CN207317157U - A kind of primary retirn air air-conditioning system based on soil source heat pump - Google Patents

Abstract

A primary return air-conditioning system based on a soil source heat pump relates to an air-conditioning system to solve the problems that the existing air-conditioning system has low energy utilization rate, poor indoor air quality and cannot satisfy human comfort. It includes underground pipes, air source heat pumps, return air pipes, indoor air supply pipes and air outlet pipes; one end of the underground pipes is placed on the ground, and the other end of the underground pipes is divided into two branch pipes, one of which is connected to the ground. The other branch pipe is connected to the indoor air supply pipe arranged indoors. A regulating valve is installed on the other branch pipe. The air outlet of the air source heat pump is connected to the indoor air supply pipe. The outlet of the air source heat pump The air outlet 2 is connected with the air outlet pipe arranged outside, and the air return pipe is connected with the air return port of the air source heat pump. The utility model is used for indoor air conditioning.

Description

A Primary Return Air Conditioning System Based on Ground Source Heat Pump

technical field

The utility model relates to an air conditioning system, in particular to a primary return air conditioning system based on a soil source heat pump.

Background technique

In recent years, people have higher and higher requirements for building comfort, and various air-conditioning systems have been rapidly developed and applied, but there are some problems:

1. Excessive energy consumption and low energy utilization efficiency;

2. The indoor air quality cannot be well controlled, and its comfort is poor, which is not conducive to human health;

3. The COP of the system (generally about 3) is generally low, the cost is high, and the economic benefits of users are low;

4. The application effect of the system is not very good, and it is difficult to keep the room temperature stable.

Utility model content

The utility model provides a primary return air-conditioning system based on a soil source heat pump, in order to solve the problems that the existing air-conditioning system has low energy utilization rate, poor indoor air quality and cannot satisfy the comfort of human body.

The technical scheme of the utility model is:

A primary return air-conditioning system based on a soil source heat pump includes an underground pipe, an air source heat pump, a return air pipe, an indoor air supply pipe, and an air outlet pipe; one end of the underground pipe is placed on the ground, and the other end of the underground pipe It is divided into two branch pipes, one branch pipe is connected with the air source heat pump arranged on the ground, and the other branch pipe is connected with the indoor air supply pipe arranged indoors, and a regulating valve is installed on the other branch pipe, and the air outlet of the air source heat pump is one Connect the indoor air supply pipe, the air outlet 2 of the air source heat pump is connected with the air outlet pipe arranged outside, and the return air pipe is connected with the air return port of the air source heat pump.

The beneficial effects of the utility model compared with the prior art are:

1. Energy saving, no pollution, good environmental protection. Use shallow soil energy to cool or preheat fresh air, greatly reducing the load on air conditioners;

2. The fresh air volume can be adjusted freely, which is convenient for users to use, increases the fresh air volume, dilutes the air in the building, and improves the air quality;

3. The soil source heat pump method composed of buried pipes and air source heat pumps is adopted. Since the soil temperature below 15 meters above the ground is stable throughout the year and is approximately equal to the annual average temperature, it can provide relatively low condensation temperature and high temperature in summer and winter respectively. The evaporation temperature is higher, so it can achieve better energy-saving effect than the air source heat pump, and at the same time, it avoids the frosting problem of the air source heat pump used in low temperature conditions.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the utility model.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the technical scheme of the present utility model is described further

Referring to Fig. 1, a primary air return air conditioning system based on a soil source heat pump includes an underground buried pipe 1, an air source heat pump 6, a return air pipe 5, an indoor air supply pipe 2 and an air outlet pipe 7;

One end of the buried pipe 1 is placed on the ground, and the other end of the buried pipe 1 is divided into two branch pipes, one branch pipe is connected to the air source heat pump 6 arranged on the ground, and the other branch pipe is connected to the indoor air supply pipe 2 arranged indoors The other branch pipe is equipped with a regulating valve 4, the first air outlet of the air source heat pump 6 is connected to the indoor air supply pipe 2, the second air outlet of the air source heat pump 6 is connected to the outdoor air outlet pipe 7, and the return air The pipe 5 is connected to the air return port of the air source heat pump 6 .

The earth absorbs solar radiation heat energy and stores it all year round, so the deep soil has a relatively stable temperature. The temperature of the constant temperature layer soil in most parts of my country is between 15°C and 20°C, which is lower than the ambient temperature in summer and higher than the ambient temperature in winter. The soil source heat pump system uses this feature to release heat to the soil in summer and absorb heat from the soil in winter, so as to achieve the purpose of cooling and heating.

If the soil source heat pump of buried pipe type ground source heat pump is used, since the annual soil temperature below 15 meters above the surface is stable and approximately equal to the annual average temperature, it can provide relatively low condensation temperature and high evaporation temperature in summer and winter respectively. Therefore, it can achieve a better energy-saving effect than the general air source heat pump 6, and at the same time avoid the problem of frosting when the heat pump is used in low temperature conditions, so that it can be applied in a wider range. Secondly, since groundwater is not directly extracted, it can effectively avoid damage to groundwater resources, and it is a cold and heat source method for rationally developing and utilizing geothermal resources; at the same time, cooling in summer or heating in winter can be performed by using the characteristics of thermal energy in shallow soil It can greatly reduce the load of the air conditioner, improve the efficiency of energy utilization, and achieve both energy saving and environmental protection. Reached above-mentioned purpose.

Referring to FIG. 1 , as a possible implementation, the middle pipe section 1 - 1 of the buried pipe 1 is a snake pipe. Such setting is beneficial to heat transfer compared with vertical buried pipes. Can make full use of the energy of the soil. Preferably, the coiled pipe is arranged obliquely. The angle between the inclined coil and the horizontal ground is 45°. With such setting, the heat transfer efficiency is greatly improved, and the heat transfer efficiency is increased by more than 45%.

Referring to FIG. 1 , in order to increase the indoor fresh air volume and meet the indoor comfort requirements, as another possible implementation, the indoor air supply pipe 2 is provided with a plurality of air supply ports 3 . With such design, multiple air outlets 3 are beneficial to heat exchange.

Referring to Fig. 1 explanation, a regulating valve 4 is also installed on a branch pipe. In this way, the setting of the regulating valve 4 is beneficial to adjust the amount of air after heat exchange in the underground pipe 1 and send it to the air source heat pump 6 . The two regulating valves 4 cooperate with each other to complete the adjustment of the indoor fresh air volume and meet the needs of human comfort. Preferably, the regulating valve 4 is an electric regulating valve. With such setting, it is convenient to use and control, and meets actual needs.

work process

In different seasons, heating or cooling can be performed by changing the direction of operation of the air source heat pump, which is simple and convenient. The solid arrow indicates the flow direction of the air entering the air conditioning system or operating in the air conditioning system, and the single arrow indicates entering the underground pipe 1 outside air, and the hollow arrow indicates the return air flow direction. One end placed on the ground of the buried pipe 1 is also provided with a filter screen to ensure that the pipeline system is not blocked. In summer, let the outdoor air enter the underground pipe 1 through the air inlet first, use the cold energy of the soil to cool the air, and then send the cooled air into the air through the two branch pipe systems of the underground pipe 1 The source heat pump 6 is used for processing, and the other part is directly mixed with the cold air from the air source heat pump 6 and sent into the room through the indoor air supply pipe 2 . The fresh air volume can be adjusted through the regulating valve 4. The system can adjust the air flow through the regulating valve 4 to adjust the wind speed, and then indirectly adjust the cooling capacity and temperature of the room to meet the comfort of the human body. condition. Finally, the hot air produced by the heat pump is discharged to the outside through the air outlet pipe 7, and at the same time, the old air returns to the air source heat pump 6 through the return air pipe 5 for utilization, so that the air volume can be recycled.

In winter, let the outdoor air enter the underground pipe 1 through the air inlet first, use the heat possessed by the soil to preheat the air, and then send part of the preheated air into the air source through the two branch pipe systems of the underground pipe 1 The other part of the heat pump 6 is directly mixed with the hot air from the air source heat pump and sent into the room through the indoor air supply pipe 2 . The fresh air volume can be adjusted through the regulating valve 4. Similarly, the system can adjust the air intake flow through the regulating valve 4 to adjust the wind speed, and then indirectly adjust the cooling capacity and temperature of the room to meet the comfort of the human body. sexual conditions. Finally, the cold air produced by the air source heat pump 6 is discharged to the outside through the air outlet pipe 7, and at the same time, the old air returns to the air source heat pump 6 through the return air pipe 5 for utilization, realizing the recycling of the system air volume.

The utility model has been disclosed as above with preferred implementation cases, but it is not intended to limit the utility model. Any skilled person who is familiar with the profession can implement the above implementation according to the technical essence of the utility model without departing from the scope of the technical solution of the utility model. Any simple modifications, equivalent changes and modifications made in the case still belong to the scope of the technical solutions of the present utility model.

Claims (7)

1. A primary air-return air-conditioning system based on a soil source heat pump, characterized in that it comprises an underground buried pipe (1), an air source heat pump (6), a return air pipe (5), an indoor air supply pipe (2) and Outlet pipe (7); One end of the buried pipe (1) is placed on the ground, and the other end of the buried pipe (1) is divided into two branch pipes, one branch pipe is connected to the air source heat pump (6) arranged on the ground, and the other branch pipe is connected to the indoor heat pump (6). The indoor air supply pipe (2) is connected, and a regulating valve (4) is installed on the other branch pipe. The air outlet of the air source heat pump (6) is connected to the indoor air supply pipe (2), and the air source heat pump (6) The second air outlet is connected to the air outlet pipe (7) arranged outside, and the air return pipe (5) is connected to the air return port of the air source heat pump (6). 2. A primary return air-conditioning system based on a soil source heat pump according to claim 1, characterized in that: the middle pipe section (1-1) of the buried pipe (1) is a snake pipe. 3. A primary return air-conditioning system based on a soil source heat pump according to claim 2, characterized in that the coiled pipes are arranged obliquely. 4. A primary return air-conditioning system based on a soil source heat pump according to claim 3, wherein the angle between the obliquely arranged coiled pipe and the horizontal ground is 45°. 5. A soil source heat pump based primary air return air conditioning system according to claim 1, 2, 3 or 4, characterized in that: the indoor air supply pipe (2) is provided with a plurality of air supply ports (3). 6. A primary return air-conditioning system based on a soil source heat pump according to claim 5, characterized in that a regulating valve (4) is also installed on the one branch pipe. 7. A primary air return air conditioning system based on a soil source heat pump according to claim 6, characterized in that: the regulating valve (4) is an electric regulating valve.