;

[0105] 230 indoor air blowing device;

[0106] P201 first indoor-side pipe;

[0107] P202 second room inner side pipe

[0108] 300 water module

[0109] 310 refrigerant-water heat exchanger

[0110] V31 valve

[0111] P301 refrigerant pipe

[0112] P302 water pipe

[0113] P302A water inlet pipe section

[0114] SH water circuit

[0115] P3021 main pipe

[0116] P3022 branch pipe

[0117] 400 water circuit for floor heating

[0118] P401 water pipe for floor heating

[0119] VF2 three-way valve

[0120] SX water tank

[0121] P501 water inlet pipe

[0122] P502 domestic water pipe

[0123] 510 domestic water terminal

[0124] 600 fan coil circuit

[0125] P601 water pipe for fan coil circuit

[0126] 700 water supply valve (valve device)

[0127] 710 three-way valve body

[0128] 710A first port

[0129] 710B second port

[0130] 710C third port

[0131] 710C1 fixed step

[0132] 711 valve cavity

[0133] 712 valve core

[0134] 720 handle

[0135] 730 impurity collecting part;

[0136] 731 end cap;

[0137] 7311 connecting section;

[0138] 7312 collecting section;

[0139] 731a impurity collecting cavity;

[0140] 731a1 cleaning port;

[0141] 731b impurity collecting port;

[0142] 732 backflow prevention member;

[0143] 732a frame part;

[0144] 732b guide part;

[0145] 732c impurity inlet;

[0146] 732A backflow prevention member;

[0147] 732Aa frame part;

[0148] 732Aa1 circumferential frame part;

[0149] 732Aa2 support strip;

[0150] 732Aa3 center part;

[0151] 732Ab backflow prevention sheet;

[0152] 732Ab1 slit;

[0153] 732Ab2 center;

[0154] 732Ab3 impurity inlet part;

[0155] 733 plug;

[0156] 740 drain assembly;

[0157] 741 first pipe section;

[0158] 741a valve stem;

[0159] 741b valve cap;

[0160] 742 second pipe section;

[0161] T1 first passage;

[0162] T2 second passage;

[0163] 800 water outlet valve;

[0164] 900 make-up water valve DETAILED DESCRIPTION

[0165] Hereinafter, first referring to Figure 1 The water circuit structure of the water module 300 connected to the water end is explained. Figure 1 is a circuit diagram of the water module 300 of the present application, wherein a water supply valve (valve device) 700, a water outlet valve 800 and a make-up water valve 900 are provided on the water circuit SH and connected to a water circuit for floor heating 400, a water tank SX and a fan coil circuit 600.

[0166] Figure 1 The water module 300 as shown is a water module comprising a casing (not shown),

[0167] A refrigerant-water heat exchanger 310 is provided in the casing. The refrigerant-water heat exchanger 310 is, for example, one of a plate heat exchanger and a tube-in-tube 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, the refrigerant flowing through the refrigerant pipe P301 and the water flowing through the water pipe P302 are heat-exchanged. It is preferable that the fluid in the water pipe P302 of the water circuit SH flows in the direction of the solid arrow shown in the drawing, but it can also flow in the opposite direction.

[0168] As shown in Figure 1As shown, a water supply valve 700 is provided on a water pipe P302 of a water circuit SH of the water module 300, and a water circuit 400 for floor heating, a water tank SX, and a 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 having two ends connected 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 water terminals 510 such as faucets and shower heads 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 having two ends connected 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 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 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 module 300 is used in a water heating mode, the water circuit 400 for floor heating and the water tank SX can be omitted. Figure 1 In the structure shown, only any one or two of the water circuit 400 for floor heating, the water tank SX (including 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, and the water terminals 510 for domestic water), and the fan coil circuit 600 can be connected to the water circuit SH of the water module 300.

[0169] 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. The water supply valve 700 is provided on the water inlet pipe section, and the water outlet valve 800 is provided on the water outlet pipe section.

[0170] (Water supply valve (valve device) 700)

[0171] Hereinafter, the case where the valve device is used as the water supply valve 700 will be described.

[0172] Next, the structure of the water supply valve (valve device) 700 provided in the water module 300 shown in Figure 2A Figure 2B will be described. Figure 1

[0173] The water supply valve 700 provided on the water inlet pipe section P302A of the water pipe P302 connected to the water inlet end of the refrigerant-water heat exchanger 310 is preferably provided outside the housing of the water module 300 so as to facilitate maintenance thereof, and is provided on the water inlet pipe section P302A of the water pipe P302 connected to the water inlet end of the refrigerant-water heat exchanger 310.​​Figure 2A 、 Figure 2B The three-way valve body 710, the handle 720, and the impurity collection portion 730 are shown.

[0174] The three-way valve body 710 has a first port 710A and a second port 710B disposed in this order along the water inflow direction, and the first port 710A and the second port 710B form a first passage T1. In addition, the three-way valve body 710 has a second passage T2 that communicates with the middle of the first passage T1, and the end portion of the second passage T2 has a third port 710C.

[0175] In the present application, the three-way valve body 710 can be either a T-shaped three-way valve body, that is, a three-way valve body in which the second passage T2 is perpendicular to the first passage T1, or a Y-shaped three-way valve body, that is, a three-way valve body in which the second passage T2 is not perpendicular to the first passage T1. In addition, in the case where the three-way valve body 710 is a Y-shaped three-way valve body, it is more preferable that the end portion of the second passage T2 have the third port 710C on the upstream side of the water inflow direction from the communication portion at which the second passage T2 and the first passage T1 intersect, that is, on the first port 710A side.

[0176] A filter assembly 10 is also provided in the valve cavity 711 of the three-way valve body 710, and is used to intercept impurities in the fluid flowing in the first passage T1.

[0177] In addition, a spherical valve core 712 is provided in the three-way valve body 710, and more specifically, at the intersection of the first passage T1 and the second passage T2 in the valve cavity 711, and the valve core 712 is rotated by the handle 720 to switch the on-off of the first passage T1.

[0178] The impurity collection portion 730 is connected to the third port 710C of the three-way valve body 710, and is used to collect impurities that are intercepted (filtered) by the filter assembly 10. In addition, the connection between the impurity collection portion 730 and the third port 710C can be either a connection in which the outer peripheral portion of the impurity collection portion 730 is fitted from the outside over the outer peripheral wall of the third port 710C of the three-way valve body 710 as shown in the drawing, a connection in which a portion of the impurity collection portion 730 that is located in the middle is fitted into the inner peripheral wall of the third port 710C of the three-way valve body 710, or a connection in which the outer end surface of the impurity collection portion 730 opposes the outer end surface of the third port 710C of the three-way valve body 710, for example, and is connected by a fastener through a gasket, as long as the purpose of connecting the third port from which impurities intercepted by the filter assembly 10 flow out of the three-way valve body 710 to the impurity collection portion 730 used to collect impurities is not violated, and the connection method is not particularly limited. Figure 2A In addition, the impurity collection portion 730 is connected to the third port 710C of the three-way valve body 710, and is used to collect impurities that are intercepted (filtered) by the filter assembly 10. In addition, the connection between the impurity collection portion 730 and the third port 710C can be either a connection in which the outer peripheral portion of the impurity collection portion 730 is fitted from the outside over the outer peripheral wall of the third port 710C of the three-way valve body 710 as shown in the drawing, a connection in which a portion of the impurity collection portion 730 that is located in the middle is fitted into the inner peripheral wall of the third port 710C of the three-way valve body 710, or a connection in which the outer end surface of the impurity collection portion 730 opposes the outer end surface of the third port 710C of the three-way valve body 710, for example, and is connected by a fastener through a gasket, as long as the purpose of connecting the third port from which impurities intercepted by the filter assembly 10 flow out of the three-way valve body 710 to the impurity collection portion 730 used to collect impurities is not violated, and the connection method is not particularly limited.

[0179] (Filter assembly 10)

[0180] Next, referring to Figure 3 , Figure 4 and Figure 5A , the structure of the filter assembly 10 provided in the water supply valve 700 shown in Figure 2A will be described. Figure 3 is a schematic perspective view of the filter screen support 20 of the filter assembly 10 provided in the water supply valve 700 shown in Figure 2A , Figure 4 is a side perspective view of the filter assembly 10 viewed from the side, Figure 5A is a schematic structural view of the filter assembly 10 provided in the water supply valve 700 shown in Figure 2A , viewed from the bottom end.

[0181] As shown in Figure 3 and Figure 4 , the filter assembly 10 of the present application comprises a filter screen support 20 which is a cylinder in overall shape and elongated along an axial direction X, and a filter screen 30 provided inside the filter screen support 20 along the axial direction X. In addition, a first end X1 of the axial direction X is referred to as a bottom end, and a second end X2 of the axial direction X is referred to as a top end. The filter screen support 20 can be made of any one of metal and resin which are easy to process, and in the present application, for example, is made of PP resin.

[0182] As shown in Figure 3 , a fluid inlet 21a and a fluid outlet 21b for allowing fluid to flow in and out with respect to the filter screen support 20 are provided on a circumferential side surface 21 of the filter screen support 20 around the axial direction X in a manner facing each other, as shown in Figure 4 , the filter screen 30 is provided between the fluid inlet 21a and the fluid outlet 21b of the filter screen support 20. As shown in Figure 2A , the filter assembly 10 is fitted into the three-way valve body 710 of the water supply valve 700 from a third port 710C of the three-way valve body 710, and the fluid inlet 21a of the filter assembly 10 corresponds to a first port 710A, and the fluid outlet 21b corresponds to a second port 710B. Preferably, as shown in Figure 3 , the upper and lower edges of the fluid inlet 21a and the fluid outlet 21b are flush in height, whereby the flow path structure for allowing fluid to flow is simple, has small resistance and low noise. Further preferably, as shown in Figure 4 , flow guide portions 21c are provided on the edges of the fluid inlet 21a and the fluid outlet 21b, whereby fluid flow is facilitated, and the flow rate is improved. Still further preferably, as shown in Figure 3 , Figure 4As shown, the edge inside of the fluid inlet 21a is provided with a backflow baffle 21d extending towards the second channel T2 (the third port 710C), thereby preventing the impurities entering the filter assembly 10 from backflowing at the fluid inlet 21a of the filter assembly 10, and preventing the impurities from backflowing into the water circuit SH.

[0183] In addition, as shown in Figure 5A As shown, the filter screen support 20 has an impurity outlet 22 at the bottom end, which is in communication with the impurity collecting portion 730 (the impurity collecting port 731b) at the third port 710C of the three-way valve body 710, for allowing the impurities in the water intercepted by the filter screen 30 to flow out of the filter assembly 10 and into the impurity collecting portion 730.

[0184] As shown in Figure 2A , Figure 3 , Figure 4 As shown, the filter screen support 20 has a top plate 23 at the top end, which abuts against the inside of the valve core 712, thereby allowing the impurities passing through the filter screen 30 to fall inside the filter screen support 20 (more specifically, on the top plate 23), and not easily escaping from the pores or deformations of the filter screen 30. Preferably, the end of the filter screen 30 on the top end side is fixedly connected with the top plate 23, and in addition, the two side edges of the filter screen 30 are respectively fixedly connected with the inner walls of the filter screen support 20, thereby allowing the filter screen 30 to be firmly fixed and not easily deformed. In addition, in the present utility model, the top plate 23 can also be omitted.

[0185] In addition, as shown in Figure 3 , Figure 4 As shown, the circumferential side surface 21 of the cylindrical filter screen support 20 near the bottom end is formed with a fixing ring 24, which is interference-fitted with the fixing step 710C1 provided at the third port 710C of the three-way valve body 710. In addition, as shown in Figure 4 Preferably, a limiting protrusion 24a is formed on the fixing ring 24, thereby allowing the installation position of the filter assembly 10 to be positioned, so as to prevent the fluid from not being filtered by the filter screen 30 of the filter assembly 10 or the fluid from not being impacted on the filter screen 30, thereby preventing the filter screen 30 from being abnormally deformed or even damaged.

[0186] As shown in Figure 4As shown in Figure 5, the filter screen 30 is configured in a > shape and positioned on the side near the fluid outlet 21b, with its opening facing the fluid inlet 21a. Furthermore, the included angle at the bend of the >-shaped filter screen 30 is preferably an obtuse angle, and the bend is preferably aligned with the center lines of the fluid inlet 21a and the fluid outlet 21b. This facilitates increasing the filtration area and improving the filtration effect. However, the shape of the filter screen 30 is not limited to > shape; it can also be any of the following: 〕, |, or <> shape. The opening of the 〕-shaped filter screen 30 faces the fluid inlet 21a, while in the <>-shaped filter screen 30, the bend of the < is preferably aligned with the center line of the fluid inlet 21a, and the bend of the > is aligned with the center line of the fluid outlet 21b.

[0187] The filter assembly 10 of this invention is partially disposed inside the valve core 712 located at the intersection of the first channel and the second channel. More specifically, as shown... Figure 2A As shown, the portion of the filter support 20 of the filter assembly 10 near the top is disposed inside the valve core 712 located at the intersection of the first channel and the second channel. Furthermore, it is preferable that the gap between the outer wall of the filter support 20 and the inner wall of the valve core 712 is less than or equal to the minimum pore size of the filter screen 30.

[0188] (Impurity Collection Section 730)

[0189] Next, refer to Figure 6A , Figure 6B , Figure 6C and combined Figure 2A , Figure 6D The structure of the impurity collection section 730 will be explained. Figure 6A It constitutes Figure 2A A schematic perspective view of the end cap 731 of the impurity collection section 730 shown. Figure 6B It constitutes Figure 2A A schematic perspective view of the anti-backflow component 732 of the impurity collection section 730 shown. Figure 6C yes Figure 6A The end cap 731 shown is Figure 6B The diagram shows a perspective view of the impurity collection section 730 after the anti-backflow component 732 is assembled. Figure 6D yes Figure 2A The filter assembly 10 shown is Figure 6C The diagram shows a schematic perspective view of the assembled impurity collection unit 730.

[0190] like Figure 6C As shown, the impurity collection section 730 includes an end cap 731 and Figure 6B The anti-backflow component 732 is shown.

[0191] like Figure 6AAs shown, the end cap 731 is sleeved on the outer peripheral wall of the third port 710C of the three-way valve body 710 from the outside, and an impurity collection cavity 731a is formed in the interior of the end cap 731.

[0192] As an example, the end cap 731 comprises a connecting section 7311 and a collection section 7312, the end cap 731 is connected with the third port 710C (for example, threaded) through the connecting section 7311, and an impurity collection port 731b for the impurities intercepted (filtered) by the filtering assembly 10 to enter the impurity collection cavity 731a is formed on the side of the three-way valve body 710 (the filtering assembly 10) of the end cap 731 (more specifically, the joint of the connecting section 7311 and the collection section 7312), which corresponds to the impurity flow port 22 formed at the bottom end of the screen support 20 shown in FIG. 5. The circumferential dimension of the impurity collection port 731b formed in the end cap 731 is equivalent to the circumferential dimension of the impurity flow port 22 formed at the bottom end of the screen support 20. For example, in an example of the present application, as shown in FIG. 6, the impurity collection port 731b is formed in the end cap 731, and the impurity flow port 22 is formed at the bottom end of the screen support 20. Figure 5A As shown, since the filtering assembly 10 comprises the screen support 20 which is a cylinder along the axial direction, and comprises the (for example, >-shaped) screen 30 which is arranged along the axial direction and supported by the screen support 20, it is preferred that, as shown, Figure 2A As shown, the circumferential dimension of the impurity collection port 731b is set to be greater than the inner peripheral dimension of the screen support 20, and less than or equal to the outer peripheral dimension of the screen support 20. However, in the present application, the filtering assembly 10 can also not have the screen support, that is, as shown, Figure 5B As shown, the filtering assembly 10 only comprises the screen 30 which is a cylinder along the axial direction and arranged in the interior of the three-way valve body 710, the screen 30 comprises the intermediate filtering part 31 and the outer peripheral part 32 located at the outer periphery of the intermediate filtering part 31, at this time, it is preferred that the circumferential dimension of the impurity collection port 731b is set to be greater than the circumferential dimension of the intermediate filtering part 31 of the screen 30, and less than or equal to the circumferential dimension of the outer peripheral part 32 of the screen 30. In this way, the impurities substantially filtered by the filtering assembly 10, that is, the impurities intercepted by the (for example, >-shaped) screen 30 or the intermediate filtering part 31 of the (cylindrical) screen 30 can all enter the impurity collection cavity 731a of the end cap 731 through the impurity collection port 731b, thereby improving the collection rate of the impurities.

[0193] As shown, the anti-backflow member 732 is installed in the end cap 731, and is arranged between the filtering assembly 10 arranged in the three-way valve body 710 and the impurity collection cavity 731a of the end cap 731, for example, preferably installed at the inside of the impurity collection port 731b in the impurity collection cavity 731a. Figure 6C

[0194] As an example of the anti-backflow member 732, as shown, Figure 6B ​The illustrated example includes: a frame portion 732a that cooperates with the edge of the impurity collection port 731b; a guide portion 732b that is formed integrally with the frame portion 732a and extends toward the middle and toward the inner side of the impurity collection cavity 731a; and an impurity entry port 732c through which impurities pass, the circumferential dimension of which (far) is smaller than the circumferential dimension of the impurity collection cavity 731a. Thus, impurities that enter from the impurity collection port 731b can easily enter the impurity collection cavity 731a from the impurity entry port 732c under the guidance of the guide portion 732b. In addition, because the guide portion 732b extends toward the middle and toward the inner side of the impurity collection cavity 731a, and the circumferential dimension of the impurity entry port 732c (far) is smaller than the circumferential dimension of the impurity collection cavity 731a, the impurities collected in the impurity collection cavity 731a are blocked by the guide portion 732b and are not easily able to flow out of the impurity collection cavity 731a via the impurity entry port 732c, so that backflow of the impurities is not easily able to occur.

[0195] In addition, in the illustrated example, the backflow prevention member 732 (the frame portion 732a and the guide portion 732b) is made of a flexible material such as rubber, so that it can function as a certain seal while preventing backflow, but the present application is not limited thereto and can also be made of metal or resin. Figure 6B

[0196] As shown in the illustrated example, in the installed state, the frame portion 732a of the backflow prevention member 732 is located outside the impurity collection port 731b, and as shown in the illustrated example, the bottom of the filter assembly 10 is disposed in the connecting section 7311 of the end cover 731 and is in abutment with the backflow prevention member 732. As one example, the bottom frame of the screen support 20 of the filter assembly 10 is in abutment with the frame of the backflow prevention member 732, and as another example, the outer peripheral portion 32 bottom of the screen 30 of the filter assembly 10 is in abutment with the frame of the backflow prevention member 732, and such a configuration can both ensure that impurities enter the collection cavity 731a and prevent impurities from leaking out of the gap. Figure 6C Figure 6D In addition, the backflow prevention member 732 is not limited to the configuration shown in the illustrated example, and in particular, is not limited to the configuration in which the impurity entry port 732c is separately provided, but can also be a backflow prevention member 732 (such as the backflow prevention member 732A shown in the illustrated example) in which the impurity entry port 732c is not separately provided.

[0197] In particular, as shown in the illustrated example, the backflow prevention member 732A includes a frame portion 732Aa that cooperates with the edge of the impurity collection port 731b, and a backflow prevention sheet 732Ab that is provided on the frame portion 732Aa and is made of a flexible material such as rubber. As shown in the illustrated example, the backflow prevention sheet 732Ab is provided on the frame portion 732Aa and is in abutment with the frame portion 732Aa, and the circumferential dimension of the backflow prevention sheet 732Ab (far) is smaller than the circumferential dimension of the impurity collection cavity 731a. Figure 6B Figure 7A

[0198] In particular, as shown in the illustrated example, the backflow prevention member 732A includes a frame portion 732Aa that cooperates with the edge of the impurity collection port 731b, and a backflow prevention sheet 732Ab that is provided on the frame portion 732Aa and is made of a flexible material such as rubber. As shown in the illustrated example, the backflow prevention sheet 732Ab is provided on the frame portion 732Aa and is in abutment with the frame portion 732Aa, and the circumferential dimension of the backflow prevention sheet 732Ab (far) is smaller than the circumferential dimension of the impurity collection cavity 731a. Figure 7A Figure 7B Figure 7C In particular, as shown in the illustrated example, the backflow prevention member 732A includes a frame portion 732Aa that cooperates with the edge of the impurity collection port 731b, and a backflow prevention sheet 732Ab that is provided on the frame portion 732Aa and is made of a flexible material such as rubber. As shown in the illustrated example, the backflow prevention sheet 732Ab is provided on the frame portion 732Aa and is in abutment with the frame portion 732Aa, and the circumferential dimension of the backflow prevention sheet 732Ab (far) is smaller than the circumferential dimension of the impurity collection cavity 731a.​​​​​​Figure 7B As shown, the border portion 732Aa is composed of a circumferential frame portion 732Aa1 and multiple support strips 732Aa2 integrally formed with the circumferential frame portion 732Aa1 and converging at the center portion 732Aa3 of the border portion 732Aa. Additionally, as... Figure 7C As shown, multiple slits 732Ab1 are made on the anti-backflow plate 732Ab, corresponding to the multiple support strips 732Aa2 of the frame portion 732Aa. These slits converge at the center 732Ab2 of the anti-backflow plate 732Ab, corresponding to the center portion 732Aa3 of the frame portion 732Aa. The sheet material of the anti-backflow plate 732Ab between two adjacent slits 732Ab1 becomes an impurity inlet 732Ab3 that can be opened by water pressure. Under the action of water pressure, water containing impurities enters the impurity collection chamber 731a. Since the fluid entering the impurity collection chamber 731a no longer has sufficient water pressure to open the impurity inlet 732Ab3 of the anti-backflow plate 732Ab, the impurities will not flow back from the impurity inlet 732Ab3. In addition, the anti-backflow plate 732Ab, made of flexible material, can not only play a sealing role to a certain extent, but also prevent impurities from escaping between the third port 710C of the three-way valve body 710 and the impurity collection chamber 731a of the impurity collection part 730.

[0199] More specifically, the anti-backflow plate 732Ab is fitted inside the flange of the frame portion 732Aa and is fixedly connected to the frame portion 732Aa by means of adhesive or other methods. Furthermore, the anti-backflow plate 732Ab is closer to the impurity collection chamber 731a than the frame portion 732Aa. This ensures the strength of the anti-backflow component 732A and prevents the anti-backflow plate 732Ab from falling off.

[0200] Furthermore, preferably, as shown in FIG2, a cleaning port 731a1 is provided at the bottom of the impurity collection chamber 731a of the impurity collection section 730, and a plug 733 is provided at the cleaning port 731a1 for opening the plug 733 during cleaning to pour out the impurities collected in the impurity collection chamber 731a. This facilitates disassembly and allows for easy cleaning of impurities. Additionally, it is conceivable to form the inner wall surface of the impurity collection chamber 731a as an inclined surface (not shown) facing the cleaning port 731a1, which further facilitates the cleaning of impurities and prevents backflow of impurities from the impurity collection chamber 731a.

[0201] In addition, the valve device of this utility model is preferably a water supply valve 700 installed on the water inlet pipe section used as the water module 300. The valve device 700 ideally integrates water circuit opening and closing function, water filtration function and impurity backflow prevention function. Among them, the water circuit opening and closing function can be used to regulate the opening and closing of the water circuit; in addition, the water filtration function and impurity backflow prevention function can reliably ensure the water quality entering the refrigerant-water heat exchanger.

[0202] In addition, the heat pump system 1 needs to drain the water module 300 when it fails, needs low temperature protection, needs cleaning, at this time it is conceivable to further integrate the function of draining water in the valve device 700.

[0203] For example, as shown in FIG. 2, the drain assembly 740 in communication with the first channel T1 can be designed to be arranged at a position close to the second port 710B of the three-way valve body 710. The drain assembly 740 can be arranged at any position in the circumferential direction of the second port 710B of the three-way valve body 710.

[0204] Specifically, the drain assembly 740 includes a first pipe segment 741 connected with the first channel T1, a valve rod 741a arranged in the first pipe segment 741 to adjust the switch of the drain assembly 740, and a valve cap 741b of the drain assembly 740 arranged at the outer end of the first pipe segment 741.

[0205] In addition, the drain assembly 740 further includes a second pipe segment 742 for draining water connected with the first pipe segment 741. At this time, the second pipe segment 742 can directly drain water or be connected with a water pipe (not shown) for draining water.

[0206] The water supply valve (valve device) 700 is preferably arranged at the first channel T1 of the three-way valve body 710 on the water inlet pipe segment of the water circuit SH to improve the collection rate of impurities, and the impurities intercepted (filtered) by the filter assembly 10 are not easy to backflow, but the present application is not limited thereto. The valve device can be arranged on the water inlet pipe segment in a manner that the first channel T1 is inclined so that the impurity collection part 730 is located at a low position and the filter assembly 10 is located at a high position, so that the impurities are not easy to backflow, or the valve device can be arranged on the water inlet pipe segment in a manner that the first channel T1 is vertical, so that the impurity collection part 730 and the filter assembly 10 are substantially located at the same horizontal plane, that is, the valve device can be installed at multiple angles.

[0207] In addition, when the valve device is used as the water supply valve 700 arranged on the water inlet pipe section of the water module 300, it is typically arranged below the water module 300, so the water inlet direction (i.e. the water flow direction in the first passage T1) is from the lower part to the upper part. In order to efficiently discharge water from the water module 300, the water discharge direction is desirably from the upper part to the lower part (including the obliquely lower part), so it is conceivable to make the water discharge flow direction of the second pipe section 742 of the water discharge assembly 740 opposite to the water inlet flow direction in the first passage T1. Here, "opposite" is not limited to being directly opposite, i.e. the orientation of the second pipe section 742 is not limited to being parallel to the orientation of the first passage T1, but can be appropriately arranged obliquely outward, which can also facilitate the connection of the water pipe. When the first passage T1 of the three-way valve body 710 is horizontal, it is also conceivable to arrange the second pipe section 742 of the water discharge assembly 740 of the valve device 700 horizontally, or obliquely downward or vertically downward relative to the horizontal plane, so as to facilitate the improvement of the water discharge speed and the clean discharge of water, and the water is not easy to remain in the water module during water discharge. In addition, the installation angle of the valve device 700, such as the inclination angle of the first passage T1 of the valve device 700 relative to the horizontal plane and / or the installation orientation of the second pipe section 742 of the valve device 700, can be adjusted according to the actual installation environment. In addition, the installation angle of the second pipe section 742 relative to the horizontal plane can be changed by rotating the first pipe section 741 perpendicular to the first passage T1 after the valve device 700 is installed, and other any suitable means can be used to flexibly adjust the installation orientation of the second pipe section 742 to facilitate water discharge.

[0208] The above is described by taking the valve device as the water supply valve 700 arranged on the water inlet pipe section of the water module 300 as an example, but the valve device of the present application should not be exclusively interpreted as the water supply valve 700, and it can also be used as the water outlet valve 800 arranged on the water outlet pipe section of the water module 300, or other any applicable valve device, such as the water replenishment valve 900 arranged on the water inlet pipe section at a position more upstream than the water supply valve 700, for replenishing water in the water circuit SH. Figure 1 As shown in the figure, the water replenishment valve 900 is used to replenish water in the water circuit SH. Here, taking the floor heating terminal (floor heating water circuit 400) as an example, in the case of maintenance, cleaning, or system failure, system shutdown, etc. in winter, the water in the water circuit SH is discharged completely or partially, and before the system is started again, the water circuit SH needs to be replenished with water, at which time the water replenishment valve 900 can be opened to replenish the water circuit SH with water.

[0209] Next, first referring to Figure 8 , the circuit structure of the heat pump system 1 of the present application including the water module 300 provided with the aforementioned water supply valve 700 will be described. Figure 8is a circuit diagram showing a circuit structure of a heat pump system 1 of the present application including a water module provided with the above-mentioned water supply valve 700.

[0210] As shown in Figure 8 , the heat pump system 1 of the present embodiment includes an outdoor unit 100, an indoor unit 200 (for example, a three-pipe indoor unit) and a water module 300, which are connected to each other by a plurality of (for example, four) connection pipes.

[0211] The above-mentioned plurality of connection pipes include a first connection pipe P1, a second connection pipe P2, a third connection pipe P3 and a fourth connection pipe P4.

[0212] In the present specification, the three-pipe indoor unit refers to an indoor unit capable of being connected to three connection pipes among the plurality of connection pipes (the first connection pipe P1 to the fourth connection pipe P4) of the heat pump system 1. For example, in the present embodiment, the indoor unit 200 is capable of being connected to the first connection pipe P1, the second connection pipe P2 and the third connection pipe P3 of the heat pump system 1, so as to allow refrigerant to flow between the outdoor unit 100 and the indoor unit 200.

[0213] (outdoor unit 100)

[0214] In addition, in the outdoor unit 100, a compressor 110, an outdoor-side heat exchanger 120, a valve V11, a liquid accumulator 130 and a four-way switching valve VF1 are provided. Further, in the outdoor unit 100, an outdoor air blower 140 for blowing air to the outdoor-side heat exchanger 120 is also provided.

[0215] Specifically, the discharge side of the compressor 110 is connected to one end of a compressor discharge pipe (corresponding to the "discharge pipe" of the present application) Po, the other end of the above-mentioned compressor discharge pipe Po is connected to one end of the first outdoor-side pipe P101 at a point K10 located in the middle of the first outdoor-side pipe P101, and a second outdoor-side pipe P102 is branched from the middle of the above-mentioned compressor discharge pipe Po (at a point K11 located in the middle of the compressor discharge pipe Po) and connected to the above-mentioned compressor discharge pipe Po at one end thereof located at the point K11. Figure 8 Figure 8 Figure 8

[0216] ​​​In addition, the other end of the first outdoor side pipe P101 is connected to the first port a of the four-way switching valve VF1, and the other end of the second outdoor side pipe P102 is connected to the fourth port d of the four-way switching valve VF1. In addition, the second port b of the four-way switching valve VF1 is connected to one end of the second connection pipe P2, and the third port c of the four-way switching valve VF1 is connected to one end of the third connection pipe P3. The above-mentioned four-way switching valve VF1 can be switched between a first switching state and a second switching state, wherein in the first switching state of the above-mentioned four-way switching valve VF1, the four-way switching valve VF1 is switched to make the first port a and the second port b communicate and make the third port c and the fourth port d communicate, thereby making the first outdoor side pipe P101 and the second connection pipe P2 communicate and making the second outdoor side pipe P102 and the third connection pipe P3 communicate, and in the second switching state of the above-mentioned four-way switching valve VF1, the four-way switching valve VF1 is switched to make the first port a and the fourth port d communicate and make the second port b and the third port c communicate, thereby making the first outdoor side pipe P101 and the second outdoor side pipe P102 communicate and making the second connection pipe P2 and the third connection pipe P3 communicate. In addition, the fourth connection pipe P4 is branched from the middle of the second outdoor side pipe P102 (at point K12 in FIG. 1). Figure 8

[0217] On the other hand, the suction side of the compressor 110 is connected to one end of the compressor suction pipe Pi, and the other end of the compressor suction pipe Pi (at point K13 in FIG. 1) is connected to one end of the first connection pipe P1. A liquid accumulator 130 is provided in the middle of the compressor suction pipe Pi. Figure 8

[0218] In addition, the outdoor side heat exchanger 120 and the valve V11 are provided in the middle of the first connection pipe P1, more specifically, in the middle of the part of the first connection pipe P1 located in the outdoor unit 100.

[0219] For the convenience of description, the first connection pipe P1, the second connection pipe P2, the third connection pipe P3, and the fourth connection pipe P4 in the present application each include a part of the pipe located in the outdoor unit 100. In the present embodiment, the first connection pipe P1 includes an outdoor unit side connection pipe and an external connection pipe, which are separated by the first stop valve VC1, without special indication. Hereinafter, the pipe segment between the first stop valve VC1 and point K13 in FIG. 1 is also referred to as the outdoor unit side connection pipe of the first connection pipe P1, and the pipe segment between the first stop valve VC1 and point K14 in FIG. 1 is also referred to as the external connection pipe of the first connection pipe P1. Figure 8 Figure 8 ​​​the point K30 in the first connection pipe P1 is called an outdoor unit 100 side connection pipe. Likewise, the second connection pipe P2 includes an outdoor unit 100 side connection pipe and an external connection pipe, the outdoor unit 100 side connection pipe of the second connection pipe P2 being a pipe segment between the second port b of the four-way switching valve VF1 and the second stop valve VC2, and the external connection pipe of the second connection pipe P2 being a pipe segment between the second stop valve VC2 and Figure 8 the point K21 in the second connection pipe P2. The third connection pipe P3 includes an outdoor unit 100 side connection pipe and an external connection pipe, the outdoor unit 100 side connection pipe of the third connection pipe P3 being a pipe segment between the third port c of the four-way switching valve VF1 and the third stop valve VC3, and the external connection pipe of the third connection pipe P3 being a pipe segment between the third stop valve VC3 and Figure 8 the point K23 in the third connection pipe P3. The fourth connection pipe P4 includes an outdoor unit 100 side connection pipe and an external connection pipe, the outdoor unit 100 side connection pipe of the fourth connection pipe P4 being a pipe segment between the point K12 and the fourth stop valve VC4 in the fourth connection pipe P4, and the external connection pipe of the fourth connection pipe P4 being a pipe segment between the fourth stop valve VC4 and Figure 8 the point K31 in the fourth connection pipe P4. Figure 8

[0220] That is, the first stop valve VC1 is used to connect the portion inside the outdoor unit 100 and the portion outside the outdoor unit 100 of the first connection pipe P1, the second stop valve VC2 is used to connect the portion inside the outdoor unit 100 and the portion outside the outdoor unit 100 of the second connection pipe P2, the third stop valve VC3 is used to connect the portion inside the outdoor unit 100 and the portion outside the outdoor unit 100 of the third connection pipe P3, and the fourth stop valve VC4 is used to connect the portion inside the outdoor unit 100 and the portion outside the outdoor unit 100 of the fourth connection pipe P4.

[0221] In general, the first stop valve VC1, the second stop valve VC2, the third stop valve VC3 and the fourth stop valve VC4 are in an open state. In addition, in some cases, any one or more of the above-mentioned first stop valve VC1 to fourth stop valve VC4, or even all of them, can be omitted.

[0222] (In-Door Unit 200)

[0223] In the in-door unit 200, a valve V21, a first in-door side heat exchanger 210, a valve V22, a second in-door side heat exchanger 220 and an in-door air supply device 230 for sending heat or cold of the in-door unit 200 into a room are provided.

[0224] Specifically, in the middle of the first connection pipe P1 (located between the point K20 and the point K30 in the first connection pipe P1), the second connection pipe P2 (located between the point K21 and the point K22 in the second connection pipe P2), the third connection pipe P3 (located between the point K22 and the point K23 in the third connection pipe P3) and the fourth connection pipe P4 (located between the point K12 and the point K13 in the fourth connection pipe P4), the valves V21 and V22 are provided. Figure 8 ​at the point K20 in the middle of the first indoor-side pipe P201, a valve V21 and a first indoor-side heat exchanger 210 are provided in this order from the one end of the first indoor-side pipe P201 (located Figure 8 at the point K20 in the middle of the first indoor-side pipe P201, a valve V21 and a first indoor-side heat exchanger 210 are provided in this order from the one end of the first indoor-side pipe P201 (located Figure 8 at the point K20 in the middle of the first indoor-side pipe P201, a valve V21 and a first indoor-side heat exchanger 210 are provided in this order from the one end of the first indoor-side pipe P201 (located Figure 8 at the point K21 in the middle of the second indoor-side pipe P202, a valve V22 and a second indoor-side heat exchanger 220 are provided in this order from the one end of the second indoor-side pipe P202 (located

[0225] at the point K20 in the middle of the first indoor-side pipe P201 between the point K20 and the valve V21 (located Figure 8 at the point K22 in the middle of the second indoor-side pipe P202, a valve V22 and a second indoor-side heat exchanger 220 are provided in this order from the one end of the second indoor-side pipe P202 (located Figure 8 at the point K22 in the middle of the second indoor-side pipe P202, a valve V22 and a second indoor-side heat exchanger 220 are provided in this order from the one end of the second indoor-side pipe P202 (located Figure 8 at the point K22 in the middle of the second indoor-side pipe P202, a valve V22 and a second indoor-side heat exchanger 220 are provided in this order from the one end of the second indoor-side pipe P202 (located Figure 8 at the point K23 in the middle of the second indoor-side pipe P202, a valve V22 and a second indoor-side heat exchanger 220 are provided in this order from the one end of the second indoor-side pipe P202 (located

[0226] Here, the first indoor-side heat exchanger 210 and the second indoor-side heat exchanger 220 are provided in the flow path of the air current formed by the indoor air blowing device 230. Further, as the valves V21 and V22, an electric valve or an electromagnetic valve can be used.

[0227] (Water module 300)

[0228] In the water module 300, a refrigerant pipe P301, a water circuit SH constituted by a water pipe P302, and a refrigerant-water heat exchanger 310 that exchanges heat between the refrigerant flowing through the refrigerant pipe P301 and the water flowing through the water pipe P302 are provided. Specifically, one end of the refrigerant pipe P301 (located Figure 8 at the point K30 in the middle of the refrigerant pipe P301, a valve V31 and a refrigerant-water heat exchanger 310 are provided in this order from the one end of the refrigerant pipe P301 (located Figure 8 at the point K30 in the middle of the refrigerant pipe P301, a valve V31 and a refrigerant-water heat exchanger 310 are provided in this order from the one end of the refrigerant pipe P301 (located

[0229] (corresponding to "water module side refrigerant adjusting device" of the present application), a refrigerant-water heat exchanger 310, and the other end (located at point K31 in Figure 8 the refrigerant pipe P301 of the water module 300 is connected to the outside connection pipe (the portion outside the outdoor unit 100) of the fourth connection pipe P4.

[0230] Here, it is preferable to make the water in the pipe of the water circuit SH flow in the direction of the solid arrows in the drawing (for example, refer to FIG. 2).

[0231] (first connection pipe P1 to fourth connection pipe P4)

[0232] The first connection pipe P1 connects one end (located at K20 in Figure 8 ) of the first indoor side pipe P201 of the indoor unit 200 to the other end (located at point K13 in Figure 8 ) of the compressor suction pipe Pi, the second connection pipe P2 connects the other end (located at K21 in Figure 9 ) of the first indoor side pipe P201 of the indoor unit 200 to the second port b of the four-way switching valve VF1, the third connection pipe P3 connects the other end (located at point K23 in Figure 8 ) of the second indoor side pipe P202 of the indoor unit 200 to the third port c of the four-way switching valve VF1, and the fourth connection pipe P4 connects the other end (located at point K31 in Figure 8 ) of the refrigerant pipe P301 of the water module 300 to the middle (located at point K12 in Figure 9 ) of the second outdoor side pipe P102.

[0233] In addition, in the heat pump system 1 of the present embodiment, a control unit (not shown) is further included for controlling the operation of the components of the heat pump system 1, such as the compressor 110, the outdoor blower 140, the valves V11, V21, V22, the indoor blower 230, the valve V31, and the four-way switching valve VF1.

[0234] Other advantages and modifications will readily occur to those skilled in the art. The application in its broader aspects is therefore not limited to the specific details, representative devices, and representative procedures shown and described. Accordingly, various modifications can be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents.

[0235] For example, in the heat pump system 1 of the present application, as shown in Figure 3 , the indoor unit 200 is described by way of example as a three-pipe indoor unit, but the present application is not limited thereto, and can be as shown in Figure 4The two-pipe indoor unit is shown, and the outdoor unit 100, the indoor unit 200 and the water module 300 are connected to each other by three connecting pipes.

[0236] In addition, in the water module 300 of the utility model, the water supply valve 700 arranged on the water pipe P302 is located outside the shell of the water module 300, but the utility model is not limited to this, and the water supply valve 700 can also be located inside the shell of the water module 300, at this time, the water supply valve 700 can also not have a handle to rotate the valve core 712, but can control the rotation of the valve core 712 by being connected to a control unit not shown, that is, become an electric three-way valve.

[0237] In addition, in the water module 300 of the utility model, as shown in Figure 10 , the water supply valve 700 is arranged on the pipe section inside the shell (indicated by a dashed line) of the water module 300 of the water circuit SH before entering the refrigerant-water heat exchanger 310 (also known as the "water inlet side"), but the utility model is not limited to this, and the water supply valve 700 can also be arranged on the pipe section outside the shell (indicated by a dashed line) of the water module 300. In addition, the valve device of the utility model is applied to the water supply pipeline for supplementing water to the water circuit SH from the outside, that is, the water supply valve 900 in Figure 10 、 ​ can be replaced by the valve device of the utility model. That is, the fluid filtered by the filter assembly 10 can not only be circulating water in a closed loop water circuit, but also external water sources such as municipal water.

[0238] In addition, in the heat pump system 1 of the utility model, the outdoor unit 100 and the water module 300 are separately arranged, but can also be integrally arranged.

[0239] In addition, in the water supply valve (valve device) 700 of the utility model, as shown in ​ 、 ​ , the water supply valve 700 is arranged on the pipe section inside the shell (indicated by a dashed line) of the water module 300 of the water circuit SH before entering the refrigerant-water heat exchanger 310 (also known as the "water inlet side"), but the utility model is not limited to this, and the water supply valve 700 can also be arranged on the pipe section outside the shell (indicated by a dashed line) of the water module 300. In addition, the valve device of the utility model is applied to the water supply pipeline for supplementing water to the water circuit SH from the outside, that is, the water supply valve 900 in ​ 、 ​ can be replaced by the valve device of the utility model. That is, the fluid filtered by the filter assembly 10 can not only be circulating water in a closed loop water circuit, but also external water sources such as municipal water.The flow direction shown flows, by changing the path of the fluid from the fluid inlet 21a to the fluid outlet 21b from the original straight flow channel to a substantially U-shaped flow channel, the collection rate of impurities can be further improved and impurities can more easily enter the impurity collection cavity 731a of the impurity collection part 730 along the second channel T2.

Claims

1. A valve device provided in a water circuit for processing a fluid flowing in the water circuit, comprising a three-way valve body having a first port and a second port provided in series in a water inflow direction, the first port and the second port forming a first passage, a second passage intersecting the first passage midway, the second passage having a third port at an end thereof, a filter assembly provided in the three-way valve body for filtering water flowing from the first port to the second port, characterized in that the valve device further comprises a foreign matter collecting portion having an end cover connected to the third port of the three-way valve body and having a foreign matter collecting chamber formed in an inside of the end cover, and an anti-backflow member installed in the end cover and provided between the filter assembly provided in the three-way valve body and the foreign matter collecting chamber.

2. The valve device according to claim 1, characterized in that the filter assembly is cylindrical and has a foreign matter flow outlet at a bottom end thereof communicating with the foreign matter collecting portion at the third port of the three-way valve body, the end cover has a foreign matter collecting port formed on a side thereof facing the three-way valve body, the foreign matter collecting port being provided corresponding to the foreign matter flow outlet.

3. The valve device according to claim 2, characterized in that the filter assembly includes a filter screen provided in a cylindrical shape in an inside of the three-way valve body in an axial direction, the filter screen includes an intermediate filter portion and an outer peripheral portion located at an outer periphery of the intermediate filter portion, a circumferential dimension of the foreign matter collecting port is greater than a circumferential dimension of the intermediate filter portion of the filter screen and is less than or equal to a circumferential dimension of the outer peripheral portion of the filter screen.

4. The valve device according to claim 2, characterized in that the filter assembly includes a filter screen support in a cylindrical shape elongated in the axial direction as a whole, and a filter screen provided in the axial direction and supported by the filter screen support, a circumferential dimension of the foreign matter collecting port is greater than an inner peripheral dimension of the filter screen support and is less than or equal to an outer peripheral dimension of the filter screen support.

5. The valve device according to claim 1, characterized in that the filter assembly includes a filter screen support in a cylindrical shape elongated in an axial direction as a whole, the filter screen support having a fluid inlet and a fluid outlet for inflow and outflow of a fluid with respect to the filter screen support provided in a facing manner to each other on a circumferential side surface thereof around the axial direction, the fluid inlet corresponding to the first port, the fluid outlet corresponding to the second port, a partition plate is provided between the fluid inlet and the fluid outlet, the partition plate including, in a direction of the second passage, a block plate portion for blocking a fluid flow corresponding to positions of the fluid inlet and the fluid outlet, respectively, and a filter plate portion other than the block plate portion, the filter plate portion being capable of allowing a fluid to flow therethrough.

6. The valve device according to claim 1, characterized in that The filter assembly includes a filter support which is a cylinder in the axial direction, the filter support is provided with a fluid inlet and a fluid outlet on the circumferential side of the axial direction in a manner facing each other for fluid inflow and outflow relative to the filter support, the fluid inlet corresponds to the first port, the fluid outlet corresponds to the second port, The fluid inlet is provided with a backflow baffle extending toward the second channel inside the edge.

7. The valve device according to claim 2, wherein The anti-backflow member includes: a frame portion that cooperates with the edge of the impurity collection port; a guide portion that is formed integrally with the frame portion and extends toward the center and the inside of the impurity collection chamber; and an impurity inlet through which impurities pass.

8. The valve device according to claim 2, wherein The anti-backflow member includes: a frame portion that cooperates with the edge of the impurity collection port; and an anti-backflow sheet that is provided on the frame portion and is made of a flexible material, The frame portion is composed of a circumferential frame portion and a plurality of support bars that are formed integrally with the circumferential frame portion and converge at the center portion of the frame portion, A plurality of slits are formed in the anti-backflow sheet corresponding to the plurality of support bars of the frame portion, the plurality of slits converge at the center of the anti-backflow sheet corresponding to the center portion of the frame portion, and the sheet material of the anti-backflow sheet between adjacent two slits becomes an impurity inlet portion that can be opened by water pressure.

9. The valve device according to any one of claims 1 to 8, wherein A cleaning port is provided at the bottom of the impurity collection chamber of the impurity collection portion, A plug is provided at the cleaning port.

10. The valve device according to claim 9, wherein The inner wall surface of the impurity collection chamber is formed as an inclined surface that inclines toward the cleaning port.

11. The valve device according to any one of claims 1 to 8, wherein A drain assembly that communicates with the first channel is provided at a position of the first channel of the three-way valve body close to the second port.

12. The valve device according to claim 11, wherein The drain assembly includes: a first pipe section that is connected to the first channel, a valve rod that adjusts the opening and closing of the drain assembly is provided in the first pipe section, and a valve cap of the drain assembly is provided at the outer end portion of the first pipe section; and a second pipe section that is cross-connected to the first pipe section for draining.

13. The valve device according to claim 12, wherein The flow direction of the second pipe section of the drain assembly is opposite to the flow direction of the water in the first channel.

14. A water module including a housing in which a refrigerant-water heat exchanger is provided, the refrigerant-water heat exchanger is connected with a refrigerant pipe and a water pipe, in the refrigerant-water heat exchanger, the refrigerant flowing through the refrigerant pipe and the water flowing through the water pipe exchange heat, characterized in that The water pipe comprises a water inlet pipe section connected with the water inlet end of the refrigerant-water heat exchanger, and the valve device of any one of claims 1 to 13 is arranged on the water inlet pipe section.

15. The water module of claim 14, wherein The valve device is arranged on the water inlet pipe section of the water circuit in such a way that: The first passage of the three-way valve body is horizontal; or The first passage of the three-way valve body is inclined in such a way that the impurity collection part is located at a low position and the filter assembly is located at a high position; or The first passage of the three-way valve body is vertical in such a way that the impurity collection part and the filter assembly are located at the same horizontal plane.

16. The water module of claim 15, wherein When the first passage of the three-way valve body is horizontal, the second pipe section of the water discharge assembly of the valve device is arranged horizontally, or is arranged downwardly inclined or vertically downwardly relative to the horizontal plane.

17. The water module of any one of claims 14 to 16, wherein The water pipe comprises a water outlet pipe section connected with the water outlet end of the refrigerant-water heat exchanger, The valve device is arranged on the water outlet pipe section.

18. A heat pump system, characterized by The water module of any one of claims 14 to 17.

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