CN211233207U

CN211233207U - Heat exchange medium pipe network of ground source heat pump air conditioning system

Info

Publication number: CN211233207U
Application number: CN201922245120.9U
Authority: CN
Inventors: 孟庆海; 郭德法
Original assignee: Anhui Geology And Geothermal Energy Exploration Research Institute Co ltd; Anhui Technical College Of Industry And Economy
Current assignee: Anhui Geology And Geothermal Energy Exploration Research Institute Co ltd; Anhui Technical College Of Industry And Economy
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-08-11
Anticipated expiration: 2029-12-13

Abstract

The utility model belongs to the technical field of the ground source heat pump, in particular to ground source heat pump air conditioning system's heat transfer medium pipe network sets up control valve and temperature measurement unit at the return water end, through the liquid flow that returns, the velocity of flow of adjusting the buried pipeline, just can change heat transfer medium and be long when the heat transfer of underground to change the liquid temperature that returns of each buried pipeline, adjust the back many times, make each buried pipeline's in the pipe network return liquid temperature almost unanimous, thereby make the heat transfer medium pipe network reach optimum heat exchange efficiency. The two components are reasonably arranged, so that the adjustment index of the different-form heat exchange medium pipe network is more clear and the operation is simpler and more convenient, the application effect is optimized while the different-form heat exchange medium pipe network is simplified, and the popularization and the application of the ground source heat pump air conditioner are facilitated.

Description

Heat exchange medium pipe network of ground source heat pump air conditioning system

Technical Field

The utility model belongs to the technical field of the earth source heat pump, in particular to ground source heat pump air conditioning system's heat transfer medium pipe network.

Background

The design of a ground source heat pump air conditioning system is deeply limited by site conditions, building space and construction cost, the buried part of a heat exchange medium pipe network can only adopt a different-form pipeline, then the overground part is provided with a regulating valve such as a flow valve, a balance valve or a temperature compensation valve, and the like, and the gate valve is repeatedly regulated according to a theoretical calculated value to ensure that the whole heat exchange medium pipe network is balanced. However, the pipe network form is difficult to optimize the whole pipe network system, the adjustment is difficult, the adaptability is poor, if the pipe network of the buried part is changed, the condition of the buried pipeline cannot be intuitively known, so that the readjustment of the pipe network balance is more difficult, and the popularization and the application of the ground source heat pump air conditioning system are seriously influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an adjust quick, accurate ground source heat pump air conditioning system's heat transfer medium pipe network.

In order to achieve the above purpose, the utility model adopts the technical scheme that: the underground pipe network comprises an underground pipe which is communicated with a liquid outlet of the liquid inlet liquid separator and a liquid inlet of the liquid return liquid collector, a second control valve is arranged at the connecting end of the underground pipe and the liquid return liquid collector, and a temperature measuring unit is arranged at the connecting end of the underground pipe and the liquid return liquid collector.

Compared with the prior art, the utility model discloses there are following technological effect: the control valve and the temperature measuring unit are arranged at the water return end, the heat exchange time of the heat exchange medium under the ground can be changed by adjusting the liquid return flow and the flow speed of the buried pipe, so that the liquid return temperature of each buried pipe is changed, and after multiple times of adjustment, the liquid return temperature of each buried pipe in the pipe network is almost consistent, so that the heat exchange medium pipe network achieves the optimal heat exchange efficiency. The two components are reasonably arranged, so that the adjustment index of the different-form heat exchange medium pipe network is more clear and the operation is simpler and more convenient, the application effect is optimized while the different-form heat exchange medium pipe network is simplified, and the popularization and the application of the ground source heat pump air conditioner are facilitated.

Drawings

The contents of the description and the references in the drawings are briefly described as follows:

FIG. 1 is a schematic diagram of a heat exchange medium pipe network of a ground source heat pump air conditioning system;

FIG. 2 is a schematic view of an underground piping network;

FIG. 3 is a schematic view of a temperature measuring unit.

In the figure: 1. the system comprises an above-ground pipe network, a 2-buried pipe network, 11-liquid inlet knockout, 12-control valve I, 21-liquid return collector, 22-control valve II, 30-buried pipe, 40-above-ground pipe, 41-circulating pump, 42-heat exchanger, 43-filter, 44-check valve, 45-gate valve, 46-flow regulating valve, 51-electronic temperature measuring induction sheet, 52-control unit, 53-communication unit, 54-air conditioning system control platform.

Detailed Description

The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings.

A heat exchange medium pipe network of a ground source heat pump air conditioning system comprises a ground pipe network 1 and a buried pipe network 2, wherein the buried pipe network 2 comprises a ground pipe 30 communicated with a liquid outlet of a liquid inlet liquid separator 11 and a liquid inlet of a liquid return liquid collector 21, a control valve II 22 is arranged at the connecting end of the ground pipe 30 and the liquid return liquid collector, and a temperature measuring unit 50 is arranged at the connecting end of the ground pipe 30 and the liquid return liquid collector 21. The power source drives the heat exchange medium to enter the buried pipe network 2 from the liquid inlet liquid separator 11 and then flows back into the liquid return liquid collector 21. The heat exchange duration of the heat exchange medium under the ground can be changed by adjusting the liquid return flow and/or the flow velocity of the buried pipe, so that the liquid return temperature can be changed and monitored in real time.

It should be noted that, in this embodiment, the heat exchange medium is selected from water or an aqueous solution, so that when the return water temperature difference of each single buried pipe 30 is within the minimum limit value, the hydraulic balance of the different-stroke heat exchange medium pipe network can be ensured.

In this embodiment, a temperature measuring unit 50 is attached to the outer wall of the second control valve 22. Thus, the second control valve 22 can monitor and adjust the liquid return flow and/or flow rate of the corresponding buried pipe 30; the temperature measuring unit 50 is arranged on the outer wall of the valve body, and can indirectly obtain the temperature of the returned liquid through the temperature of the outer wall of the valve body. It should be noted that, the hydraulic balance adjustment of the external-stroke heat exchange medium pipe network of the ground source heat pump air conditioning system focuses on the difference of the return liquid temperatures of the buried pipes 30, and the target value of the return liquid temperature varies with the climate, weather, etc. In this embodiment, the second control valve 22 is located in the same machine room, the environmental conditions are the same, and the second control valve 22 and the temperature measuring unit 50 are used in the same type, so that the temperature measurement error can be ignored as long as the temperature difference value is within the limited range.

Furthermore, a first control valve 12 is arranged at the connecting end of the buried pipe 30 and the liquid inlet separator 11, and a temperature measuring unit 50 is additionally arranged on the outer wall of the valve body of the first control valve 12.

Specifically, the temperature measuring unit 50 comprises an electronic temperature measuring sensing piece 51 attached to the outer wall of the valve body, the electronic temperature measuring sensing piece 51 is electrically connected with the control unit 52, the control unit 52 is further electrically connected with a communication unit 53, and the communication unit 53 transmits temperature data to the control platform 54 of the ground source heat pump air conditioning system. In order to facilitate the accuracy of control and data transmission, in this embodiment, the second control valve 22 is an electric control valve, and the temperature measuring unit 50 is arranged along the same path as the data transmission line and the power line of the electric control valve. In other embodiments, the communication unit 53 and the ground source heat pump air conditioning system control platform 54 may also use wireless transmission.

Specifically, the temperature measuring unit 50 comprises an electronic temperature measuring sensing piece 51 attached to the outer wall of the valve body, the electronic temperature measuring sensing piece 51 is electrically connected with the control unit 52, the control unit 52 is further electrically connected with a communication unit 53, and the communication unit 53 wirelessly transmits temperature data to the control platform 54 of the ground source heat pump air conditioning system.

Specifically, the above-ground pipe network 1 comprises an above-ground pipe 40 communicating a liquid flow inlet of the liquid inlet separator 11 with a liquid flow outlet of the liquid return collector 21, a circulating pump 41 and a heat exchanger 42 are sequentially arranged on a pipeline of the above-ground pipe 40, a filter 43 is connected to a liquid inlet end of the circulating pump 41, a check valve 44 is connected to a liquid outlet end of the circulating pump 41, and a gate valve 45 and a flow regulating valve 46 are respectively arranged at the liquid inlet end and the liquid outlet end of the circulating pump 41.

When the heat exchange medium pipe network of the ground source heat pump air conditioning system is applied to carry out fluid balance adjustment, the method comprises the following steps:

B. operating a ground source heat pump air conditioning system and monitoring the liquid return temperature of each buried pipe 30;

C. after the return liquid temperatures of the buried pipes 30 are stable, if the return liquid temperature difference of the buried pipes 30 is larger than a limit value, selecting the mode or average of the return liquid temperatures as a target temperature, and adjusting a valve gate at the return liquid end of the buried pipe 30 with the return liquid temperature being too high or too low, namely adjusting the control valve II 22, so that the return liquid flow and/or flow rate of the pipe are/is changed adaptively;

D. and (8) repeating the step B, C until the liquid return temperature difference values of the buried pipes 30 are smaller than the limit value, and finishing the fluid balance adjustment of the heat exchange medium pipe network.

Preferably, when the first adjustment or the second adjustment is carried out, before the step B, a step A is also carried out: and adjusting a valve gate at the liquid return end of the buried pipe 30, namely adjusting the control valve II 22, so that the liquid inlet flow of each buried pipe 30 is the designed flow.

In the step C, when the fluctuation range of the measured temperature value of the liquid return end of a single buried pipe 30 is within 1 ℃, the liquid return temperature of the corresponding buried pipe 30 is considered to be stable.

In the step C, the limit value of the difference of the liquid return temperatures is +/-1 ℃.

In the step C, when the liquid return temperature of the local buried pipe 30 is higher than the target liquid return temperature and the difference value between the target liquid return temperature and the target liquid return temperature is higher than a limit value, the liquid return flow and/or the flow speed of the pipe are/is increased; when the return temperature of the buried pipe 30 is lower than the target return temperature and the difference between the target return temperature and the target return temperature is greater than a limit value, the return flow and/or flow rate of the pipe is reduced.

Claims

1. The utility model provides a ground source heat pump air conditioning system's heat transfer medium pipe network, includes ground pipe network (1) and buried pipe network (2), its characterized in that: the buried pipe network (2) comprises a buried pipe (30) communicated with a liquid outlet of the liquid inlet liquid separator (11) and a liquid inlet of the liquid return liquid collector (21), a second control valve (22) is arranged at the connecting end of the buried pipe (30) and the liquid return liquid collector (21), and a temperature measuring unit (50) is arranged at the connecting end of the buried pipe (30) and the liquid return liquid collector (21).

2. The heat exchange medium pipe network of the ground source heat pump air conditioning system as claimed in claim 1, wherein: the temperature measuring unit (50) is attached to the outer wall of the valve body of the second control valve (22).

3. The ground source heat pump air conditioning system heat exchange medium pipe network of claim 2, wherein: the temperature measuring unit (50) comprises an electronic temperature measuring sensing sheet (51) attached to the outer wall of the valve body, the electronic temperature measuring sensing sheet (51) is electrically connected with the control unit (52), the control unit (52) is further electrically connected with a communication unit (53), and the communication unit (53) transmits temperature data to the air conditioning system control platform (54).

4. The heat exchange medium pipe network of the ground source heat pump air conditioning system as claimed in claim 3, wherein: the second control valve (22) is an electric regulating valve, and the temperature measuring unit (50) is consistent with the data transmission line and the power supply line of the electric regulating valve in arrangement path.

5. The heat exchange medium pipe network of the ground source heat pump air conditioning system as claimed in claim 1, wherein: the ground pipe network (1) comprises a ground pipe (40) communicated with a liquid flow inlet of the liquid inlet knockout (11) and a liquid flow outlet of the liquid return collector (21), a circulating pump (41) and a heat exchanger (42) are sequentially arranged on a pipeline of the ground pipe (40), a liquid inlet end of the circulating pump (41) is connected with a filter (43), a liquid outlet end of the circulating pump (41) is connected with a check valve (44), and a gate valve (45) and a control valve (46) are respectively arranged at the liquid inlet end and the liquid outlet end of the circulating pump (41).