A heat pump return water system
Patent Information
- Application Number
- CN202522009974.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-18
- Publication Date
- 2026-09-15
- Estimated Expiration
- 2035-09-18
AI Technical Summary
由于缺乏有效的温度监测和控制，导致回水中的热水温度波动较大，影响热泵主机的加热效率，增加了能耗
通过回水管路上温度传感器与第一温控阀的电连接配合，可实时监测回水温度并动态调节阀门开度以控制回水流速，有效避免回水温度剧烈波动，为热泵主机提供稳定适配的回水温度；储水箱内第二温控阀与热泵主机的联动，能根据水箱水温精准控制主机加热启停，防止主机空转或过度加热，显著提升主机加热效率；同时，回水管路与连接管路外壁的保温层可阻断水与外界的热量交换，减少回水输送过程中的热量损失，外侧电伴热带在低温时自动启动防结冰，进一步避免主机因回水温度过低或管路故障产生额外能耗，结构设计简洁，适配现有热泵水冷系统的循环需求。
Smart Images
Figure CN224757288U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat pump water return, and specifically to a heat pump water return system. Background Technology
[0002] A heat pump water cooling system involves returning water, which has been cooled after heat exchange at the user end (such as industrial heat-using equipment), to the heat pump unit. The unit then reheats or treats the water before it circulates back to the user end through the outlet pipe, forming a complete closed-loop heat exchange system. However, the existing heat pump water cooling system's return water system has the following shortcomings: The lack of effective temperature monitoring and control leads to large fluctuations in the temperature of the hot water in the return water, which affects the heating efficiency of the heat pump unit and increases energy consumption.
[0003] Therefore, in order to overcome the shortcomings of the existing technology, a heat pump return water system with a simple structure needs to be designed. Utility Model Content
[0004] This invention provides a heat pump water return system to address the problems of existing technologies.
[0005] The objective of this utility model can be achieved through the following technical solution: A heat pump return water system includes a heat pump main unit, a return water pipeline, and a water storage tank. The outlet of the heat pump main unit is connected to the user end through the outlet pipeline, and the outlet of the user end is connected to the inlet of the water storage tank through the return water pipeline. The outlet of the water storage tank is connected to the return water port of the heat pump main unit through a connecting pipeline. A temperature sensor, a first temperature control valve, a filter, and a return water booster pump are sequentially arranged on the return water pipeline. The return water booster pump is located between the filter and the water storage tank. The temperature sensor is electrically connected to the first temperature control valve. A variable frequency circulation pump is arranged on the connecting pipeline. A liquid level sensor and a second temperature control valve are arranged inside the water storage tank. The second temperature control valve is electrically connected to the heat pump main unit. The outer walls of the return water pipeline and the connecting pipeline are wrapped with an insulation layer. An electric heating tape is wrapped around the outside of the insulation layer. The electric heating tape is electrically connected to the temperature controller. As a further improvement, the variable frequency circulating pump is electrically connected to the liquid level sensor inside the water storage tank. In a further improvement, the insulation layer is made of polyurethane insulation material with a thickness of 30-50mm, and the electric heating cable is a self-regulating electric heating cable.
[0006] As a further improvement, a drain outlet is provided at the bottom of the water storage tank, and a drain valve is provided on the drain outlet. As a further improvement, a first shut-off valve is provided on the water outlet pipe near the outlet of the heat pump unit, and a pressure gauge and a copper gate valve are sequentially provided on the side of the water outlet pipe near the water-using end.
[0007] As a further improvement, the return water pipeline is equipped with a second ball valve at the inlet end of the filter and a third ball valve at the outlet end of the filter.
[0008] Compared with the prior art, the beneficial effects of this utility model's heat pump water return system are: By connecting the temperature sensor on the return water pipe with the first thermostatic valve, the return water temperature can be monitored in real time and the valve opening can be dynamically adjusted to control the return water flow rate, effectively avoiding drastic fluctuations in return water temperature and providing a stable and suitable return water temperature for the heat pump unit. The linkage between the second thermostatic valve in the water tank and the heat pump unit can accurately control the start and stop of the unit's heating according to the water temperature in the tank, preventing the unit from running dry or overheating, and significantly improving the unit's heating efficiency. At the same time, the insulation layer on the outer wall of the return water pipe and connecting pipe can block the heat exchange between the water and the outside, reducing heat loss during the return water transportation process. The outer electric heating cable automatically starts to prevent freezing at low temperatures, further avoiding additional energy consumption by the unit due to excessively low return water temperature or pipe failure. The structure is simple and adaptable to the circulation requirements of existing heat pump water cooling systems. Attached Figure Description
[0009] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 2 This is a schematic diagram of the thermal insulation mechanism in this utility model. In the diagram, 1-Heat pump main unit, 2-Return water pipe, 3-Water storage tank, 4-Outlet water pipe, 5-Water user end, 6-Connecting pipe, 7-Temperature sensor, 8-First temperature control valve, 9-Filter, 10-Variable frequency circulating pump, 11-Liquid level sensor, 12-Second temperature control valve, 13-Insulation layer, 14-Electric heating tape, 15-Temperature controller, 16-Drain outlet, 17-Drain valve, 18-First shut-off valve, 19-Copper gate valve, 20-Second ball valve, 21-Third ball valve, 22-Return water booster pump, 23-Pressure gauge. Detailed Implementation
[0010] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; unless otherwise expressly specified and limited, the terms "installed," "connected," and "joined" should be interpreted broadly, for example, they can refer to fixed connections or detachable connections, etc. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0011] The following is a description of the embodiments and appendices. Figures 1-2 The technical solution of this utility model will be further described below.
[0012] Example 1 A heat pump water return system includes a heat pump unit 1, a return water pipeline 2, and a water storage tank 3. The outlet of the heat pump unit 1 is connected to a water user 5 via an outlet pipeline 4. The outlet of the water user 5 is connected to the inlet of the water storage tank 3 via the return water pipeline 2. The outlet of the water storage tank 3 is connected to the return water outlet of the heat pump unit 1 via a connecting pipeline 6. A temperature sensor 7, a first temperature control valve 8, a filter 9, and a return water booster pump 22 are sequentially installed on the return water pipeline 2. Located between filter 9 and water storage tank 3, temperature sensor 7 is electrically connected to first temperature control valve 8; variable frequency circulating pump 10 is provided on connecting pipe 6, liquid level sensor 11 and second temperature control valve 12 are provided inside water storage tank 3, and second temperature control valve 12 is electrically connected to heat pump host 1; the outer walls of return water pipe 2 and connecting pipe 6 are both wrapped with heat insulation layer 13, and electric heat tracing tape 14 is wrapped around the outside of heat insulation layer 13, and electric heat tracing tape 14 is electrically connected to temperature controller 15. like Figures 1-2 As shown, the working principle of this utility model is as follows: The heat pump unit's outlet is connected to the user's end via an outlet pipe. After use, the cooled water returns to the storage tank via a return pipe. Water in the storage tank is then transported back to the heat pump unit via connecting pipes. A temperature sensor monitors the return water temperature in real time. The first thermostatic valve receives the signal from the temperature sensor and controls the return water flow rate by adjusting the valve opening. When the return water temperature is too low, the valve opens wider, increasing the return water flow rate; when the return water temperature is too high, the valve closes less, slowing down the return water flow rate. These two actions work together to achieve a dynamic balance in the return water temperature.
[0013] The second temperature control valve monitors the water temperature in the storage tank and transmits the temperature signal to the heat pump unit. When the water temperature is lower than the unit's heating threshold, the unit starts heating; when the water temperature reaches the unit's stop threshold, the unit stops, preventing the unit from running idle or overheating and reducing energy consumption.
[0014] The insulation layer is tightly wrapped around the outer wall of the return water pipe and connecting pipe. Utilizing the low thermal conductivity of the insulation material, it blocks the heat exchange between the water in the pipe and the external environment, reducing heat loss of the return water during transportation. The electric heating tape is a low-temperature heating component. When the ambient temperature is too low, the temperature controller triggers the electric heating tape to start, generating heat and transferring it to the pipe through the insulation layer to prevent the water in the pipe from freezing. After the ambient temperature rises, the electric heating tape automatically stops to avoid overheating.
[0015] In a further preferred embodiment, the variable frequency circulating pump 10 is electrically connected to the liquid level sensor 11 inside the water storage tank 3. The liquid level sensor collects the water level signal in the water storage tank in real time; the variable frequency circulating pump receives the water level signal and controls the amount of water delivered to the main unit by adjusting its speed. When the water level is high, the speed is increased to accelerate water delivery; when the water level is low, the speed is decreased to slow down water delivery.
[0016] As a further preferred embodiment, the insulation layer 13 is made of polyurethane insulation material with a thickness of 30-50mm, and the electric heating tape 14 is a self-regulating electric heating tape. Polyurethane material has a low thermal conductivity, reducing heat loss. The self-regulating electric heating tape is flexible and bendable, and can be wrapped around complex parts such as bends and valves to ensure that there are no dead zones in the pipeline, further improving the pipeline protection effect.
[0017] As a further preferred embodiment, the bottom of the water storage tank 3 is provided with a drain outlet 16, and a drain valve 17 is provided on the drain outlet 16. Sediment is periodically discharged through the drain outlet 16 to prevent impurities from accumulating in the water storage tank for a long time.
[0018] As a further preferred embodiment, a first shut-off valve 18 is provided on the water outlet pipe 4 near the water outlet of the heat pump unit 1. A pressure gauge 23 and a copper gate valve 19 are sequentially provided on the side of the water outlet pipe 4 near the water user 5. When the heat pump unit needs maintenance, the first shut-off valve is closed to cut off the connection between the unit's water outlet and the water outlet pipe. The water pressure in the water outlet pipe is monitored in real time by the pressure gauge. If the pressure is too high, the staff can promptly check for blockages; if the pressure is too low, the pump malfunction or leakage can be promptly checked. When the water user needs maintenance, the copper gate valve is closed to cut off the water supply from the water outlet pipe to the water user.
[0019] As a further preferred embodiment, the return water pipeline 2 is provided with a second ball valve 20 at the inlet end of the filter 9 and a third ball valve 21 at the outlet end of the filter 9. Closing the second and third ball valves at the inlet end allows for safe disassembly of the filter and replacement of the internal filter elements.
[0020] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.
Claims
1. A heat pump water return system, comprising a heat pump unit, a water return pipeline, and a water storage tank, characterized in that: The outlet of the heat pump unit is connected to the water user via an outlet pipe, the outlet of the water user is connected to the inlet of the water storage tank via a return pipe, and the outlet of the water storage tank is connected to the return port of the heat pump unit via a connecting pipe. The return water pipeline is sequentially equipped with a temperature sensor, a first temperature control valve, a filter, and a return water booster pump. The return water booster pump is located between the filter and the water storage tank. The temperature sensor is electrically connected to the first temperature control valve. The connecting pipeline is equipped with a variable frequency circulating pump, and the water storage tank is equipped with a liquid level sensor and a second temperature control valve. The second temperature control valve is electrically connected to the heat pump host. The outer walls of the return water pipe and the connecting pipe are covered with an insulation layer, and an electric heating tape is wrapped around the outside of the insulation layer. The electric heating tape is electrically connected to the temperature controller.
2. The heat pump return water system according to claim 1, characterized in that: The variable frequency circulating pump is electrically connected to the liquid level sensor in the water storage tank.
3. A heat pump water return system according to claim 1, characterized in that: The insulation layer is made of polyurethane insulation material with a thickness of 30-50mm, and the electric heating tape is a self-regulating electric heating tape.
4. A heat pump return water system according to claim 1, characterized in that: The bottom of the water storage tank is provided with a drain outlet, and the drain outlet is equipped with a drain valve.
5. A heat pump return water system according to claim 1, characterized in that: A first shut-off valve is installed on the water outlet pipe near the outlet of the heat pump unit, and a pressure gauge and a copper gate valve are installed sequentially on the side of the water outlet pipe near the water-using end.
6. A heat pump return water system according to claim 1, characterized in that: The return water pipeline is equipped with a second ball valve at the inlet end of the filter and a third ball valve at the outlet end of the filter.