Water mixing unit

Abstract

The utility model provides a water mixing unit which is used for being connected with a heat exchanger and conducting heat conversion and comprises a water inlet pipeline and a water return pipeline, a water outlet of the water inlet pipeline corresponds to the water inlet end of the heat exchanger, and the water inlet pipeline is provided with a water pump which is used for providing heat exchange media for the heat exchanger and runs continuously. The water outlet end of the heat exchanger corresponds to the water inlet of the water return pipeline; the water return pipeline comprises a first main water return pipeline and a second main water return pipeline, and the water inlet end of the first main water return pipeline and the water inlet end of the second main water return pipeline communicate with the water outlet end of the heat exchanger; the water outlet end of the first main water return pipeline and the water outlet end of the second main water return pipeline are both communicated with the water inlet end of heat exchange equipment; and the first main water return pipeline and / or the second main water return pipeline are / is provided with a flow regulating valve. The arrangement mode of the two main water return pipelines enables the water mixing unit to be suitable for heat exchange media of different flows, and the water pump and the flow adjusting valve can quantitatively control the water inlet and outlet amount.

Description

Technical Field

[0001] The utility model relates to the technical field of water mixing units, in particular to a water mixing unit for antifreezing and flow control. Background Art

[0002] A water mixing unit is a device that provides constant temperature hot water (adjusts the temperature of water and liquid) and reduces the water temperature. It is commonly found in heat exchange equipment such as floor heating and combined air-conditioning systems. Taking the combined air-conditioning system as an example, in the design and use of the combined air-conditioning system, the hot and cold water heat exchanger is widely used in the cooling and humidification and heating and dehumidification of the combined air-conditioning system due to its advantages such as convenient acquisition of cold and heat sources, easy temperature control, high heat exchange efficiency and low energy loss. The water mixing unit is a transportation, transfer and control device between hot and cold water and hot and cold water heat exchangers, and is of great significance to the combined air-conditioning system.

[0003] However, in actual applications, the existing water mixing units are difficult to be used in working environments with different flow rates due to their structural structure.

[0004] Therefore, how to solve the above-mentioned deficiencies in the prior art has become a topic to be studied and solved in the present invention. Summary of the invention

[0005] The utility model aims to provide a water mixing unit.

[0006] In order to solve the above technical problems, the utility model provides a water mixing unit for connecting to a heat exchanger and performing heat conversion, characterized in that: it comprises a water inlet pipeline and a return water pipeline, the water outlet of the water inlet pipeline of the water inlet pipeline is arranged corresponding to the water inlet end of the heat exchanger, and a water pump for providing heat exchange medium to the heat exchanger and operating continuously is arranged on the water inlet pipeline; the water outlet end of the heat exchanger is arranged corresponding to the water inlet of the return water pipeline of the return water pipeline; the return water pipeline comprises a first main return water pipeline and a second main return water pipeline, the water inlet end of the first main return water pipeline and the water inlet end of the second main return water pipeline are both connected to the water outlet end of the heat exchanger, and the water outlet end of the second main return water pipeline and the water outlet end of the first main return water pipeline are both connected to the water inlet end of a heat exchange device; the first main return water pipeline and / or the second main return water pipeline are detachably provided with a flow regulating valve.

[0007] According to a further technical solution, the flow regulating valve is detachably connected to the first main water return pipeline and / or the second main water return pipeline.

[0008] According to a further technical solution, the flow regulating valve comprises a first valve port and a second valve port, and the first valve port and the second valve port are detachably connected to the first main water return pipeline and / or the second main water return pipeline.

[0009] According to a further technical solution, the return water pipeline further comprises a branch return water pipeline, the water inlet end of the branch return water pipeline is arranged corresponding to the water outlet end of the heat exchanger, and the water outlet end of the branch return water pipeline is connected to the water inlet pipeline.

[0010] According to a further technical solution, the outlet end of the branch return water pipeline is selectively connected to the water inlet pipeline, and a check valve is provided at the outlet end of the branch return water pipeline. The opening or closing of the check valve controls the connection or isolation between the outlet end of the branch return water pipeline and the water inlet pipeline.

[0011] According to a further technical solution, the surfaces of the water inlet pipeline and the water return pipeline are both coated with a thermal insulation layer.

[0012] A further technical solution also includes an electronic control device for controlling the start and stop of the water pump and the flow regulating valve.

[0013] According to a further technical solution, a temperature gauge and a filtering device are provided on the water inlet pipeline.

[0014] According to a further technical solution, the water pump comprises a vertical water pump and a horizontal water pump.

[0015] The working principle and advantages of this utility model are as follows:

[0016] 1. The two main return water pipelines are arranged so that the heat exchange medium can pass through the first return water pipeline and / or the second return water pipeline, and thus the water mixing unit is suitable for heat exchange media with different flow rates;

[0017] 2. The water pump can control the water inlet flow of the heat exchange medium, and the flow regulating valve can control the return water flow of the heat exchange medium, so as to quantitatively control the inlet and outlet water volume, thereby improving the accuracy of the water mixing requirements;

[0018] 3. The water pump runs continuously to avoid freezing of the water pump due to low temperature, which may cause the entire water mixing unit to stop working. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Attached Figure 1 It is a schematic diagram of the three-dimensional structure of a water mixing unit including a vertical water pump according to an embodiment of the utility model;

[0020] Attached Figure 2 It is a front view of a water mixing unit including a vertical water pump according to an embodiment of the utility model;

[0021] Attached Figure 3 It is a side view of a water mixing unit including a vertical water pump according to an embodiment of the utility model;

[0022] Attached Figure 4 A top view of a water mixing unit including a vertical water pump according to an embodiment of the utility model;

[0023] Attached Figure 5 It is a schematic diagram of the three-dimensional structure of a water mixing unit including a horizontal water pump according to an embodiment of the utility model;

[0024] Attached Figure 6 It is a front view of a water mixing unit including a horizontal water pump according to an embodiment of the utility model;

[0025] Attached Figure 7 It is a side view of a water mixing unit including a horizontal water pump according to an embodiment of the utility model;

[0026] Attached Figure 8 A top view of a water mixing unit including a horizontal water pump according to an embodiment of the utility model;

[0027] In the above attached figure:

[0028] 1-water inlet pipeline; 2-water return pipeline; 3-heat exchange equipment; 4-heat exchanger;

[0029] 21-first main water return pipeline; 22-second main water return pipeline; 23-branch water return pipeline; 24-flow regulating valve;

[0030] 100 - water inlet of the water inlet pipe; 101 - water outlet of the water inlet pipe; 200 - water inlet of the return pipe; 201 - water outlet of the return pipe;

[0031] 11-temperature gauge; 12-filter device; 13-vertical water pump; 14-horizontal water pump; 25-pressure gauge;

[0032] 231-Check valve. DETAILED DESCRIPTION

[0033] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0034] Embodiment: The present invention will be clearly described below with diagrams and detailed descriptions. After understanding the embodiments of the present invention, any person skilled in the art can make changes and modifications based on the techniques taught by the present invention without departing from the spirit and scope of the present invention.

[0035] The terms used herein are only for describing specific embodiments and are not intended to be limiting of the present invention. Singular forms such as "a", "this", "here", "this" and "the" as used herein also include plural forms.

[0036] The terms “first”, “second”, etc. used in this document do not specifically refer to an order or sequence, nor are they used to limit the present case. They are only used to distinguish components or operations described with the same technical terms.

[0037] As used herein, “connected” or “positioned” may refer to two or more components or devices being in direct physical contact with each other, or being in indirect physical contact with each other, or may refer to two or more components or devices operating or moving with each other.

[0038] The terms “include,” “including,” “have,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0039] The terms used in this document generally have the ordinary meaning of each term used in this field, in the context of the case and in the specific context, unless otherwise noted. Certain terms used to describe the present invention will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the present invention.

[0040] The terms "front", "back", "up", "down", "left", "right", etc. used in this article are all directional terms. In this case, they are only used to illustrate the positional relationship between the various structures, and are not used to limit the protection plan of this case and the specific direction during actual implementation.

[0041] Please see attached Figure 1 The embodiment of the utility model provides a water mixing unit. As described in the background technology, the water mixing unit, as a transportation device and a control device between the heat exchange medium and the heat exchanger 4, has been widely used in heat exchange equipment 3. The heat exchange equipment 3 is a common indoor (or outdoor) heat exchange equipment 3 such as floor heating or combined air-conditioning system. In order to simplify the description, this embodiment will further explain in detail the structure and principle of the water mixing unit used in the above-mentioned combined air-conditioning system.

[0042] It can be understood that the heat exchange object of the water mixer can be liquid, gas or gas-liquid mixture. In this embodiment, the water mixer is connected to the heat exchanger 4 and performs heat conversion for cold water and hot water.

[0043] Please see attached Figure 1 ~Attached Figure 8 The water mixing unit provided in this embodiment includes a water inlet pipeline 1 and a water return pipeline 2, the water inlet pipeline 1 has a water inlet 100 and a water outlet 101 of the water inlet pipeline, the return water pipeline 2 has a water inlet 200 and a water outlet 201 of the return water pipeline, the water inlet 100 of the water inlet pipeline of the water inlet pipeline 1 serves as an inlet for cold water or hot water; the water outlet 101 of the water inlet pipeline 1 is connected to the water inlet end of the heat exchanger 4 in the combined air-conditioning system, and the water outlet end of the heat exchanger 4 is connected to the water inlet 200 of the return water pipeline 2.

[0044] Optionally, the connection method between the water outlet 101 of the water inlet pipeline 1 and the water inlet end of the heat exchanger 4 and the water outlet end of the heat exchanger 4 and the water inlet 200 of the return water pipeline 2 both includes flange connection.

[0045] For ease of explanation, in this embodiment, the cold water or hot water that enters the water inlet pipe 1 and does not reach the heat exchanger 4 is defined as inlet water, and the cold water or hot water that completes heat exchange in the heat exchanger 4 and enters the return water pipe 2 is defined as return water.

[0046] The incoming water enters from the water inlet 100 of the water inlet pipeline 1 and passes through the thermometer 11 to measure the temperature of the incoming water, and then passes through the filter device 12 to filter the incoming water to prevent impurities that may exist in the incoming water from corroding the heat exchanger 4 and the pipeline.

[0047] Optionally, the filtering device 12 is a Y-type filter.

[0048] Depend on Figure 1 It can be seen that the water outlet 101 of the water inlet pipeline 1 is arranged corresponding to the water inlet end of the heat exchanger 4. In this embodiment, part of the water inlet pipeline 1 is arranged in parallel, and the other part of the water inlet pipeline 1 is arranged vertically. It can be understood that the arrangement direction of the water outlet 101 of the water inlet pipeline 1 corresponds to the arrangement direction of the water inlet end of the heat exchanger 4. The water inlet pipeline 1 is provided with a water pump, which is used to transport the cold water or hot water in the water inlet pipeline 1 to the heat exchanger 4 along the second water inlet pipeline 1.

[0049] In this embodiment, the water pump is in a continuous operation state to avoid the problem of water being frozen due to too low temperature during use of the water mixing unit, which can effectively maintain the normal use of the water mixing unit.

[0050] In this embodiment, the water pump can be a vertical water pump 13 or a horizontal water pump 14, and those skilled in the art can choose one according to different application scenarios. Figure 1~Figure 4 , the vertical water pump 13 is used in application scenarios with small water flow, but occupies a small space; Figure 5~Figure 8 The horizontal water pump 14 is used in application scenarios with large water flow, but it occupies a large space.

[0051] After the inlet water enters the heat exchanger 4 through the inlet pipe 1 , the return water after heat exchange in the heat exchanger 4 is discharged along the water inlet 200 of the return pipe 2 .

[0052] See also Figure 2 or Figure 6 The return water pipeline 2 includes a first main return water pipeline 21 and a second main return water pipeline 22; wherein the two main return water pipelines are arranged in parallel, and the water inlet end of the first main return water pipeline 21 and the water inlet end of the second main return water pipeline 22 are both connected to the water outlet end of the heat exchanger 4, and the water outlet end of the second main return water pipeline 22 and the water outlet end of the first main return water pipeline 21 are both connected to the water inlet end of a heat exchange device 3.

[0053] Optionally, the return water in the heat exchanger 4 enters the first main return water pipeline 21 and the second main return water pipeline 22, and then the return water in the second main return water pipeline 22 is gathered into the first main return water pipeline 21, and is discharged from the outlet end of the first main return water pipeline 21, which is also the outlet 201 of the return water pipeline, to the inlet end of the heat exchange equipment 3.

[0054] Alternatively, the return water in the heat exchanger 4 enters the first main return water pipeline 21 and the second main return water pipeline 22, and is discharged to the water inlet end of the heat exchange equipment 3 along the water outlet of the first main return water pipeline 21 and the water outlet of the second main return water pipeline 22 respectively.

[0055] The first main water return pipeline 21 and / or the second main water return pipeline 22 is provided with a flow regulating valve 24, and the flow regulating valve (24) can adjust the flow of the return water.

[0056] Optionally, when a flow regulating valve (24) is provided on one of the first main return water pipeline 21 and the second main return water pipeline 22, a manual regulating valve for controlling the connection or closing of the main return water pipeline is provided on the other main return water pipeline, and the manual regulating valve can control the flow of the corresponding main return water pipeline.

[0057] In one embodiment, a flow regulating valve is provided on the first main water return pipeline 21, and a manual regulating valve is provided on the second main water return pipeline.

[0058] Since two main return water pipelines are provided, the water mixing unit can be adapted to situations with different flow rates. For example, when the current return water flow rate needs to be reduced, one main return water pipeline is sufficient for the return water to pass through, and the first main return water pipeline 21 or the second main return water pipeline 22 can be closed. When the second main return water pipeline 22 is closed, the return water flow rate in the first main return water pipeline 21 can be further controlled by a flow regulating valve (24). When the current return water flow rate needs to be increased, the first main return water pipeline 21 and the second main return water pipeline 22 can be opened at the same time, and the return water flow rate in the first main return water pipeline 21 can be further controlled by a flow regulating valve (24), and the return water flow rate in the second main return water pipeline 22 can be manually adjusted by a manual regulating valve.

[0059] Furthermore, the first main return water pipeline 21 and / or the second main return water pipeline 22 is detachably provided with a flow regulating valve 24, and the flow regulating valve 24 has a first valve port and a second valve port, and the first valve port and the second valve port are detachably connected to the first main return water pipeline 21 and / or the second main return water pipeline 22. Therefore, when the range of return water regulated by the current flow regulating valve 24 does not meet the demand, the current flow regulating valve 24 can be disassembled through the two valve ports and replaced with a flow regulating valve 24 of other specifications that can adjust a larger or smaller range, which is easy to operate.

[0060] In this embodiment, the flow regulating valve 24 is an electric two-way valve.

[0061] The return water pipeline 2 in this embodiment also includes a branch return water pipeline 23, and the outlet end of the branch return water pipeline 23 is selectively connected to the water inlet pipeline 1. A check valve 231 is provided at the outlet end of the branch return water pipeline 23. The opening and closing of the check valve 231 can control whether the return water in the branch return water pipeline 23 enters the first water inlet pipeline 1. When the check valve 231 is in a closed state, the return water is directly discharged along the first main return water pipeline 21 and / or the second main return water pipeline 22, and a return water cycle is completed; when the check valve 231 is in an open or partially open state, the return water is discharged along the branch return water pipeline 23 in addition to being discharged along the first main return water pipeline 21 and the second main return water pipeline 22. The return water discharged along the branch return water pipeline 23 enters the water inlet pipeline 1 again, and is mixed with the inlet water in the water inlet pipeline 1 again and enters the heat exchanger 4 together, that is, a secondary return water cycle.

[0062] Taking into account that when the water mixing unit transports hot and cold water, the temperature difference between hot and cold water prompts the water mixing unit to have different insulation requirements for the pipeline. In this embodiment, the surface of the water inlet pipeline 1 and the surface of the return pipeline 2 are both covered with an insulation layer (not shown in the figure), and glue is used to fix the insulation layer and the two pipelines to achieve the effect of anti-freezing in winter and heat preservation in summer.

[0063] In one embodiment, when the insulation requirement is low, rubber-plastic insulation is generally used; when the insulation requirement is high, rock wool insulation is generally used, and the rock wool layer is wrapped with iron sheet to achieve a better insulation effect.

[0064] In this embodiment, in order to solve the problem that the existing water mixing unit is difficult to repair and individual components cannot be checked separately, it is better to also include an electronic control device (not shown), which is only used to control the start and stop of the water pump and the electric two-way valve 24. Therefore, when the electric two-way valve 24 or the water pump fails, the two can be repaired separately without shutting down the entire water mixing unit.

[0065] The working process of the existing utility model is as follows:

[0066] The heat exchange medium flowing out of the heat exchange device 3 enters the water inlet pipeline 1 through the water inlet 100 of the water inlet pipeline 1, firstly passes through the thermometer 11 to measure (and display) the current temperature of the heat exchange medium, then passes through the filter device 12 to filter the heat exchange medium to remove impurities, and then passes through the water pump (vertical water pump 13 or horizontal water pump 14), and the water pump transports the heat exchange medium along the water outlet 101 of the water inlet pipeline 1 to the heat exchanger 4.

[0067] The heat exchanger 4 performs heat exchange on the heat exchange medium entering the heat exchanger 4, and discharges the heat exchange medium after heat exchange along the water inlet 200 of the return water pipeline 2. If it is necessary to reduce the flow rate of the current heat exchange medium, the first main return water pipeline 21 or the second main return water pipeline 22 can be closed, and when the second main return water pipeline 22 is closed, the flow rate of the heat exchange medium in the first main return water pipeline 21 can be further controlled by the flow regulating valve (24);

[0068] If it is necessary to increase the flow rate of the current heat exchange medium, the first main water return pipeline 21 and the second main water return pipeline 22 can be opened at the same time, and the flow rate of the heat exchange medium in the first main water return pipeline 21 can be further controlled by the flow regulating valve (24).

[0069] Furthermore, when it is necessary to perform a secondary water return circulation on the heat exchange medium, the check valve 231 can be opened to guide part or all of the heat exchange medium flowing out of the heat exchanger 4 into the water inlet pipe 1 and merge it with the incoming water in the water inlet pipe 1, and then re-deliver it to the heat exchanger 4 through the water pump (vertical water pump 13 or horizontal water pump 14), so as to realize the secondary water return circulation; the process of the secondary water return circulation utilizes the return water to be mixed with the incoming water again, so less heat or cooling is required than the process of the primary water return circulation.

[0070] The heat exchange medium flows from the first main return water pipeline 21 and / or the second main return water pipeline 22 to the water inlet end of the heat exchange device 3, thus completing a return water circulation process of the water mixing unit.

[0071] The heat exchange medium after heat exchange in the heat exchange device 3 enters the water inlet pipeline 1 again through the water inlet 100 of the water inlet pipeline 1, and repeats the above-mentioned flow process of the heat exchange medium, thereby achieving the work of circulating the heat exchange medium.

[0072] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A water mixing unit, used to be connected to a heat exchanger (4) and perform heat conversion, characterized in that: It comprises a water inlet pipeline (1) and a water return pipeline (2); The water outlet (101) of the water inlet pipeline (1) is arranged corresponding to the water inlet end of the heat exchanger (4), and the water inlet pipeline (1) is provided with a continuously operating water pump for providing heat exchange medium to the heat exchanger (4); The water outlet end of the heat exchanger (4) is arranged corresponding to the water inlet (200) of the return water pipeline (2); The water return pipeline (2) comprises a first main water return pipeline (21) and a second main water return pipeline (22); the water inlet end of the first main water return pipeline (21) and the water inlet end of the second main water return pipeline (22) are both connected to the water outlet end of the heat exchanger (4); the water outlet end of the first main water return pipeline (21) and the water outlet end of the second main water return pipeline (22) are both connected to the water inlet end of a heat exchange device (3); The first main water return pipeline (21) and / or the second main water return pipeline (22) is provided with a flow regulating valve (24).

2. The water mixing unit according to claim 1, characterized in that: The flow regulating valve (24) is detachably connected to the first main water return pipeline (21) and / or the second main water return pipeline (22).

3. The water mixing unit according to claim 2, characterized in that: The flow regulating valve (24) has a first valve port and a second valve port, and the first valve port and the second valve port are detachably connected to the first main water return pipeline (21) and / or the second main water return pipeline (22).

4. The water mixing unit according to claim 1, characterized in that: The return water pipeline (2) further comprises a branch return water pipeline (23), the water inlet end of the branch return water pipeline (23) being connected to the water outlet end of the heat exchanger (4), and the water outlet end of the branch return water pipeline (23) being connected to the water inlet pipeline (1).

5. The water mixing unit according to claim 4, characterized in that: A check valve (231) is provided at the water outlet end of the branch return water pipeline (23), thereby ensuring selective communication between the water outlet end of the branch return water pipeline (23) and the water inlet pipeline (1).

6. The water mixing unit according to claim 1, characterized in that: The surfaces of the water inlet pipeline (1) and the water return pipeline (2) are both coated with a thermal insulation layer.

7. The water mixing unit according to claim 1, characterized in that: It also includes an electronic control device for controlling the start and stop of the water pump and the flow regulating valve (24).

8. The water mixing unit according to claim 1, characterized in that: The water inlet pipeline (1) is provided with a temperature gauge (11) and a filtering device (12).

9. The water mixing unit according to claim 1, characterized in that: The water pump comprises a vertical water pump (13) and a horizontal water pump (14).

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