CN203443177U - Double-heat-source evaporator for heat pump - Google Patents

Abstract

The utility model is a dual heat source evaporator for a heat pump, which is composed of a copper tube, fins and a fan. The copper tube is made of two small copper tubes inside a large copper tube. However, the copper tubes mainly include refrigerant copper tubes and hot water copper tubes. The hot water copper tube is located in the central symmetrical area of the fin, and the refrigerant copper tube surrounds the hot water copper tube; the refrigerant copper tube, the hot water copper tube and the solar water heating system form a closed loop. It is an evaporator integrating water source and air source evaporator. The structure of the dual heat source evaporator is small and compact, which can reduce the number of evaporators in the heat pump system, reduce the initial investment and also reduce the floor area; in a dual heat source evaporator, heat exchange on the water side and wind side can be realized, making the system The piping of the water system becomes simple; and the heat exchange on the water side can be performed at the same time as the heat exchange on the air side, which greatly improves the heat exchange efficiency.

Description

Dual heat source evaporator for heat pump

technical field

The utility model relates to an evaporator, in particular to an evaporator used in various occasions requiring heat transfer, especially in environments where low-temperature heat can be utilized. the

Background technique

With the country's continuous advancement of energy conservation and emission reduction, the development of new energy and energy-saving technologies has become a top priority in our country. The low-temperature heat source of a conventional heat pump system is single, and common ones are a single water-source heat source and air-source heat source, but different heat sources have different working characteristics, and it is inevitable to use them as low-temperature heat pump systems in regions Geographically restricted. At the same time, the system has many problems such as single function, low solar heat collection efficiency, and low comprehensive utilization rate of the system. In order to solve these shortcomings, we propose a dual heat source evaporator for heat pumps. This dual heat source evaporator is not only simple and compact in structure, but also only needs one evaporator, which greatly saves space and cost; When the strength does not meet the standard, heat exchange on the water side can also be performed while performing heat exchange on the air side, which greatly improves the heat exchange efficiency. the

Utility model content

Aiming at the deficiencies in the prior art, the utility model provides a dual heat source evaporator for a heat pump. Specifically, a sleeve-type heat exchange tube can be added inside the heat exchange tube of the original evaporator. In this way, the refrigerant can exchange heat on the water side and the wind side in the same evaporator, which is equivalent to two heat exchangers. The structure of the dual heat source evaporator is small and compact, which can reduce the number of evaporators in the heat pump system, reduce the initial investment and also reduce the floor space; in a dual heat source evaporator, heat exchange on the water side and wind side can be realized, making the system The piping of the water system becomes simple; and the heat exchange on the water side can be carried out at the same time as the heat exchange on the air side, which greatly improves the heat exchange efficiency. the

A dual heat source evaporator for a heat pump is composed of copper tubes, fins and fans. The copper tubes are made of two small copper tubes inside a large copper tube. The copper tubes are bent into U-shaped parts and pass through the fins. The tubes mainly include refrigerant copper tubes and hot water copper tubes. The hot water copper tubes are located in the central symmetrical area of the fins, and the refrigerant tubes are respectively located around the hot water tubes; the refrigerant copper tubes, hot water copper tubes and solar water heating system form a closed loop. It is an evaporator integrating water source and air source evaporator. The dual heat source evaporator adopts a casing heat exchanger, and fins are added to the casing heat exchanger. The refrigerant is in the middle of the casing, and the hot water from the solar water heating system is in the inner tube of the casing. The heat dissipation fin is characterized in that the refrigerant copper tube is connected with the fin, and the hot water copper tube is sleeved in the refrigerant copper tube. In this way, the heat pump unit conducts heat from the hot water copper pipe to the refrigerant copper pipe during heating, thereby increasing the evaporation temperature of the heat pump unit; during the defrosting process, the fins can absorb the heat in the air and the heat in the hot water pipe Heat, thereby speeding up the speed of defrosting. the

A dual heat source evaporator for a heat pump is characterized in that the material of the copper tube is red copper. The specification of the refrigerant copper tube is 30mm×0.8mm, and the specification of the hot water copper tube is 10mm×0.7mm. The pitch of the fins is 3.2mm. the

The beneficial effect of the utility model is that when the solar radiation energy is sufficient, the hot water generated can meet the cooling load of the heat pump system. Indoor heating. When the solar radiation is abundant, the excess hot water is stored in the water storage tank to store heat. When the solar radiation is insufficient, the solar water heating system and the storage tank will simultaneously provide heat to the heat pump system. When the solar radiation is insufficient and the outdoor temperature is not lower than 3°C, the water-side heat exchange and wind-side heat exchange can be turned on at the same time. At this time, the refrigerant can get heat from the hot water in the inner pipe and the outside air at the same time. When the solar radiation is lower, open the drain valve in the dual heat source evaporator to drain the water in the inner tube of the casing (at this time, the air temperature is lower to prevent the water in the tube from freezing and bursting the inner tube), and turn on the fan at the same time. , the heat pump system will use air as the heat source and absorb heat from the outdoor air to meet the cooling load of the air conditioning system. the

Description of drawings:

Fig. 1 is a schematic structural diagram of a dual heat source evaporator for a heat pump;

Among them: ①, fin; ②, copper tube; ③, fan;

Figure 2 is a cross-sectional view of the casing heat exchanger;

Fig. 3 is a cross-sectional view of the sleeve-type heat exchange tube;

Among them: 11. Hot water; 12. Air; 13. Fins; 14. Casing; 15. Refrigerant.

Detailed ways:

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described.

Specific example: In winter, we set a temperature value such as 5°C according to the environmental conditions in Zhuzhou. When the outdoor air temperature is greater than 5°C, the thermal efficiency of the air source heat pump is high at this time, and there is no need to turn on the water side for heat exchange, and the wind side The heat exchange can meet the heat load requirements of the air conditioning system. At this time, the hot water generated by the solar water heating system can be supplied to the building’s domestic hot water and stored in the hot water tank; when the outdoor temperature is lower than 5°C but the evaporator fins have not yet frosted, the water side and the fan can be turned on at the same time. Side heat exchange; when the outdoor air temperature is too low, the evaporator fins are prone to frost when the wind side heat exchange is turned on, the fan is turned off, the heat exchange on the wind side is stopped, and the valve of the water storage tank is opened to allow hot water to enter the evaporator for cooling. heat exchange, and let the air side heat exchanger defrost itself. the

Claims (5)

1. two thermal source evaporimeters for a heat pump, by copper pipe, fin and blower fan, formed, it is characterized in that: the copper pipe of this evaporimeter is divided into hot water copper pipe and cold-producing medium copper pipe, what copper pipe adopted is 2 little copper pipes of large copper pipe inner sleeve, copper pipe curves U-shaped portion part and passes through fin and mistake, hot water copper pipe is positioned at the Central Symmetry region of fin, and cold-producing medium copper pipe surrounds hot water copper pipe; Cold-producing medium copper pipe, hot water copper pipe and heat pump have formed a closed loop; Blower fan is positioned at fin over against side, and blower fan can make air and fin carry out quick heat exchange like this.

2. two thermal source evaporimeters for heat pump according to claim 1, it is characterized in that: this pair of thermal source evaporimeter adopts double pipe heat exchanger, and at the additional fin of double-tube heat exchanger, in the middle of sleeve pipe, be cold-producing medium, in sleeve pipe inner tube, be the hot water from solar water heating system; Radiating fin is characterised in that cold-producing medium copper pipe and fin link together, and is enclosed within cold-producing medium copper pipe in hot water copper pipe.

3. two thermal source evaporimeters for heat pump according to claim 1, is characterized in that: the material of copper pipe is red copper.

4. two thermal source evaporimeters for heat pump according to claim 1, is characterized in that: the specification of cold-producing medium copper pipe is 30mm * 0.8mm, and the specification of hot water copper pipe is 10mm * 0.7mm.

5. two thermal source evaporimeters for heat pump according to claim 1, is characterized in that: the spacing of fin is 3.2mm.

Images