Water module and heat pump system

Abstract

The invention provides a water module and a heat pump system, which can reliably prevent the interior of a refrigerant-water heat exchanger from freezing and frost cracking in the water module without electrifying a power supply. The water module comprises a shell, a refrigerant distribution pipe, a water distribution pipe and a refrigerant-water heat exchanger are arranged in the shell, and the refrigerant-water heat exchanger is connected with the refrigerant distribution pipe and the water distribution pipe. The water piping is provided with a first water piping connected with the water inlet end of the refrigerant-water heat exchanger and a second water piping connected with the water outlet end of the refrigerant-water heat exchanger, and at least one of the first water piping and the second water piping is provided with a weak part.

Description

Technical Field

[0001] The invention relates to a water module and a heat pump system. Background Art

[0002] The water module of the heat pump system may freeze the water pipes and refrigerant-water heat exchanger due to the low outside air and low water temperature in winter, or the water inside the refrigerant-water heat exchanger may freeze during the defrosting operation of the heat pump system due to the temperature drop of the refrigerant flowing through the refrigerant-water heat exchanger. As we all know, water will expand in volume due to freezing, which may cause the refrigerant-water heat exchanger to freeze and crack. At this time, water and refrigerant may mix and enter the outdoor unit (including outdoor heat exchanger, compressor, etc.) connected to the water module of the heat pump system along the layout of the refrigerant pipes, causing the outdoor unit components or even the entire heat pump system to be scrapped due to water ingress.

[0003] In the prior art, although various controls (such as running a water pump to circulate the water in the water circuit, or starting an electric heater, etc.) are performed to prevent the water in the water module from freezing, such controls usually require the power to be turned on, and most of the measures used to prevent freezing are to only run the water pump. This is because the water is connected to the room, and when the water pump is running, the water flows in the water pipe, and the indoor temperature can prevent the water in the part of the water pipe located indoors from freezing, so even if the compressor of the outdoor unit is not running, freezing can be prevented. Of course, the water can also be heated by a heat pump, but this is often used when the temperature drops even if the water pump is turned on. However, when the power is cut off, the aforementioned controls such as running the water pump or starting the electric heater cannot be executed. At this time, if the ambient temperature drops, for example, when the heat pump system is not started in the north in winter, the existing means of preventing the water in the water module from freezing will fail, causing the water to freeze inside the refrigerant-water heat exchanger, thereby increasing the risk of freezing and cracking of the refrigerant-water heat exchanger.

[0004] Therefore, there is an urgent need for a water module and a heat pump system that have a structure that is not based on power supply and can reliably prevent water from freezing and then cracking inside the refrigerant-water heat exchanger in the water module. Summary of the invention

[0005] The present invention is made to solve the above-mentioned existing technical problems, and one of its purposes is to provide a water module having a structure that can reliably prevent the interior of the refrigerant-water heat exchanger from freezing and then cracking in the water module without power supply.

[0006] Another object of the present invention is to provide a heat pump system having the water module.

[0007] In order to achieve one purpose of the present invention, the present invention provides a water module, which includes a shell, in which a refrigerant pipe, a water pipe and a refrigerant-water heat exchanger respectively connected to the refrigerant pipe and the water pipe are arranged, and the water pipe has a first water pipe connected to the water inlet end of the refrigerant-water heat exchanger and a second water pipe connected to the water outlet end of the refrigerant-water heat exchanger, and at least one of the first water pipe and the second water module is provided with a weak portion.

[0008] Since a weak portion is provided on at least one of the first water pipe and the second water pipe, when the water pump in the water module does not work and cannot circulate water in the water circuit, or when the water pump is running but the amount of water circulating in the water pipe is very small or even the water pump is idling, the water in the water circuit freezes due to the drop in ambient temperature, and the weak portion ruptures earlier than other parts of the pipe and the refrigerant-water heat exchanger, so that water can be discharged from the rupture in the water circuit (water pipe) of the water module, which can prevent water from freezing in the refrigerant-water heat exchanger and then freezing and cracking, thereby avoiding malfunction or even scrapping of the heat pump system due to water mixing in the refrigerant circuit.

[0009] Preferably, in the height direction, the weak portion is arranged at a height lower than the top inner wall surface of the refrigerant-water heat exchanger.

[0010] According to the above-described construction, since water flows out from the upper part of the refrigerant-water heat exchanger located at a high position to the lower rupture position, the water will not completely fill the refrigerant-water heat exchanger. At this time, even if the water in the refrigerant-water heat exchanger is not drained, the refrigerant-water heat exchanger will not freeze and crack due to freezing.

[0011] Preferably, the water module further comprises an electrical component, and in the height direction, the electrical component is arranged above the weak portion.

[0012] According to the above structure, even if the weak part is broken, water will be discharged from the broken part by gravity. Since the electrical components are arranged above the weak part and there are no electrical components below the weak part, it is possible to prevent the electrical components from being stained by water.

[0013] It is further preferred that a drain pan is arranged below the weak portion.

[0014] According to the above configuration, since the drain pan for receiving water is provided, the water discharged from the rupture by gravity does not splash toward the bottom plate below the water module, and the discharged water can be safely discharged out of the machine body by the drain pan.

[0015] More preferably, the weak portion is a structure that can be installed and removed relative to the first water pipe and the second water pipe by means of threaded connection or coupler connection.

[0016] According to the above-mentioned structure, after a failure occurs, the broken piping part can be removed by simple thread disassembly and coupler disassembly, and a new piping part can be installed. Compared with connection methods such as brazing or soldering, there is no need for cutting and welding, and replacement is easier.

[0017] In addition, in the first water pipe and the second water pipe, a large diameter portion that increases the outer diameter of a certain part of the pipe can be provided as the weak portion, and the outer diameter of the pipe of the large diameter portion is larger than the outer diameter of the pipe connected to the refrigerant-water heat exchanger. At the same time, a thin-walled portion that makes the outer diameter of the pipe the same and makes the actual thickness of a certain part of the pipe smaller can be used as the weak portion. In addition, the low temperature resistance of the material of the weak portion provided on at least one of the first water pipe and the second water pipe can be lower than the low temperature resistance of the material of the first water pipe and the second water pipe.

[0018] According to the above configuration, such a weak portion can be flexibly designed in different pipes of the water module so as to be a rupture location that ruptures earlier than the refrigerant-water heat exchanger to discharge water.

[0019] In order to achieve another object of the present invention, a heat pump system is provided, characterized in that it includes the above-mentioned water module.

[0020] According to the structure as described above, the refrigerant-water heat exchanger can be reliably prevented from freezing and cracking inside the water module without power supply, thereby preventing water from entering the outdoor unit along the layout of the refrigerant piping and causing the components of the outdoor unit or even the entire heat pump system to be scrapped due to water ingress.

[0021] In the present invention, the heat pump system includes an outdoor unit. The outdoor unit can be separately provided with the water module or integrated with the water module, and has a simple structure and flexible installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the layout inside the housing of the water module of the present invention as viewed from the front, The front plate and two side plates of the housing are omitted.

[0023] Figure 2 yes Figure 1 A schematic diagram of a thin-wall design of a first water pipe connected to a water inlet side of a refrigerant-water heat exchanger in a water module as a weak portion is shown.

[0024] Figure 3 yes Figure 1 A schematic diagram of the design of a muffler as a weak point of the second water pipe connected to the water outlet side of the refrigerant-water heat exchanger in the water module shown.

[0025] Figure 4 is a schematic circuit diagram of a heat pump system including the water module of the present invention.

[0026] Figure 5 is a schematic diagram showing one layout of a water module and an outdoor unit in a heat pump system.

[0027] Figure 6 is a schematic diagram showing another layout of a water module and an outdoor unit in a heat pump system. (Explanation of symbols)

[0028] 1. Heat pump system; 10 outdoor units; 11 Fan room; 12 Mechanical room; 13. Refrigerant piping; 14 compressor; 20 User-side water system; 21 Floor heating coils; 30 Air conditioner indoor unit; 31 heat exchanger; P1 gas piping; P2 liquid piping; V1 water module electronic expansion valve; V2 Air conditioner indoor unit electronic expansion valve; 100 Water Module; 110 housing; 111 back panel; 112 base plate; 113 top plate; 121 Refrigerant piping; 121A first refrigerant pipe; 121B second refrigerant piping; 122 Water piping; 122A First water distribution pipe; 122A1 bypass branch; 122A2 Water filtration assembly; 122B Second water distribution pipe; 122B1 valve assembly; 122C Third water pipe; 130 Refrigerant-water heat exchanger; 140 expansion tank; 150 weak part; 151 first weak portion (weak portion 150); 152 second weak portion (weak portion 150); 160 electrical component box; 170 Water pumps; 171Fix the bracket. DETAILED DESCRIPTION

[0029] Below, refer to Figure 1 , the water module 100 of the present invention is described in detail. In these figures, Figure 1 1 is a schematic diagram of the layout inside the housing 110 of the water module 100 of the present invention as viewed from the front, wherein the illustration of the front plate and two side plates of the housing are omitted.

[0030] The water module 100 of the present invention is installed on the wall in a manner that the back plate 111 is hung on the wall. Figure 1 As shown in the direction of preparation for hanging, the housing 110 of the water module 100 includes a front plate (not shown), a back plate 111 , left and right side plates (not shown), a bottom plate 112 and a top plate 113 .

[0031] like Figure 1 As shown, the water module 100 is provided with a refrigerant pipe 121 , a water circuit composed of a water pipe 122 , and a refrigerant-water heat exchanger 130 for performing heat exchange between the refrigerant flowing through the refrigerant pipe 121 and the water flowing through the water pipe 122 .

[0032] Specifically, if Figure 1 As shown, the refrigerant piping 121 comprises: a first refrigerant piping 121A, one end of which is connected to an external connecting piping of a liquid side piping not shown in the figure, and the other end is connected to a liquid side piping interface at the upper end of the refrigerant-water heat exchanger 130 (a liquid inlet end when the refrigerant flows in one direction, such as heating, and a liquid outlet end when the refrigerant flows in another direction opposite to the aforementioned one direction, such as defrosting); a second refrigerant piping 121B, one end of which is connected to a gas side piping interface at the lower end of the refrigerant-water heat exchanger 130 (a gas outlet end when the refrigerant flows in the aforementioned one direction, such as heating, and a gas inlet end when the refrigerant flows in the aforementioned other direction, such as defrosting), and the other end of the second refrigerant piping 121B is connected to an external connecting piping of a gas side piping not shown in the figure.

[0033] In addition, Figure 1In the embodiment, the water pipe 122 comprises: a first water pipe 122A, one end of which is connected to the water inlet end of the refrigerant-water heat exchanger 130, and the other end is connected to the external water pipe, thereby realizing connection with the user-side water system 20 (for example, floor heating (see Figure 4 The third water pipe 122C has one end connected to the water outlet of the water pump 170, and the other end connected to the water pipe outside the machine, thereby realizing the connection with the user-end water system 20 (such as floor heating, faucet, hot water tank, water heater, etc.). Here, the water pump 170 is preferably configured to make the water in the water pipe 122 flow in the direction of the first water pipe 122A, the refrigerant-water heat exchanger 130, the second water pipe 122B, the water pump 170, the third water pipe 122C, ..., the user-end water system 20 (such as floor heating, faucet, hot water tank, water heater, etc.), ..., the first water pipe 122A.

[0034] Taking floor heating as an example, after the water passes through the refrigerant-water heat exchanger 130 for heat exchange, it flows from the water outlet end of the refrigerant-water heat exchanger 130 through the second water pipe 122B, the water pump 170, and the third water pipe 122C in sequence, and enters the floor heating inlet via the external water pipe connected to the third water pipe 122C. After entering the floor heating, the water radiates heat to the room. The cooled water flows from the floor heating outlet to the first water pipe 122A, and enters the refrigerant-water heat exchanger 130 again for heat exchange, forming a circulating water loop.

[0035] like Figure 1 As shown, a bypass branch pipe 122A1 is provided on the first water distribution pipe 122A, and the bypass branch pipe 122A1 is connected to the expansion tank 140. The expansion tank 140 is used to buffer the pressure fluctuation of the water circuit to prevent the water circuit pressure from rising too fast or falling too sharply, and ensure the pressure balance of the water circuit, so that the water circuit of the water module 100 operates at a relatively stable pressure.

[0036] The liquid side piping interface and the gas side piping interface of the refrigerant-water heat exchanger 130 are respectively connected to the liquid side piping and the gas side piping of the outdoor unit 10 through the refrigerant piping 121 to form a circulating refrigerant circuit.

[0037] In addition, a water filter assembly 122A2 is provided on the first water pipe 122A (see Figure 2) is used to filter impurities in the water to ensure the cleanliness of the water in the circulating water loop, to prevent impurities from entering the refrigerant-water heat exchanger 130 and causing blockage, thereby affecting the heat exchange efficiency and life, and to prevent impurities from entering the water pump 170 and causing damage to the water pump 170.

[0038] In addition, if Figure 1 As shown, the second water pipe 122B is provided with a valve assembly 122B1 such as an exhaust valve, a flow switch, and a safety valve. The valve assembly 122B1 is arranged downstream of the second weak portion 152 (weak portion 150), and in the height direction, the valve assembly 122B1 is arranged above the second weak portion 150, so that even if the second weak portion 150 is frozen and cracked, the water flowing out from the frozen crack will not splash onto the valve assembly 122B1, and thus will not cause a bad impact on the valve assembly 122B1.

[0039] In addition, the water module 100 also includes a temperature sensor (not shown), which includes a first temperature sensor arranged on the water pipe 122 for detecting the water temperature and a second temperature sensor arranged on the refrigerant pipe 121 for detecting the refrigerant temperature. The first temperature sensor is arranged at one or more of the first water pipe 122A, the second water pipe 122B, and the third water pipe 122C. The heat pump system 1 adjusts the operating state of the water module 100 according to the detection results of the first temperature sensor and / or the second temperature sensor. For example, when the temperature of the water inlet or the water outlet of the refrigerant-water heat exchanger 130 is lower than a preset value, the water pump 170 is turned on to circulate the water in the water circuit to prevent freezing. Alternatively, the water pump 170 can be turned on to discharge the water in the water module SH.

[0040] In addition, if Figure 1 As shown, the water module 100 also includes electrical components (not shown), which are housed in an electrical component box 160. The electrical component box 160 is arranged above the weak portion 150 (the first weak portion 151 and the second weak portion 152, which will be described in detail below) to prevent water from splashing onto the electrical components and causing safety accidents when the weak portion 150 is frozen and cracked.

[0041] In addition, if Figure 1 As shown, the water pump 170 is arranged below the refrigerant-water heat exchanger 130, and the water pump 170 is horizontally arranged through a fixed bracket 171. Compared with the refrigerant-water heat exchanger 130, the first weak portion 151 is arranged at a position close to the water pump 170, which can reduce the impact on the refrigerant-water heat exchanger 130 when freezing occurs.

[0042] In addition, the water circuit of the water module 100 may also be connected to water pipes of domestic water terminals such as floor heating or faucets, hot water tanks, and water heaters.

[0043] (Weak portion 150: first weak portion 151, second weak portion 152)

[0044] Next, refer to Figure 2 , Figure 3 Combined with the previous Figure 1 , the structure of the water module 100 in the heat pump system 1 to prevent freezing / frozen cracking at the refrigerant-water heat exchanger 130 is described in detail, wherein, Figure 2 Shows Figure 1 The first weak portion 151 (thin-wall design) of the first water pipe 122A as the weak portion 150 connected to the water inlet side of the refrigerant-water heat exchanger 130 in the water module 100 shown in the figure, Figure 3 yes Figure 1 The illustrated diagram is a schematic diagram of a second weak portion 152 (muffler design) serving as a weak portion 150 of a second water pipe 122A connected to the water outlet side of a refrigerant-water heat exchanger 130 in a water module 100 .

[0045] like Figure 1 As shown, the water pipe 122 of the water circuit includes a first water pipe 122A connected to the water inlet end of the refrigerant-water heat exchanger 130 and a second water pipe 122B connected to the water outlet end of the refrigerant-water heat exchanger 130 .

[0046] When the power supply of the water module 100 is cut off, the heat pump 170 in the water module 100 does not work and the water cannot circulate in the water pipe 122. At this time, if the ambient temperature drops, the existing means of preventing the water in the water module 100 from freezing will become ineffective, causing the water to freeze in the refrigerant-water heat exchanger 130, thereby increasing the risk of the refrigerant-water heat exchanger 130 freezing and cracking. In order to avoid this situation, the present invention provides a weak portion 150 (a first weak portion 151, a second weak portion 152) on at least one of the first water pipe 122A and the second water pipe 122B. The weak portion 150 ruptures before the refrigerant-water heat exchanger 130 after freezing. In this way, even if the heat pump 170 in the water module 100 does not work, or even if the means for preventing the water in the water module 100 from freezing fails, the water may freeze in the water module 100. Since the weak portion 150 ruptures first, the water can be discharged from the water circuit (water pipe 122) of the water module 100, which can prevent the water from freezing and then freezing and cracking in the refrigerant-water heat exchanger 130. Therefore, it can be prevented that the water follows the arrangement of the refrigerant pipe and enters the outdoor unit 10, thereby causing the components of the outdoor unit 10 or even the entire heat pump system 1 to be scrapped due to water ingress.

[0047] Although the present invention only requires that a physically weak portion 150 be provided on at least one of the first water pipe 122A and the second water pipe 122B, it is preferred that both the first water pipe 122A and the second water pipe 122B have a physically weak portion 150, that is, a first weak portion 151 is provided on the first water pipe 122A, and a second weak portion 152 is provided on the second water pipe 122B.

[0048] If the first water pipe 122A or the second water pipe 122B has a weak portion 150 that ruptures before the refrigerant-water heat exchanger 130, when water freezes in the refrigerant-water heat exchanger 130, the expansion pressure generated by the freezing of water will cause the weak portion 150 of the first water pipe 122A or the second water pipe 122B to rupture before the refrigerant-water heat exchanger 130, causing the water in the water pipe 122 of the water circuit to be discharged from the rupture by gravity.

[0049] At this time, it is preferred that, in the height direction, the setting height of the weak portion 150 is lower than the top inner wall surface of the refrigerant-water heat exchanger 130. In this case, since water flows out from the upper part of the refrigerant-water heat exchanger 130 located at a high position to the lower rupture position, the water will not completely fill the refrigerant-water heat exchanger 130. At this time, even if the water in the refrigerant-water heat exchanger 130 is not drained, the refrigerant-water heat exchanger 130 will not be frozen and cracked due to freezing.

[0050] After the weak portion 150 in the first water pipe 122A and the second water pipe 122B is broken, water will be discharged from the broken portion by gravity. In order to prevent the electrical components from being soaked in water, it is preferred that the electrical components are arranged above the broken position of the weak portion 150 in the height direction. In addition, it is further conceivable that a drain pan (not shown) is arranged below the broken position of the weak portion 330 to receive water after freezing and breaking.

[0051] At the same time, in order to easily replace the sections of the weak portion 150 that have been ruptured in the first water distribution pipe 122A and the second water distribution pipe 122B, it is preferred that the weak portion 150 is a structure that can be installed and removed relative to the first water distribution pipe 122A and the second water distribution pipe 122B by means of threaded connection or coupler connection.

[0052] In the case of a straight pipe, there is the following relationship between the diameter and theoretical wall thickness of the pipe and the allowable pressure of the pipe.

[0053] Formula 1: in: t: Theoretical wall thickness of the tube, unit: mm P: Design pressure of the pipe (allowable pressure), unit: MPa D0 : The outer diameter of the tube, unit: mm σ α : Allowable tensile stress of the material, unit: N / mm 2 η: The connection efficiency of the pipe joint. If there is no connection between pipes, it is 1.0.

[0054] From the above formula, we can see that the outer diameter D of the tube 0 Under the same conditions, the theoretical wall thickness t of the pipe is proportional to the design pressure (allowable pressure) P of the pipe, and under the same design pressure (allowable pressure) P of the pipe, the theoretical wall thickness t of the pipe is proportional to the outer diameter D of the pipe. 0 There is also a direct proportion between them.

[0055] In practice, in order to prevent the pipe from rupturing due to occasional instantaneous pressure exceeding the design pressure, the actual thickness T of the pipe is often calculated by adding a certain margin Δt to the theoretical wall thickness t.

[0056] Since the outer diameter D of the tube 0 The larger the wall thickness t is, the greater the theoretical wall thickness t required to withstand the same design pressure (allowable pressure) P is. In order to design the weak portion 150 more conveniently, in the case of a pipe with ample space for layout (such as the second water pipe 122B), it is preferred to provide a large diameter portion in the pipe that increases the outer diameter of a certain part of the pipe (such as Figure 3 The second weak portion 152 with a muffler design as shown in the figure is used as the weak portion 150. In this case, the outer diameter of the large diameter portion of the pipe is larger than the outer diameter of the pipe connected to the refrigerant-water heat exchanger 130. In the case of a pipe with a compact spatial layout (such as the first water pipe 122A), an outer diameter D 0 The same pipe is used, and a thin-walled portion (e.g. Figure 2 The first thin-walled portion 151 having a thin-walled design is shown as the weak portion 150 .

[0057] The weak portion 150 may also be formed by the piping material, for example, the refrigerant-water heat exchanger 130 is made of stainless steel, and the first water piping 122A and the second water piping 122B are made of copper pipes, plastic pipes, PE pipes and other materials, and the material of the refrigerant-water heat exchanger 130 is more resistant to low temperatures than the material of the water piping 122. For another example, if the second weak portion 152 is made of plastic, PE and other materials, and the other parts of the second water piping 122B are made of metal pipes, the second weak portion 152 is not as resistant to low temperatures as the other parts of the second water piping 122B.

[0058] According to the structure as described above, since a weak portion 150 is provided on the water piping 122, when the water pump 170 in the water module 100 does not work and cannot circulate water in the water circuit, or when the water pump 170 is running but the amount of water circulating in the water piping 122 is very small or even the water pump 170 is idling, the water in the water circuit freezes due to the drop in ambient temperature, and the weak portion 150 ruptures earlier than other piping parts and the refrigerant-water heat exchanger 130, so that water can be discharged from the rupture in the water circuit (water piping 122) of the water module 100, thereby preventing water from freezing in the refrigerant-water heat exchanger 130 and then freezing and cracking, thereby preventing the heat pump system 1 from malfunctioning or even being scrapped due to water mixing in the refrigerant circuit.

[0059] Of course, the water pump 170 can be Figure 1 The water pump 170 is arranged inside the housing of the water module 100 as shown, and can also be arranged outside the housing, for example, specifically arranged on the water circuit connecting the water module 100 and the user-end water system 20, to drive the water circulation in the water circuit. Figure 1 As shown, it is arranged at the water outlet side of the water module 100, and can also be arranged at the water inlet side.

[0060] Next, refer to Figure 4 , the heat pump system 1 of the present invention is described, wherein, Figure 4 is a schematic circuit diagram of a heat pump system 1 including a water module 100 of the present invention.

[0061] In addition, the heat pump system 1 of the present invention includes an outdoor unit 10, the aforementioned water module 100 and a user-end water system 20. The outdoor unit 10 is connected to the water module 100 via a gas pipe P1 and a liquid pipe P2. A water module electronic expansion valve V1 is connected between the liquid pipe P2 of the outdoor unit 10 and the water module 100. The water inlet and outlet of the water module 100 are connected to the user-end water system 20 via pipelines.

[0062] The heat pump system 1 may also include one or more indoor units 30, the outdoor unit 10 is connected to one or more indoor units 30 via a gas pipe P1 and a liquid pipe P2, and an indoor unit electronic expansion valve V2 is connected between the liquid pipe P2 of the outdoor unit 10 and the heat exchanger 31 of the indoor unit 30.

[0063] The user-side water system 20 at least includes a floor heating coil 21, and the floor heating coil 21 heats the indoor space.

[0064] like Figure 1As shown, the floor heating (floor heating coil 21) included in the user-end water system 20 can be one or more, and a manifold (not shown) can be set between the water module 100 and the floor heating (floor heating coil 21). The manifold can be used to adjust the amount of water flowing into the floor heating in each room, thereby adjusting the temperature of each room.

[0065] like Figure 1 As shown, the outdoor unit 10 can be connected to the water module 100 and the indoor unit 30 through the liquid side piping P2 and the gas side piping P1, that is, two-pipe connection. Alternatively, the outdoor unit 10 can be connected to the indoor unit 30 through the liquid side piping P2, the gas side piping P1, and the high and low pressure piping P3, that is, three-pipe connection, and connected to the water module 100 through the liquid side piping P2 and the gas side piping P1.

[0066] like Figure 1 As shown, the water module 100 and the outdoor unit 10 can be separate, and suitable installation positions can be selected according to the actual installation site, so that the installation is flexible. Of course, the water module 100 and the outdoor unit 10 can also be set as one.

[0067] For example, Figure 5 As shown, the water module 100 and the outdoor unit 10 are arranged in the same housing 2, and the outdoor unit 10 has a fan chamber 11 for accommodating a fan assembly and a heat exchanger and a mechanical chamber 12 for accommodating components such as a compressor 14, a liquid accumulator, an electric valve, and a refrigerant piping 13. The water module 100 can be arranged on the side of the mechanical chamber 12 of the outdoor unit 10 in the housing 2 so that the refrigerant-water heat exchanger 130 in the water module 100 (more specifically, the refrigerant piping 121 connected to the refrigerant-water heat exchanger 130) is connected to the refrigerant piping 13 in the outdoor unit 10, wherein, more preferably, as Figure 5 As shown, the water module 100 is arranged above the compressor 14 and other components, which is beneficial to the miniaturization of the entire equipment.

[0068] Of course, you can also Figure 6 As shown, the water module 100 and the outdoor unit 10 are stacked up and down, and the water module 100 is fixedly arranged as a whole below the outdoor unit 10, which is convenient for connecting the refrigerant-water heat exchanger 130 in the water module 100 (more specifically, the refrigerant pipe 121 connected to the refrigerant-water heat exchanger 130) and the refrigerant pipe 13 in the outdoor unit 10 and the water pipe in the water module 100 connected to the user-end water system 20, and is also conducive to reducing the overall installation space requirement of the equipment.

[0069] Those skilled in the art will readily appreciate other advantages and modifications. Therefore, in its broader sense, the present invention is not limited to the specific details and representative embodiments shown and described herein. Therefore, modifications may be made without departing from the spirit or scope of the overall inventive concept as defined by the appended claims and their equivalents.

Claims

1. A water module, comprising a shell, in which a refrigerant pipe, a water pipe, and a refrigerant-water heat exchanger connected to the refrigerant pipe and the water pipe are arranged, It is characterized in that The water pipe comprises a first water pipe connected to a water inlet end of the refrigerant-water heat exchanger and a second water pipe connected to a water outlet end of the refrigerant-water heat exchanger. A weak portion is provided on at least one of the first water pipe and the second water pipe.

2. The water module according to claim 1, It is characterized in that In the height direction, the weak portion is arranged at a height lower than the top inner wall surface of the refrigerant-water heat exchanger.

3. The water module according to claim 1, It is characterized in that The water module also includes electrical components, In the height direction, the electrical component is arranged above the weak portion.

4. The water module according to claim 1, It is characterized in that A drain pan is arranged below the weak portion.

5. The water module according to claim 1, It is characterized in that The weak portion has a structure that can be attached to and detached from the first water pipe and the second water pipe by threaded connection or coupler connection.

6. The water module according to any one of claims 1 to 5, It is characterized in that The first water pipe is provided with a first weak portion, and the first weak portion is provided with a wall thickness smaller than a wall thickness of the first water pipe.

7. The water module according to claim 6, It is characterized in that The first water pipe is provided with at least one of an on-off valve and a water filter assembly. The first weak portion is arranged between the water inlet end of the refrigerant-water heat exchanger and the on-off valve or the water filter assembly.

8. The water module according to any one of claims 1 to 5, It is characterized in that A second weak portion is provided in the second water pipe, and the second weak portion is provided in an expansion structure having an inner diameter larger than an inner diameter of the second water pipe.

9. The water module according to claim 8, It is characterized in that A water pump is provided on the water pipe. One end of the second water pipe is connected to the refrigerant-water heat exchanger, and the other end is connected to the water inlet of the water pump. The second weak portion is arranged at a position close to the water inlet of the water pump.

10. The water module according to any one of claims 1 to 5, It is characterized in that The low-temperature resistance of a material of the weak portion provided in at least one of the first water pipe and the second water pipe is lower than the low-temperature resistance of a material of the first water pipe and the second water pipe.

11. A heat pump system, It is characterized in that The water module comprises the water module according to any one of claims 1 to 10.

12. The heat pump system according to claim 11, It is characterized in that The heat pump system comprises an outdoor unit, and the outdoor unit is separately arranged with the water module or is arranged integrally with the water module.

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