CN204718175U - A kind of source pump - Google Patents

Abstract

The utility model provides a heat pump unit, which includes a main heat exchanger, a first auxiliary heat exchanger, a second auxiliary heat exchanger, a first compressor, a second compressor, a first four-way valve, a second four-way valve, and a second compressor. through valve, first flow control valve, second flow control valve and medium uniform mixer. A first flow control valve is also provided between the main heat exchanger and the first auxiliary heat exchanger. The main heat exchanger and the two A flow control valve is provided between each auxiliary heat exchanger. The flow control valve is connected to the medium uniform mixer, and the medium uniform mixer is connected to the main heat exchanger. The utility model is provided with flow control valves respectively at the inlets and outlets of the two auxiliary heat exchangers. By arranging a uniform mixer, the medium at the outlet of the two auxiliary heat exchangers is evenly mixed, so that the medium can enter at a uniform temperature. The main heat exchanger ensures the service life of the main heat exchanger. Even if the heat exchange temperature difference between the two auxiliary heat exchangers is large, the heat exchange effect of each can be guaranteed.

Description

A heat pump unit

technical field

The utility model relates to a mechanical technology, in particular to a heat pump unit, which belongs to the technical field of refrigeration machinery.

Background technique

The heat pump unit is a cycle system composed of compressor-heat exchanger-throttle-heat absorber-compressor and other devices. The refrigerant circulates in the system under the action of the compressor. It completes the process of increasing the pressure and temperature of the gaseous state in the compressor (the temperature is as high as 100°C). After entering the heat exchanger, it exchanges heat with water, is cooled and converted into a liquid state, and when it runs to the heat absorber, the liquid state rapidly The endothermic evaporation is transformed into a gas state again, and the temperature drops at the same time. At this time, the air around the heat absorber will continuously transfer low-temperature heat to the refrigerant. The continuous circulation of the refrigerant realizes the process of converting the low-temperature heat in the air into high-temperature heat and heating the cold water.

Chinese patent (application number: 200610085335.3) provides an air-cooled water-cooled hot water unit, which is an air-cooled water-cooled hot water unit that is connected in parallel with two heat source sides and can absorb heat energy from waste hot water for heating , the water source-water source water-cooled evaporator is equipped with water inlet and outlet, the water-cooled evaporator is used to absorb the heat energy in the waste water, and then the water-cooled condenser converts this energy into the refrigerant medium, and then passes through the condenser It is converted into domestic hot water to achieve the purpose of supplying domestic hot water. At the same time, in summer, the inlet and outlet water of the water-cooled evaporator are connected to the indoor pipeline, so as to achieve the purpose of cooling the room. In order to prevent insufficient heating of waste water, in An air-cooled evaporator is connected in parallel with the water-cooled evaporator in the refrigeration cycle, which improves the heating effect on the one hand and supplements the heating on the other hand. Chinese patent (application number: 200910021098.8) provides an air-cooled double evaporator heat pump unit, which can simultaneously supply heat and cold to two different user terminals. But unfortunately, due to the limitations of its system itself. The evaporation and condensation temperatures on the two user-side radiators are the same, that is, they cannot be adjusted in a wide range. At the same time, its evaporation temperature or condensation temperature needs to be consistent with the most unfavorable evaporation or temperature of the two user-end heat exchangers. This reduces the operating efficiency of the heat pump system and causes energy waste. In addition, although there have been some compressors of different types and their serial radiators connected in parallel at the supply end to achieve the evaporation temperature or condensation temperature of the two supply ends Different heat exchange temperatures of the radiators are achieved, and finally the flexible and adjustable supply of two different qualities of cooling capacity is realized.

However, due to the limitation of the structure of the above heat pump units, when the heat exchange temperature of the two required radiators is quite different, the effect of changing the two radiators only by the model and power of the compressor is still not good. It will easily lead to poor heat exchange effect of one of them, which cannot meet people's needs for different radiator temperatures, and when the temperature difference between the two radiators is large, it will easily lead to the service life of the evaporator and affect the service life of the entire heat pump unit.

In order to solve the above problems in the prior art, the utility model provides a heat pump unit, which is provided with flow control valves on the inlet and outlet of the two auxiliary heat exchangers, and controls the flow rate of each auxiliary heat exchanger through the flow control valves. Moreover, by setting up a homogeneous mixer, the medium at the outlet of the two secondary heat exchangers is uniformly mixed, so that the medium can enter the main heat exchanger at a uniform temperature, which not only ensures the use of the main heat exchanger Moreover, it can improve the heat exchange effect of the main heat exchanger, even if the heat exchange temperature difference between the two auxiliary heat exchangers is large, the respective heat exchange effects can be guaranteed.

Contents of the invention

In view of the above situation, in order to solve the defects of the prior art, the purpose of this utility model is to provide a heat pump unit, which includes a main heat exchanger, a first auxiliary heat exchanger, a second auxiliary heat exchanger, a first compressor , the second compressor, the first four-way valve, the second four-way valve, the first flow control valve, the second flow control valve and the medium homogeneous mixer, and the first secondary heat exchanger is set at the first Between the first port of the four-way valve and one port of the main heat exchanger, the second port of the first four-way valve is connected to the other end of the main heat exchanger, and the third port of the first four-way valve The interface and the fourth interface are respectively connected to both ends of the first compressor, and the second auxiliary heat exchanger is arranged between the first interface of the second four-way valve and a port of the main heat exchanger , the second port of the second four-way valve is connected to the other end of the main heat exchanger, the third port and the fourth port of the second four-way valve are respectively connected to both ends of the second compressor , characterized in that, a first flow control valve is further arranged between the main heat exchanger and the first auxiliary heat exchanger, and a flow control valve is further arranged between the main heat exchanger and the second auxiliary heat exchanger. There is a second flow control valve, the outlet of the first flow control valve and the outlet of the second flow control valve are connected to one end of the medium homogeneous mixer, and the other end of the medium homogeneous mixer is connected to the Main heat exchanger connection.

Further, preferably, a first throttling valve and a first regulating valve are sequentially arranged in series between the first auxiliary heat exchanger and the first flow control valve.

Further, preferably, a second throttling valve and a second regulating valve are sequentially arranged in series between the second auxiliary heat exchanger and the second flow control valve.

Further, preferably, the utility model further includes a gas-liquid separator, and a gas-liquid separator is also connected between the medium homogeneous mixer and the main heat exchanger.

Further, preferably, a third flow control valve is provided between the first four-way valve and the first auxiliary heat exchanger, and a third flow control valve is provided between the second four-way valve and the second auxiliary heat exchanger. A fourth flow control valve is also provided.

The beneficial effects of the utility model:

The utility model provides a heat pump unit, which is provided with flow control valves on the inlet and outlet of the two auxiliary heat exchangers, through which the flow control valves are used to control the heat exchange of each auxiliary heat exchanger, and, by setting uniform The mixer realizes the uniform mixing of the medium at the outlet of the two secondary heat exchangers, so that the medium can enter the main heat exchanger at a uniform temperature, which not only ensures the service life of the main heat exchanger, but also improves the performance of the main heat exchanger. Even if the heat exchange temperature difference between the two secondary heat exchangers is large, the heat exchange effect of each can be guaranteed.

Description of drawings

Fig. 1 is a structural schematic diagram of a heat pump unit provided by the utility model;

Among them, 1. Main heat exchanger, 2. First auxiliary heat exchanger, 3. Second auxiliary heat exchanger, 4. First compressor, 5. Second compressor, 6. First four-way valve, 7 , the second four-way valve, 8, the first throttle valve, 9, the first regulating valve, 10, the second throttle valve, 11, the second regulating valve, 12, the first flow control valve, 13, the second flow Control valve, 14, medium uniform mixer, 15, gas-liquid separator, 16, third flow control valve, 17, fourth flow control valve.

Detailed ways

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

As shown in Figure 1, the utility model provides a heat pump unit, which includes a main heat exchanger 1, a first auxiliary heat exchanger 2, a second auxiliary heat exchanger 3, a first compressor 4, a second compressor 5. The first four-way valve 6, the second four-way valve 7, the first flow control valve 12, the second flow control valve 13 and the medium homogeneous mixer 14, and the first auxiliary heat exchanger 2 is set on the first four-way valve Between the first port of 6 and one port of the main heat exchanger 1, the second port of the first four-way valve 6 is connected to the other end of the main heat exchanger 1, the third port of the first four-way valve 6 and the fourth The interfaces are respectively connected to both ends of the first compressor 4, and the second secondary heat exchanger 3 is arranged between the first interface of the second four-way valve 7 and a port of the main heat exchanger 1, and the second four-way The second interface of the valve 7 is connected to the other end of the main heat exchanger 1, the third interface and the fourth interface of the second four-way valve 7 are respectively connected to the two ends of the second compressor 5, the main heat exchanger 1 and the first A first flow control valve 12 is also arranged between the auxiliary heat exchangers 2, a second flow control valve 13 is also arranged between the main heat exchanger 1 and the second auxiliary heat exchanger 3, and the outlet of the first flow control valve 12 The outlet of the second flow control valve 13 is connected to one end of the medium homogeneous mixer 14 , and the other end of the medium homogeneous mixer 14 is connected to the main heat exchanger 1 .

In this embodiment, a first throttling valve 8 and a first regulating valve 9 are sequentially arranged in series between the first secondary heat exchanger 2 and the first flow control valve 12 .

A second throttling valve 10 and a second regulating valve 11 are arranged in series between the second secondary heat exchanger 3 and the second flow control valve 13 .

In addition, the utility model also includes a gas-liquid separator 15, and the gas-liquid separator 15 is also connected between the medium homogeneous mixer 14 and the main heat exchanger 1 . In order to further control the heat exchange temperature capabilities of the respective auxiliary heat exchangers, a third flow control valve 16 is also provided between the first four-way valve 6 and the first auxiliary heat exchanger 2, and the second four-way valve 7 and the first A fourth flow control valve 17 is also arranged between the two secondary heat exchangers 3 .

When working, when the two sub-heat exchangers need different temperatures, the flow control valves set on the respective inlets and outlets can effectively control the heat transfer capacity of each sub-heat exchanger, and then the medium is evenly mixed by setting It realizes the uniform mixing of the medium at the outlet of the two secondary heat exchangers, so that the medium can enter the main heat exchanger at a uniform temperature, ensuring the service life of the main heat exchanger, and can improve the performance of the main heat exchanger Heat exchange effect, even if the heat exchange temperature difference between the two secondary heat exchangers is large, the respective heat exchange effects can be guaranteed.

Claims (5)

1. a source pump, it comprises main heat exchanger, first auxiliary heat exchanger, second auxiliary heat exchanger, first compressor, second compressor, first cross valve, second cross valve, first flow control valve, second control valve and homogeneous media blender, the first described auxiliary heat exchanger is arranged between the first interface of described first cross valve and a port of main heat exchanger, second interface of described first cross valve connects the other end of described main heat exchanger, 3rd interface of described first cross valve and the 4th interface are connected to the two ends of described first compressor, the second described auxiliary heat exchanger is arranged between the first interface of described second cross valve and a port of main heat exchanger, second interface of described second cross valve connects the other end of described main heat exchanger, 3rd interface of described second cross valve and the 4th interface are connected to the two ends of described second compressor, it is characterized in that, first flow control valve is also provided with between described main heat exchanger and described first auxiliary heat exchanger, second control valve is also provided with between described main heat exchanger and described second auxiliary heat exchanger, the outlet of described first flow control valve and the outlet of described second control valve are connected on one end of described homogeneous media blender, the other end of described homogeneous media blender is connected with described main heat exchanger.

2. a kind of source pump according to claim 1, is characterized in that, has also been arranged in series first throttle valve and the first control valve successively between described first auxiliary heat exchanger and described first flow control valve.

3. a kind of source pump according to claim 1, is characterized in that, has also been arranged in series second throttle and the second control valve successively between described second auxiliary heat exchanger and described second control valve.

4. a kind of source pump according to claim 1, is characterized in that, also comprise gas-liquid separator, is also connected with gas-liquid separator between described homogeneous media blender and described main heat exchanger.

5. a kind of source pump according to claim 1-4 any one, it is characterized in that, also be provided with the 3rd flow control valve between described first cross valve and described first auxiliary heat exchanger, between described second cross valve and described second auxiliary heat exchanger, be also provided with the 4th flow control valve.