Heat pump system with ejector and three vortex tubes

Abstract

A heat pump system with an ejector and three vortex tubes comprises a compressor and an evaporator, an outlet of the compressor is communicated with an inlet of the evaporator through a first pipeline, the inlet of the compressor is communicated with an outlet of the evaporator through a second pipeline, and the heat pump system further comprises a vortex tube set. The first pipeline is further provided with an ejector, an inlet of the vortex tube set is communicated with the second pipeline through a third pipeline, a hot end outlet is communicated with an inlet of the compressor through a fourth pipeline, and a cold end outlet is connected with an injection flow inlet of the ejector through a fifth pipeline. And the second pipeline and the third pipeline are respectively provided with a first control valve and a second control valve. The performance of the heat pump system can be better improved through the temperature separation effect of the vortex tubes, and temperature control during refrigerating and heating is achieved by arranging the vortex tube set and a plurality of control valves; and the multi-cooling function is achieved, namely the evaporator provides low temperature, the cooler provides low temperature, and the working conditions and environments with various temperature requirements are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat pump system technical field, concretely is a kind of heat pump system with ejector and three vortex pipes. BACKGROUND

[0002] With economic development and production demand, the status of heat pump system in production and life is increasingly promoted, and the measure of "coal to electricity" has been fully promoted. The commonly used heat pump system at present is mainly composed of compressor, condenser, evaporator and throttling valve, and the conversion of refrigeration and heating is realized by changing the flow direction of refrigerant in the system, but this heat pump system is more suitable for daily life of residents, and it is difficult to meet the complex industrial production demand. When heat pump refrigeration, there are large compression ratio, high loss, low efficiency, high load operation and other disadvantages; When heat pump heating, there is not high enough temperature, it is difficult to meet the heating requirement, and the existing single-compressor heat pump system generally does not have the functions of "one machine multiple cooling" or "on-demand temperature control". INVENTION CONTENTS

[0003] To solve the technical problems of low refrigeration / heating effect and lack of "one machine multiple cooling" or "on-demand temperature control" function in the prior art, the utility model provides a heat pump system with ejector and three vortex pipes.

[0004] The utility model technical scheme is as follows:

[0005] A heat pump system with ejector and three vortex pipes, comprising a compressor and an evaporator, the outlet of the compressor is communicated with the inlet of the evaporator through a first pipeline, the inlet is communicated with the outlet of the evaporator through a second pipeline, further comprising a vortex pipe group; The first pipeline is further provided with an ejector, the inlet of the vortex pipe group is communicated with the second pipeline through a third pipeline, the hot end outlet is communicated with the inlet of the compressor through a fourth pipeline, and the cold end outlet is connected with the suction flow inlet of the ejector through a fifth pipeline; The second pipeline and the third pipeline are further respectively provided with a first control valve and a second control valve.

[0006] The ejector replaces the throttling valve, which not only has the same throttling effect, but also can recover the compressor expansion work and improve the energy efficiency of the system. The vortex tube has a series of advantages such as simple structure, convenient operation and long service life. The temperature separation effect of the vortex tube can better improve the performance of the heat pump system (the heat pump system described above has an ejector and three vortex tubes). The cold flow at the cold end outlet of the vortex tube group is further cooled than the outlet of the evaporator under the vortex effect of the vortex tube, and the condensed liquid is supercooled after entering the ejector, so that the liquid entering the evaporator has greater refrigerating capacity, which can reduce the refrigeration temperature when the heat pump is refrigerated. At the same time, the fluid flowing out after passing through the ejector is pressurized, and then enters the vortex tube again, which can improve the temperature separation performance of the vortex tube. Moreover, the first control valve and the second control valve respectively arranged on the second pipeline and the third pipeline can control the temperature. When general refrigeration temperature is needed, the second control valve is closed to limit the communication of the third pipeline, the first control valve is opened to ensure the communication of the second pipeline, and the heat pump system does not pass through the vortex tube group at this time. When lower temperature is needed, the first control valve is closed and the second control valve is opened, and the vortex tube group is added, which improves the refrigeration effect through the temperature separation effect of the vortex tube. According to different refrigeration requirements, the temperature can be controlled as needed.

[0007] Specifically, the first pipeline is further provided with a condenser, the inlet of which is communicated with the outlet of the compressor, and the outlet of which is communicated with the main flow inlet of the ejector. The high-temperature and high-pressure gas discharged by the compressor enters the condenser and absorbs the cold energy from the outside, so as to condense the high-temperature and high-pressure gas into low-temperature and high-pressure liquid.

[0008] The heat pump system with an ejector and three vortex tubes further comprises a cooler. The first pipeline is further provided with a gas-liquid separator, the inlet of which is communicated with the outlet of the ejector, and the two outlets of which are respectively communicated with the inlet of the evaporator and the inlet of the cooler. The outlet of the cooler is combined with the outlet of the evaporator and communicated with the second pipeline. The outlet of the ejector is divided into two routes after passing through the gas-liquid separator, the liquid enters the evaporator, and the gas enters the cooler, realizing "one machine with multiple cold", that is, the evaporator provides low temperature, and the cooler provides lower temperature, which meets the working conditions and environment with various temperature requirements.

[0009] Specifically, the vortex tube group comprises a first vortex tube, the inlet of which is communicated with the third pipeline, the hot end outlet of which is communicated with the fourth pipeline, and the cold end outlet of which is communicated with the fifth pipeline. The hot flow at the hot end outlet of the first vortex tube enters the compressor inlet through the fourth pipeline to provide heat source for the compressor, and the cold flow at the cold end outlet of the first vortex tube enters the ejector to supercool the condensed liquid, so that the liquid entering the evaporator has greater refrigerating capacity, which can reduce the refrigeration temperature when the heat pump is refrigerated.

[0010] The vortex tube group further comprises a second vortex tube, the inlet and the hot end outlet of the second vortex tube are communicated with the fourth pipeline, and the cold end outlet is communicated with the fifth pipeline.

[0011] As a preferred embodiment, a third control valve is further arranged between the inlet of the second vortex tube and the fourth pipeline, when the first control valve and the third control valve are closed and the second control valve is opened, the heat pump system is used for a lower refrigeration temperature, and when a lower temperature is needed, the third control valve is continuously opened, so that the second vortex tube is added into the operation of the whole system.

[0012] Further, an oil separator is further arranged on the first pipeline, the inlet of the oil separator is communicated with the outlet of the compressor, and the outlet of the oil separator is communicated with the inlet of the condenser.

[0013] The heat pump system with the ejector and the three vortex tubes further comprises a third vortex tube, the inlet of the third vortex tube is communicated with the outlet of the compressor through a sixth pipeline, the hot end outlet of the third vortex tube is communicated with the inlet of the condenser through a seventh pipeline, and the cold end outlet of the third vortex tube is communicated with the fifth pipeline.

[0014] Further preferably, a fourth control valve is further arranged on the sixth pipeline, when the heat pump system is used for heating, the fourth control valve is in a closed state when high-temperature heating is needed, and the fourth control valve is opened when higher temperature is needed, so that the temperature control during heating is realized by opening and closing of the fourth control valve.

[0015] Through the above design, the heat pump system with the ejector and the three vortex tubes has the following beneficial effects:

[0016] (1) The ejector is used to replace the throttling valve, so that the throttling effect can be achieved, the expansion work of the compressor can be recovered, and the system energy efficiency can be improved.

[0017] (2) The vortex tube group is arranged, the temperature separation effect of the vortex tube is used to improve the refrigeration effect, a plurality of control valves are arranged, the temperature control during refrigeration is realized, the third vortex tube and the fourth control valve are arranged, the temperature control during heating is realized, and the whole heat pump system has the function of "controlling temperature according to needs".

[0018] (3) The heat pump system can reduce system load, extend the life cycle of the compressor, reduce system working time, and reduce refrigerant charge, ultimately achieving the purpose of reducing initial investment of the system, by virtue of higher heating temperature during heating and lower cooling temperature during cooling.

[0019] (4) The ejector outlet is divided into two paths after passing through the gas-liquid separator, the liquid enters the evaporator, and the gas enters the cooler, realizing "one machine with multiple cooling", i.e., the evaporator provides low temperature, and the cooler provides lower temperature, meeting the working conditions and environment with various temperature requirements. BRIEF DESCRIPTION OF DRAWINGS

[0020] In the drawings:

[0021] Figure 1 It is a schematic diagram of the heat pump system in the embodiment;

[0022] The components represented by the reference numerals in the drawings are:

[0023] 1, compressor; 2, oil separator; 3, check valve; 4, condenser; 5, ejector; 6, gas-liquid separator; 7, evaporator; 8, cooler; 9, vortex tube group; 91, first vortex tube; 92, second vortex tube; 10, first control valve; 11, second control valve; 12, third control valve; 13, fourth control valve; 14, third vortex tube. DETAILED DESCRIPTION

[0024] Exemplary embodiments of the present disclosure will be described in greater detail below with reference to the accompanying drawings.

[0025] Embodiment

[0026] In combination Figure 1 , the embodiment provides a heat pump system with an ejector and three vortex tubes, including a compressor 1 and an evaporator 7, the outlet of the compressor 1 is communicated with the inlet of the evaporator 7 through a first pipeline, the inlet is communicated with the outlet of the evaporator 7 through a second pipeline, and an ejector 5 is further arranged on the first pipeline. The use of the ejector 5 instead of a throttling valve not only has the same throttling effect, but also can recover the expansion work of the compressor 1 and improve the energy efficiency of the system.

[0027] In the embodiment, a condenser 4 is further arranged on the first pipeline, the inlet of the condenser 4 is communicated with the outlet of the compressor 1, and the outlet of the condenser 4 is communicated with the main flow inlet of the ejector 5. After the high-temperature and high-pressure gas discharged by the compressor 1 enters the condenser 4, the heat of the gas is absorbed, so that the high-temperature and high-pressure gas is condensed into medium-temperature and high-pressure liquid.

[0028] Further, the first pipeline is further provided with an oil separator 2, an inlet of the oil separator 2 is communicated with an outlet of the compressor 1, and an outlet of the oil separator 2 is communicated with an inlet of the condenser 4.

[0029] The heat pump system with the ejector and the three vortex tubes further comprises a cooler 8; the first pipeline is further provided with a gas-liquid separator 6, an inlet of the gas-liquid separator 6 is communicated with an outlet of the ejector 5, and two outlets of the gas-liquid separator 6 are respectively communicated with inlets of the evaporator 7 and the cooler 8; an outlet of the cooler 8 is communicated with an outlet of the evaporator 7 and the second pipeline. After the outlet of the ejector 5 passes through the gas-liquid separator 6, the outlet is divided into two paths, liquid enters the evaporator 7, and gas enters the cooler 8, so that 'one machine with multiple cold' is realized, that is, the evaporator 7 provides low temperature, and the cooler 8 provides lower temperature, so that the working conditions and the environment with various temperature requirements are met.

[0030] As the core technical concept of the utility model, the heat pump system further comprises a vortex tube group 9; an inlet of the vortex tube group 9 is communicated with the second pipeline through a third pipeline, a hot end outlet is communicated with an inlet of the compressor 1 through a fourth pipeline, and a cold end outlet is connected with a suction flow inlet of the ejector 5 through a fifth pipeline; the second pipeline and the third pipeline are further respectively provided with a first control valve 10 and a second control valve 11.

[0031] The vortex tube has a series of advantages such as simple structure, convenient operation and long service life, and the temperature separation effect of the vortex tube can better improve the performance of the heat pump system. Cold flow of the cold end outlet of the vortex tube group 9 is further cooled under the vortex effect of the vortex tube than the outlet of the evaporator 7, enters the ejector 5, and supercools the condensed liquid, so that the liquid entering the evaporator 7 has greater refrigerating capacity, the refrigerating temperature can be reduced when the heat pump is refrigerated, meanwhile, the pressure of the fluid flowing out after passing through the ejector 5 is increased, and the temperature separation performance of the vortex tube can be improved after the fluid enters the vortex tube again. Moreover, the first control valve 10 and the second control valve 11 arranged on the second pipeline and the third pipeline respectively can realize temperature control, when general refrigerating temperature is needed, the second control valve 11 is closed, the communication of the third pipeline is limited, the first control valve 10 is opened, and the communication of the second pipeline is ensured, at this time, the heat pump system does not pass through the vortex tube group 9; when lower temperature is needed, the first control valve 10 is closed, the second control valve 11 is opened, the vortex tube group 9 is added, the refrigerating effect is improved through the temperature separation effect of the vortex tube, and the temperature is controlled according to different refrigerating requirements.

[0032] Specifically, the vortex tube group 9 includes a first vortex tube 91, the inlet of which is communicated with the third pipeline, the hot end outlet is communicated with the fourth pipeline, and the cold end outlet is communicated with the fifth pipeline. The hot flow of the hot end outlet of the first vortex tube 91 enters the inlet of the compressor 1 through the fourth pipeline to provide heat source for the compressor 1, and the cold flow of the cold end outlet is supercooled after entering the ejector 5 to make the liquid entering the evaporator 7 have greater refrigerating capacity, so that the refrigeration temperature can be reduced when the heat pump is refrigerated.

[0033] The vortex tube group 9 further includes a second vortex tube 92, the inlet and the hot end outlet of which are communicated with the fourth pipeline, and the cold end outlet is communicated with the fifth pipeline. The hot flow of the hot end outlet of the first vortex tube 91 enters the inlet of the second vortex tube 92, and after further temperature separation of the second vortex tube 92, the hot flow of the hot end outlet of the second vortex tube 92 is combined with the hot flow of the hot end outlet of the first vortex tube 91 to enter the inlet of the compressor 1, and the cold flow of the cold end outlet of the second vortex tube 92 is combined with the cold flow of the cold end outlet of the first vortex tube 91 to enter the suction flow inlet of the ejector 5, so as to further improve the refrigeration effect.

[0034] As a preferred embodiment, the inlet of the second vortex tube 92 is further communicated with the fourth pipeline through the third control valve 12. When the first control valve 10 and the third control valve 12 are closed and the second control valve 11 is opened, the heat pump system is at a lower refrigeration temperature, and when lower temperature is needed, the third control valve 12 is opened to make the second vortex tube 92 join the operation of the whole system.

[0035] The heat pump system with the ejector and the three vortex tubes further includes a third vortex tube 14, the inlet of which is communicated with the outlet of the compressor 1 through the sixth pipeline, the hot end outlet is communicated with the inlet of the condenser 4 through the seventh pipeline, and the cold end outlet is communicated with the fifth pipeline. The hot flow of the hot end outlet of the third vortex tube 14 is further heated than the outlet of the compressor 1, and after condensation in the condenser 4, more heat can be generated, so that the heating temperature can be increased when the heat pump is heated.

[0036] Further preferably, the fourth control valve 13 is further arranged on the sixth pipeline. When high-temperature heating is needed, the fourth control valve 13 is in a closed state, and when higher temperature is needed, the fourth control valve 13 is opened, so as to realize temperature control when heating.

[0037] To prevent the heat pump system from fluid reverse flow during operation, a one-way valve 3 is arranged between the outlet of the cooler 8 and the second pipeline, between the inlet of the condenser 4 and the outlet of the oil separator 2, between the inlet of the condenser 4 and the outlet of the hot end of the third vortex tube 14, between the hot end outlet of the first vortex tube 91 and the hot end outlet of the second vortex tube 92, and on the fourth pipeline.

[0038] The heat pump system of the utility model can realize refrigeration and heating effects simultaneously, is more suitable for complex environmental requirements in industrial production, and is provided with a heating port connected with the condenser 4 and a refrigeration port connected with the evaporator 7 and the cooler 8.

[0039] The specific working principle of the embodiment is as follows:

[0040] When refrigerating, the fourth control valve 13 is kept closed, the first control valve 10 is opened when general refrigeration temperature is needed, the second control valve 11 and the third control valve 12 are closed, the communication of the third pipeline is limited, the heat pump system does not pass through the vortex tube group 9, the ejector 5 functions as a throttle valve at this time, and the effect of throttling and pressure reduction is achieved; when lower temperature is needed, the first control valve 10 and the third control valve 12 are closed, and the second control valve 11 is opened, at this time, the fluid passing through the outlet of the evaporator 7 and the condenser 4 enters the inlet of the first vortex tube 91, the hot flow of the hot end outlet of the first vortex tube 91 enters the inlet of the second vortex tube 92, the hot flow of the hot end outlet of the second vortex tube 92 and the hot flow of the hot end outlet of the first vortex tube 91 are combined and then enter the inlet of the compressor 1, and the cold flow of the cold end outlet of the second vortex tube 92 and the cold flow of the cold end outlet of the first vortex tube 91 are combined and then enter the suction flow inlet of the ejector 5, so that the refrigeration effect is further improved.

[0041] When heating, the first control valve 10 is kept closed, the second control valve 11 and the third control valve 12 are opened, and the temperature of the heating port of the condenser 4 is relatively high at this time; when high-temperature heating is needed, the fourth control valve 13 can be further opened, so that the third vortex tube 14 is added to the heat pump system, the temperature of the fluid entering the condenser 4 is further improved, more heat can be generated after condensation in the condenser 4, and the heating temperature can be improved when the heat pump is heating.

[0042] Through the above design, the heat pump system with the ejector and three vortex tubes adopts the ejector 5 to replace the throttling valve, not only has the same throttling effect, but also can recover the expansion work of the compressor 1, and improves the system energy efficiency.

[0043] By setting the vortex tube group 9, the temperature separation effect of the vortex tube is utilized to improve the refrigeration effect, and multiple control valves are arranged to realize temperature control during refrigeration; by setting the third vortex tube 14 and the fourth control valve 13, temperature control during heating is realized, and the whole heat pump system has the function of "controlling temperature on demand". The heat pump system can reduce system load, prolong the service life of the compressor 1 and reduce system working time by virtue of higher heating temperature during heating and lower refrigeration temperature during refrigeration. The outlet of the ejector 5 is divided into two routes after passing through the gas-liquid separator 6, the liquid enters the evaporator 7, and the gas enters the cooler 8, so that "one machine with multiple refrigeration" is realized, that is, the evaporator 7 provides low temperature, and the cooler 8 provides lower temperature, so as to meet the working conditions and environment with various temperature requirements. In addition, because of the improvement of the heating and refrigeration effects in the heat pump system, smaller pipe diameter, smaller power compressor 1, smaller heat exchange area condenser 4 and evaporator 7 can be used during system design, and the refrigerant charging amount can be reduced, so as to finally achieve the purpose of reducing the initial investment of the system.

Claims

1. A heat pump system with an ejector and three vortex tubes, comprising a compressor (1) and an evaporator (7), wherein the outlet of the compressor (1) is connected to the inlet of the evaporator (7) via a first pipeline, and the inlet is connected to the outlet of the evaporator (7) via a second pipeline, characterized in that: Also included is a vortex tube group (9); An ejector (5) is also provided on the first pipeline, the inlet of the vortex tube group (9) is connected to the second pipeline through a third pipeline, the hot end outlet is connected to the inlet of the compressor (1) through a fourth pipeline, and the cold end outlet is connected to the ejector flow inlet of the ejector (5) through a fifth pipeline; The second pipeline and the third pipeline are further provided with a first control valve (10) and a second control valve (11), respectively.

2. A heat pump system with an ejector and three vortex tubes according to claim 1, characterized in that: The first pipeline is also provided with a condenser (4), the inlet of which is connected to the outlet of the compressor (1), and the outlet of which is connected to the inlet of the ejector (5).

3. A heat pump system with an ejector and three vortex tubes according to claim 1, characterized in that: Also includes a cooler (8); A gas-liquid separator (6) is also provided on the first pipeline, the inlet of the gas-liquid separator (6) is connected to the outlet of the ejector (5), and the two outlets are respectively connected to the inlets of the evaporator (7) and the cooler (8); The outlet of the cooler (8) is communicated with the second pipeline.

4. A heat pump system with an ejector and three vortex tubes according to claim 1, characterized in that: The vortex tube group (9) comprises a first vortex tube (91), the inlet of the first vortex tube (91) is connected to the third pipeline, the hot end outlet is connected to the fourth pipeline, and the cold end outlet is connected to the fifth pipeline.

5. A heat pump system with an ejector and three vortex tubes according to claim 1, characterized in that: The vortex tube group (9) further includes a second vortex tube (92), the inlet and hot end outlet of the second vortex tube (92) are both connected to the fourth pipeline, and the cold end outlet is connected to the fifth pipeline.

6. A heat pump system with an ejector and three vortex tubes according to claim 5, characterized in that: A third control valve (12) is further provided between the inlet of the second vortex tube (92) and the fourth pipeline.

7. A heat pump system with an ejector and three vortex tubes according to claim 2, characterized in that: An oil separator (2) is also provided on the first pipeline, the inlet of which is connected to the outlet of the compressor (1), and the outlet of which is connected to the inlet of the condenser (4).

8. A heat pump system with an ejector and three vortex tubes according to claim 2, characterized in that: It also includes a third vortex tube (14), the inlet of the third vortex tube (14) is connected to the outlet of the compressor (1) through a sixth pipeline, the hot end outlet is connected to the inlet of the condenser (4) through a seventh pipeline, and the cold end outlet is connected to the fifth pipeline.

9. A heat pump system with an ejector and three vortex tubes according to claim 8, characterized in that: The sixth pipeline is also provided with a fourth control valve (13).

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