Waterway module and heat pump unit

Abstract

The waterway module comprises a buffer water tank, an expansion tank, a plate heat exchanger, an exhaust valve, a pressure release valve and a water replenishing valve, the top of the buffer water tank is connected with a water replenishing pipe, and the water replenishing valve, the exhaust valve and the pressure release valve are all arranged on the water replenishing pipe; a water inlet and a water outlet are vertically formed in the side wall face of the buffer water tank at intervals, the water inlet of the buffer water tank is connected with a water inlet pipe, the water outlet of the buffer water tank is connected with a water inlet below the plate heat exchanger through a pipeline, and a water outlet above the plate heat exchanger is connected with a water outlet pipe. And a water outlet below the expansion tank is communicated with a water inlet below the plate heat exchanger through a pipeline. The buffer water tank can effectively exhaust air and relieve pressure, the problem of stagnant water can be avoided, and water flow is kept smooth.

Description

Technical Field

[0001] The present application relates to the technical field of heat pump equipment, and in particular to a water channel module and a heat pump unit. Background Art

[0002] In the current situation of tightening energy supply and increasing environmental protection requirements, people are constantly looking for new energy sources that are both energy-saving and environmentally friendly. Heat pumps are one of the new energy sources and are widely used in practical projects. However, the buffer water tank of conventional heat pump units is often installed in an external way, which has some limitations. Since the buffer water tank is usually only equipped with an inlet pipe and an outlet pipe, several key problems will be encountered in actual operation. First, since gas may enter the buffer water tank, this may cause pressure imbalance. In addition, sewage may accumulate in the water tank. Therefore, in order to maintain the normal operation of the system, it is crucial to install an exhaust valve and a pressure relief valve. These valves usually need to be installed on the top of the buffer water tank to effectively remove gas and release excess pressure. However, there is a design contradiction here. If the water inlet pipe is also installed on the top of the water tank, although the gas and pressure problems can be solved, it will also cause a dead water area in the water tank, that is, the water flow is not smooth, which may cause water quality problems and reduced efficiency. Utility Model Content

[0003] The purpose of the embodiments of the present application is to provide a water channel module and a heat pump unit that can effectively exhaust and relieve pressure while avoiding dead water problems and maintaining smooth water flow.

[0004] To achieve the above objectives, this application adopts the following technical solutions:

[0005] On the one hand, a water circuit module is provided, comprising: a buffer water tank, an expansion tank, a plate heat exchanger, an exhaust valve, a pressure relief valve and a water supply valve, wherein a water supply pipe is connected to the top of the buffer water tank, and the water supply valve, the exhaust valve and the pressure relief valve are all arranged on the water supply pipe, and a water inlet and a water outlet are arranged at intervals above and below the side wall surface of the buffer water tank, the water inlet of the buffer water tank is connected to a water inlet pipe, the water outlet of the buffer water tank is connected to the water inlet below the plate heat exchanger through a pipe, the water outlet above the plate heat exchanger is connected to the water outlet pipe, and the water outlet below the expansion tank is connected to the water inlet pipe below the plate heat exchanger.

[0006] Furthermore, the expansion tank has a flat structure.

[0007] Furthermore, the expansion tank is installed vertically, and its water outlet is arranged at the bottom.

[0008] Furthermore, the water outlet below the expansion tank is connected to the water inlet below the plate heat exchanger through a bellows.

[0009] Furthermore, a sewage pipe is also provided at the lower portion of the side wall surface of the buffer water tank.

[0010] Furthermore, the exhaust valve and the pressure relief valve are arranged on the pipeline between the buffer water tank and the water supply valve.

[0011] Furthermore, it also includes a bracket, which is used to fix and install the expansion tank.

[0012] Furthermore, a plurality of support frames arranged at intervals are provided at the bottom of the buffer water tank.

[0013] On the other hand, a heat pump unit is further provided, comprising a housing and a water channel module as described in any one of the above items, wherein the water channel module is installed inside the housing.

[0014] Furthermore, a detachable maintenance plate is provided on the shell, and the maintenance plate corresponds to the position of the filter.

[0015] The beneficial effects of the present application are as follows: the direction of the water path in the water path module is that after the water comes in from the water inlet pipe, it passes through the filter and enters the buffer water tank through the upper water inlet of the buffer water tank, and then flows from the lower water outlet of the buffer water tank to the lower water inlet of the plate heat exchanger. After the water exchanges heat inside the plate heat exchanger, it flows from the upper water outlet to the user end under the action of the water pump, thereby realizing the supply of hot water; at the same time, by arranging a water supply pipe on the top of the buffer water tank, the buffer water tank can be replenished with water in time, the exhaust valve and the pressure relief valve can ensure the stability of the water pressure in the buffer water tank, and the expansion tank plays a role in balancing the water pressure of the entire water path module, which can effectively realize the exhaust and pressure relief of the buffer water tank, and avoid the problem of dead water, and keep the water flow in the buffer water tank unobstructed; in addition, the entire water path module is integrated into the interior of the shell, which is easy to install. Compared with the water path module installed on the outside, this installation method is more beautiful, and the water path module installed inside is not prone to collision damage, has better reliability, and is more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present application is further described in detail below based on the drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the structure of the water channel module described in the embodiment of the present application;

[0018] Figure 2 It is a partial structural schematic diagram of the heat pump unit described in the embodiment of the present application;

[0019] Figure 3 This is a schematic diagram of the structure of the expansion tank described in the embodiment of the present application;

[0020] Figure 4 This is a schematic structural diagram of a water channel module according to another embodiment of the present application.

[0021] In the figure:

[0022] 1. Buffer water tank; 101. Drain port; 2. Expansion tank; 3. Plate heat exchanger; 4. Water pump; 5. Exhaust valve; 6. Pressure relief valve; 7. Water supply valve; 8. Filter; 9. Water inlet pipe; 10. Water outlet pipe; 11. Water supply pipe; 12. Drain pipe; 13. Support frame; 14. Shell; 15. Maintenance panel; 16. Bracket. DETAILED DESCRIPTION

[0023] In order to make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0024] In the description of this application, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0025] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0026] like Figure 1As shown, this embodiment provides a water circuit module, which includes: a buffer water tank 1, an expansion tank 2, a plate heat exchanger 3, a water pump 4, an exhaust valve 5, a pressure relief valve 6, a water supply valve 7 and a filter 8. The buffer water tank 1 and the plate heat exchanger 3 are arranged at intervals, and the buffer water tank 1 includes a top surface, a bottom surface and a side wall surface extending therebetween. The side wall surface of the buffer water tank 1 is provided with a water inlet, and the side wall surface of the buffer water tank 1 is provided with a water outlet near the bottom surface. The water inlet of the buffer water tank 1 is located between the water supply pipe 11 and the water outlet. The buffer water tank 1 The water inlet is connected to a water inlet pipe 9, the filter 8 is installed on the water inlet pipe 9, the water outlet of the buffer water tank 1 is connected to the water inlet below the plate heat exchanger 3 for water circulation, the water outlet above the plate heat exchanger 3 is provided with a water outlet pipe 10, the water pump 4 is installed on the water outlet pipe 10, the top surface of the buffer water tank 1 is connected to a water supply pipe 11, the water supply valve 7, the exhaust valve 5 and the pressure relief valve 6 are all arranged on the water supply pipe 11, and the water outlet below the expansion tank 2 is connected to the water inlet below the plate heat exchanger 3 through a pipeline.

[0027] Based on the above scheme, the direction of the water path in the entire water path module is as follows: the water inlet pipe 9 is connected to the external water source, and the external water source is used to fill the buffer water tank 1 through the water inlet pipe 9. Before the water enters the buffer water tank 1, it will first be filtered through the filter 8 to ensure that the water quality entering the buffer water tank 1 meets the requirements. After the water enters the buffer water tank 1, it is transported to the plate heat exchanger 3 through the water outlet at the bottom. The water inlet of the plate heat exchanger 3 is also arranged at the bottom to facilitate the water transportation of the buffer water tank 1. After the water enters the plate heat exchanger 3 for heat exchange, it is transported from the water outlet above the plate heat exchanger 3 to the user end through the water outlet pipe 10. Since the water is pumped from the bottom to the top, a water pump 4 is arranged on the water outlet pipe 10 to provide pressure so that the water can be smoothly discharged from the plate The water output is output above the plate heat exchanger 3. At the same time, the water outlet below the expansion tank 2 is also connected to the water inlet below the plate heat exchanger 3. When the water flow is pressurized by the water pump 4, the expansion tank 2 can buffer the pressure fluctuation of the water channel, eliminate water hammer, stabilize the pressure and unload, and ensure the water pressure stability of the system; in addition, the water supply valve 7 arranged on the top water supply pipe 11 of the buffer water tank 1 plays a role in controlling the on-off of the water supply pipe 11. When the water amount in the buffer water tank 1 is lower than the preset value, the water supply valve 7 can be opened to supply water to the set water level in the buffer water tank 1 through the water supply pipe 11. The exhaust valve 5 can discharge the gas in the buffer water tank 1 in time. When the pressure in the buffer water tank 1 is too high, the pressure relief valve 6 can be opened to relieve the pressure to ensure the pressure balance in the buffer water tank 1.

[0028] It is worth mentioning that in the above scheme, the water inlet and water supply port of the buffer water tank 1 are independently set. In the traditional scheme where the water inlet is set on the top surface of the buffer water tank 1, since the water inlet is set at the highest position, the system is prone to dead water, that is, the water flow is not flowing. In this scheme, the water inlet of the buffer water tank 1 is set on the side wall surface. Compared with the top surface setting, its height is reduced, and the probability of dead water in the system is greatly reduced, which can ensure the water flow in the buffer water tank 1 to the greatest extent. In general, in this scheme, the exhaust valve 5 and the pressure relief valve 6 on the water supply pipe 11 can be used to exhaust and relieve the pressure of the buffer water tank 1, and the dead water problem can be avoided, so as to keep the water flow in the buffer water tank 1 smooth.

[0029] In addition, it should be noted that the water supply pipe 11 and the water inlet pipe 9 cannot be the same pipe. The water inlet pipe 9 may be connected to the return water at the indoor end. The water supply pipe 11 is used to replenish water during engineering installation or when the system is short of water. It is connected to the external tap water pipe and is set up as two separate pipes. It is convenient to replenish the buffer water tank 1 through the water supply pipe 11 to avoid being affected by the connection of the water inlet pipe 9. Secondly, in terms of position relationship, the water inlet pipe 9 cannot be installed at the top, which is prone to dead water.

[0030] At the same time, since the water inlet of the buffer water tank 1 is arranged at the bottom, the water outlet is arranged at the corresponding bottom to better transport water to the plate heat exchanger 3, and the water inlet of the plate heat exchanger 3 is at the water outlet below the buffer water tank 1 in the vertical direction, which makes it easier to transport water through pipes.

[0031] Furthermore, the expansion tank 2 is flat in structure, the expansion tank 2 is installed vertically, and its water outlet is arranged at the bottom. The expansion tank 2 with a flat structure occupies less space in installation, and is installed vertically, so that its water outlet is vertically downward, so that the water in the expansion tank 2 is affected by gravity and pressure, and the water can be more easily transported out from the water outlet.

[0032] It should be noted that the expansion tank 2 is composed of four parts: the tank body, the airbag, the water inlet / outlet, and the air replenishment port. The tank body is generally made of carbon steel with an anti-rust paint layer on the outside; the airbag is made of EPDM environmentally friendly rubber; the pre-filled gas between the airbag and the tank body is already filled at the factory and there is no need to add gas yourself. The working principle of the expansion tank 2: When pressurized water from the outside enters the airbag of the expansion tank 2, the nitrogen sealed in the tank is compressed. According to Boyle's gas law, the volume of the gas decreases and the pressure increases after being compressed. The water intake is stopped when the gas pressure in the expansion tank 2 reaches the same level as the water pressure. When the water loss pressure decreases, the gas pressure in the expansion tank 2 is greater than the water pressure. At this time, the gas expands to squeeze the water in the airbag and replenish it into the system

[0033] Optionally, the water outlet below the expansion tank 2 is connected to the water inlet below the plate heat exchanger 3 through a bellows. Bellows have many advantages, the most prominent of which is their good flexibility. The corrugated shape of the bellows makes it very flexible, and it can bend and twist within a certain range to adapt to various complex pipeline layouts. In addition, the bellows also has good high temperature resistance, corrosion resistance, high strength and other characteristics, and can operate stably for a long time in harsh working environments.

[0034] Furthermore, a sewage outlet is provided below the side wall of the buffer water tank 1, and the sewage outlet is connected to a sewage pipe 12. After the buffer water tank 1 has been used for a long time, the water stored therein will be polluted, so it needs to be cleaned in time, and the sewage can be discharged through the sewage outlet and sewage pipe 12 provided below. Moreover, since the sewage outlet is provided below the side wall of the buffer water tank 1, it is easier to discharge water under the influence of gravity and pressure, and it is also convenient to operate sewage discharge.

[0035] As an optional specific implementation scheme, Figure 4 As shown, the sewage outlet 101 of the buffer water tank 1 is arranged on the bottom surface. Compared with the solution of being arranged on the side wall surface, the sewage discharge effect is better and the sewage can be discharged more cleanly and thoroughly.

[0036] In some embodiments, the exhaust valve 5 and the pressure relief valve 6 are arranged on the pipeline between the buffer water tank 1 and the water supply valve 7. Since the water supply valve 7 is used to control the closing and opening of the water supply pipe 11, the exhaust valve 5 and the pressure relief valve 6 need to be arranged on the pipeline between the water supply valve 7 and the buffer water tank 1 to prevent mutual interference between the valves.

[0037] like Figure 3 As shown, in order to improve the installation stability of the expansion tank 2, a bracket 16 is also included, and the bracket 16 is used to fix the expansion tank 2.

[0038] Furthermore, a plurality of spaced support frames 13 are provided at the bottom of the buffer water tank 1. The support frames 13 are evenly spaced along the bottom circumference of the buffer water tank 1 to ensure that the buffer water tank 1 is stably installed and evenly stressed, and the buffer water tank 1 can maintain a certain distance from the chassis of the heat pump unit through the support frames 13 provided at the bottom to avoid the transmission of unit vibration.

[0039] On the other hand, Figure 2 As shown, a heat pump unit is also provided, including a shell 14 and a water channel module as described above, wherein the water channel module is installed inside the shell 14, and the entire water channel module is integrated inside the shell 14, which is easy to install. Compared with the water channel module installed on the outside, this installation method is more beautiful, and the water channel module installed inside is not prone to collision damage, has better reliability, and is more practical.

[0040] Preferably, a detachable maintenance plate 15 is provided on the shell 14, and the maintenance plate 15 corresponds to the position of the filter 8. When the buffer water tank 1 is filled with water, the filter 8 needs to filter continuously and uninterruptedly, which may easily cause the filter 8 to malfunction, or the filtering effect will decrease after a period of use, and it needs to be replaced or repaired in time. In this case, generally speaking, the entire sheet metal of the heat pump unit needs to be removed, which is troublesome to operate. In this solution, a detachable maintenance plate 15 is separately provided at the position corresponding to the filter 8. By removing the maintenance plate 15 separately, the filter 8 inside the shell 14 is exposed, and the operator can replace or repair the filter 8 separately, which is more convenient and simple to operate.

[0041] In the description of this article, it should be understood that the terms "upper", "lower", "left", "right", etc., and other directions or positional relationships are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of this application. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0042] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0043] In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0044] The technical principles of the present application are described above in conjunction with specific embodiments. These descriptions are only for explaining the principles of the present application and cannot be interpreted as limiting the scope of protection of the present application in any way. Based on the explanations herein, those skilled in the art can think of other specific implementation methods of the present application without creative work, and these methods will fall within the scope of protection of the present application.

Claims

1. A waterway module, characterized in that: include: A buffer water tank (1), an expansion tank (2), a plate heat exchanger (3), an exhaust valve (5), a pressure relief valve (6) and a water supply valve (7); the top of the buffer water tank (1) is connected to a water supply pipe (11); the water supply valve (7), the exhaust valve (5) and the pressure relief valve (6) are all arranged on the water supply pipe (11); a water inlet and a water outlet are arranged at intervals above and below the side wall of the buffer water tank (1); the water inlet of the buffer water tank (1) is connected to a water inlet pipe (9); the water outlet of the buffer water tank (1) is connected to the water inlet below the plate heat exchanger (3) through a pipeline; the water outlet above the plate heat exchanger (3) is connected to a water outlet pipe (10); the water outlet below the expansion tank (2) is connected to the water inlet pipe below the plate heat exchanger (3).

2. The waterway module according to claim 1, characterized in that: The expansion tank (2) is a flat structure, the expansion tank (2) is installed vertically, and its water outlet is arranged at the bottom.

3. The water channel module according to claim 1, characterized in that: The water outlet below the expansion tank (2) is connected to the water inlet below the plate heat exchanger (3) via a bellows.

4. The waterway module according to any one of claims 1 to 3, characterized in that: A sewage discharge pipe (12) is also provided at the lower portion of the side wall surface of the buffer water tank (1).

5. The water channel module according to any one of claims 1 to 3, characterized in that: The exhaust valve (5) and the pressure relief valve (6) are arranged on the pipeline between the buffer water tank (1) and the water replenishment valve (7).

6. The water channel module according to any one of claims 1 to 3, characterized in that: It also comprises a bracket (16), wherein the bracket (16) is used for fixing and installing the expansion tank (2).

7. The water channel module according to any one of claims 1 to 3, characterized in that: The bottom of the buffer water tank (1) is provided with a plurality of support frames (13) arranged at intervals.

8. A heat pump unit, comprising a housing (14), characterized in that: It also comprises a water channel module as claimed in any one of claims 1 to 7, wherein the water channel module is installed inside the housing (14).

9. The heat pump unit according to claim 8, characterized in that: The water inlet pipe (9) is provided with a filter (8).

10. The heat pump unit according to claim 9, characterized in that: The housing (14) is provided with a detachable maintenance plate (15), and the maintenance plate (15) corresponds to the position of the filter (8).

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