Heat pump system capable of achieving double-temperature-zone cooling and heating

Abstract

A heat pump system capable of achieving double-temperature-zone cooling and heating comprises a compressor, a condenser and an evaporator which are connected in a circulating mode through a pipeline. The condenser further comprises a first vortex tube, the condenser comprises a first condenser and a second condenser which are arranged in parallel, and an inlet, a hot end outlet and a cold end outlet of the first vortex tube are communicated with an outlet of the compressor, an inlet of the second condenser and an inlet of the evaporator respectively; the number of the evaporators is two, the evaporators are arranged in parallel, and the inlet side of one evaporator is further connected with a throttling valve. Exhaust gas of the compressor is directly connected with the vortex tube, the temperature of a high-temperature and high-pressure refrigerant is further increased by means of the unique temperature separation effect of the vortex tube, the heating temperature of the system is increased after the refrigerant enters one condenser, and double-temperature-area heat supply is achieved. Meanwhile, the two evaporators are arranged, the refrigerating effect of different temperatures is obtained by judging whether the liquid refrigerant at the outlet of the gas-liquid separator is subjected to throttling treatment or not, and double-temperature-area cooling is achieved.

Description

Technical Field

[0001] This utility model relates to the field of heat pump technology, specifically a heat pump system that can achieve dual-temperature zone cooling and heating. Background Technology

[0002] With economic development and the improvement of residents' quality of life, heat pump systems are playing an increasingly important role in production and daily life. (See attached diagram in the instruction manual.) Figure 1 Currently, commonly used compressor heat pump systems consist of a compressor 1, a condenser 4, and an evaporator 8 connected in a loop. The condenser 4 and evaporator 8 are only throttled and depressurized via a throttling valve 7, which easily leads to mechanical energy loss of the high-pressure working fluid after throttling, affecting system performance. Furthermore, they suffer from high compression ratios, low efficiency, and difficulty in raising temperatures during heating. In addition, commonly used compressor heat pump systems cannot simultaneously meet multiple temperature requirements, serving only a single temperature zone, limiting their application. Utility Model Content

[0003] To address the technical problems of high compression ratio, low efficiency, difficulty in raising temperature during heating, and inability to simultaneously meet multiple temperature requirements in the aforementioned background technology, this utility model provides a heat pump system that can achieve dual-temperature zone cooling and heating.

[0004] The technical solution of this utility model is as follows:

[0005] A heat pump system capable of providing cooling and heating in two temperature zones includes a compressor, a condenser, and an evaporator connected by a pipeline.

[0006] It also includes a first vortex tube. The condenser includes a first condenser and a second condenser arranged in parallel. The inlet, hot end outlet, and cold end outlet of the first vortex tube are respectively connected to the outlet of the compressor, the inlet of the second condenser, and the inlet of the evaporator.

[0007] The evaporator includes two connected in parallel, and one of the evaporators is also connected to a throttling valve at its inlet.

[0008] The compressor exhaust is directly connected to the vortex tube, and the unique temperature separation effect of the vortex tube is used to further increase the temperature of the high-temperature and high-pressure refrigerant. After entering one of the condensers, the system heating temperature is increased, realizing dual-temperature zone heating. At the same time, two evaporators are set up. By whether the liquid refrigerant at the outlet of the gas-liquid separator is throttled, different cooling effects can be obtained to achieve dual-temperature zone cooling.

[0009] Furthermore, an ejector is provided between the condenser and the evaporator; the working flow inlet of the ejector is connected to the outlet of the condenser, the ejector flow inlet is connected to the cold end outlet of the first vortex tube, and the outlet is connected to the inlet of the evaporator. Using an ejector instead of a throttle valve not only achieves the same throttling effect but also recovers the compressor's expansion work, improving system energy efficiency.

[0010] Preferably, a gas-liquid separator is further provided between the ejector and the evaporator, with its inlet connected to the ejector outlet, its gas outlet connected to the compressor inlet, and its liquid outlet connected to the evaporator inlet. By setting up the gas-liquid separator, the gas generated at the ejector outlet is directly bypassed back to the compressor inlet, significantly improving the performance of the heat pump system.

[0011] In a preferred embodiment, a second vortex tube is further provided between the evaporator and the compressor. Its inlet is connected to the evaporator outlet, its hot-end outlet is connected to the compressor inlet, and its cold-end outlet is connected to the evaporator inlet. Through the temperature separation effect of the vortex tube, the compressor suction temperature is increased, enhancing compressor performance and thus improving the overall cooling and heating effect of the system.

[0012] More preferably, a solenoid valve is also provided between the gas-liquid separator and the evaporator. When the compressor starts, the system pipeline is connected; when the compressor stops, the liquid pipeline is automatically cut off to prevent the refrigerant liquid from continuing to flow to the evaporator, thus preventing liquid slugging and overflow accidents when the compressor restarts after the evaporator is full of liquid.

[0013] An oil separator is also connected to the outlet side of the compressor. The compressor outlet discharges high-temperature, high-pressure gas, which is actually a mixture of refrigerant and refrigeration oil. The refrigeration oil returns directly to the compressor through the capillary tube at the bottom of the oil separator, reducing the amount of refrigeration oil circulating in the piping system.

[0014] Preferably, the outlet side of the oil separator is also connected to a one-way valve. The one-way valve allows the refrigerant to flow in only one direction and is installed in the pipeline to prevent refrigerant gas or liquid from flowing back. Installing a one-way valve near the compressor outlet can prevent refrigerant from flowing back into the compressor from the condenser when the compressor stops, thus preventing liquid slugging.

[0015] Furthermore, a one-way valve is provided between the injector and the gas-liquid separator. The one-way valve allows the refrigerant to flow in only one direction and is installed in the pipeline to prevent refrigerant gas or liquid from flowing back.

[0016] Through the above design, the beneficial effects of this utility model in realizing a heat pump system with dual-temperature zone cooling and heating are as follows:

[0017] (1) It can achieve dual-temperature zone cooling and heating effects. The compressor exhaust is directly connected to the first vortex tube. By utilizing the unique temperature separation effect of the vortex tube, the temperature of the high-temperature and high-pressure refrigerant is further increased. After entering one of the condensers, the system heating temperature is increased, thus achieving dual-temperature zone heating. At the same time, two evaporators are set up. By whether the liquid refrigerant at the outlet of the gas-liquid separator is throttled, different cooling effects can be obtained, thus achieving dual-temperature zone cooling.

[0018] (2) Replacing the throttle valve with an injector not only has the same throttling effect, but also recovers the expansion work of the compressor and improves the system energy efficiency.

[0019] (3) By using the temperature separation effect of the second vortex tube, the compressor suction temperature is increased, the compressor performance is enhanced, and the cooling and heating effect of the entire system is improved. Attached Figure Description

[0020] In the attached diagram:

[0021] Figure 1 This is a schematic diagram of a heat pump system in the prior art;

[0022] Figure 2 This is a schematic diagram of a heat pump system that can achieve dual-temperature zone cooling and heating according to the present invention;

[0023] The components represented by the various reference numerals in the diagram are:

[0024] 1. Compressor; 2. Oil separator; 3. First vortex tube; 4. Condenser; 41. First condenser; 42. Second condenser; 5. Ejector; 6. Gas-liquid separator; 7. Throttling valve; 8. Evaporator; 81. First evaporator; 82. Second evaporator; 9. Solenoid valve; 10. Second vortex tube; 11. Check valve. Detailed Implementation

[0025] Exemplary embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings.

[0026] Example

[0027] Combination Figure 2 This embodiment provides a heat pump system that can provide cooling and heating in two temperature zones, including a compressor 1, a condenser 4 and an evaporator 8 connected by a pipeline.

[0028] The outlet of the compressor 1 is connected to the inlet of the condenser 4 through a first pipe, the inlet of the compressor 4 is connected to the outlet of the evaporator 8 through a second pipe, and the outlet of the condenser 4 is connected to the inlet of the evaporator 8 through a third pipe.

[0029] An oil separator 2 is also connected to the outlet side of the compressor 1. The outlet of the compressor 1 discharges high-temperature, high-pressure gas, which is actually a mixture of refrigerant and refrigeration oil. The refrigeration oil returns directly to the compressor 1 through the capillary tube at the bottom of the oil separator 2, reducing the amount of refrigeration oil circulating in the pipeline system.

[0030] Preferably, the outlet side of the oil separator 2 is also connected to a one-way valve 11. The one-way valve 11 only allows the refrigerant to flow in one direction. It is installed in the pipeline to prevent refrigerant gas or liquid from flowing back. The one-way valve 11 is installed near the outlet of the compressor 1 to prevent the refrigerant from flowing back into the compressor 1 from the condenser 4 when the compressor 1 stops, which would cause liquid slugging.

[0031] In this embodiment, the heat pump system (the aforementioned heat pump system capable of dual-temperature zone cooling and heating) further includes a first vortex tube 3. The condenser 4 includes a first condenser 41 and a second condenser 42 connected in parallel. The inlet, hot-end outlet, and cold-end outlet of the first vortex tube 3 are respectively connected to the outlet of the compressor 1, the inlet of the second condenser 42, and the inlet of the evaporator 8. By directly connecting the exhaust gas of the compressor 1 to the vortex tube, the unique temperature separation effect of the vortex tube is utilized to further increase the temperature of the high-temperature, high-pressure refrigerant. After entering one of the condensers 4, the system heating temperature is increased, achieving dual-temperature zone heating.

[0032] The inlets of the first condenser 41 and the second condenser 42 are connected to the first pipeline through the fourth pipeline and the fifth pipeline, respectively. The first vortex tube 3 is located on the fifth pipeline. The outlets of the first condenser 41 and the second condenser 42 are both connected to the third pipeline through pipelines.

[0033] Furthermore, an ejector 5 is also provided on the third pipe between the condenser 4 and the evaporator 8; the working flow inlet of the ejector 5 is connected to the outlet of the condenser 4, the ejector flow inlet is connected to the cold end outlet of the first vortex tube 3 through a sixth pipe, and the outlet is connected to the inlet of the evaporator 8. Replacing the throttle valve 7 with the ejector 5 not only provides the same throttling effect but also recovers the expansion work of the compressor 1, improving system energy efficiency.

[0034] Preferably, a gas-liquid separator 6 is further provided between the ejector 5 and the evaporator 8. Its inlet is connected to the outlet of the ejector 5, its gas outlet is connected to the inlet of the compressor 1, and its liquid outlet is connected to the inlet of the evaporator 8 via a seventh pipeline. By providing the gas-liquid separator 6, the gas generated at the outlet of the ejector 5 is directly bypassed back to the inlet of the compressor 1, significantly improving the performance of the heat pump system.

[0035] More preferably, a solenoid valve 9 is also provided between the gas-liquid separator 6 and the evaporator 8. When the compressor 1 is started, the system pipeline is connected; when the compressor 1 is stopped, the liquid pipeline is automatically cut off to prevent the refrigerant liquid from continuing to flow to the evaporator 8, so as to prevent liquid slugging and overflow accidents when the compressor 1 is restarted after the evaporator 8 is full of liquid.

[0036] Furthermore, a one-way valve 11 is provided between the injector 5 and the gas-liquid separator 6. The one-way valve 11 allows the refrigerant to flow in only one direction and is installed in the pipeline to prevent refrigerant gas or liquid from flowing back.

[0037] In this embodiment, the evaporator 8 includes two evaporators arranged in parallel, and one of the evaporators 8 is also connected to a throttling valve 7 at its inlet side. By setting up two evaporators 8, different cooling effects can be obtained by whether or not the liquid refrigerant at the outlet of the gas-liquid separator 6 is throttled, thus achieving dual-temperature zone cooling.

[0038] In specific implementation, the two evaporators 8 are a first evaporator 81 and a second evaporator 82, respectively. Their inlets are connected to a third pipeline through an eighth pipeline and a ninth pipeline, respectively, and the throttling valve 7 is located on the ninth pipeline. The outlets of both evaporators 8 are connected to a second pipeline through pipelines.

[0039] In a preferred embodiment, a second vortex tube 10 is further provided on the second pipeline between the evaporator 8 and the compressor 1. Its inlet is connected to the outlet of the evaporator 8 via the second pipeline, its hot-end outlet is connected to the inlet of the compressor 1 via the second pipeline, and its cold-end outlet is connected to the inlet of the evaporator 8. Specifically, the cold-end outlet is connected to the sixth pipeline via the tenth pipeline, and after merging with the gas in the sixth pipeline, it enters the ejector flow inlet of the ejector 5. Through the temperature separation effect of the vortex tube, the suction temperature of the compressor 1 is increased, enhancing the performance of the compressor 1, thereby improving the cooling and heating effect of the entire system.

[0040] Working principle: The gas discharged from compressor 1 is split into two paths after passing through oil separator 2. One path is directly connected to the inlet of the first condenser 41, and the other path is connected to the inlet of the first vortex tube 3. The hot end outlet of the first vortex tube 3 is connected to the inlet of the second condenser 42. The gas temperature at the hot end outlet is further increased than the outlet temperature of compressor 1. After entering the condenser 4, it condenses and generates more heat, realizing dual-temperature zone heating for the first condenser 41 and the second condenser 42. The gas from the cold end outlet of the first vortex tube 3 enters the ejector inlet of ejector 5. The liquid flowing out of the condensate outlets of the first condenser 41 and the second condenser 42 enters the working flow inlet of ejector 5. The two fluids mix and are ejected through the outlet of ejector 5, entering the gas-liquid separator. 6. The separated gas re-enters the compressor 1. The separated liquid is divided into two paths after passing through the solenoid valve 9. One path directly enters the first evaporator 81, and the other path is throttled by the throttling valve 7 before entering the second evaporator 82. By throttling the liquid refrigerant at the outlet of the gas-liquid separator 6, different cooling effects can be obtained, realizing dual-temperature zone cooling. The gas evaporated by the first evaporator 81 and the second evaporator 82 enters the second vortex tube 10. The gas at the hot end outlet of the second vortex tube 10 enters the compressor 1, further increasing the suction temperature of the compressor 1 and enhancing the performance of the compressor 1. The gas at the cold end outlet of the second vortex tube 10 merges with the gas at the cold end outlet of the first vortex tube 3 and enters the ejector flow inlet of the ejector 5 together.

[0041] This invention relates to a heat pump system capable of providing both cooling and heating in two temperature zones. The compressor 1's exhaust gas is directly connected to the first vortex tube 3. Utilizing the unique temperature separation effect of the vortex tube, the high-temperature, high-pressure refrigerant temperature is further increased. After entering one of the condensers 4, the system's heating temperature is raised, achieving dual-temperature zone heating. Simultaneously, two evaporators 8 are installed. By adjusting the flow rate of the liquid refrigerant at the outlet of the gas-liquid separator 6, different cooling temperatures are achieved, thus enabling dual-temperature zone cooling. An ejector 5 replaces the throttling valve 7, which not only provides the same throttling effect but also recovers the expansion work of the compressor 1, improving system energy efficiency. Through the temperature separation effect of the second vortex tube 10, the compressor 1's suction temperature is increased, enhancing its performance and thereby improving the overall cooling and heating effect of the system.

Claims

1. A heat pump system capable of providing cooling and heating in dual temperature zones, comprising a compressor (1), a condenser (4), and an evaporator (8) connected by a pipeline, characterized in that: It also includes a first vortex tube (3), and the condenser (4) includes a first condenser (41) and a second condenser (42) arranged in parallel. The inlet, hot end outlet and cold end outlet of the first vortex tube (3) are respectively connected to the outlet of the compressor (1), the inlet of the second condenser (42) and the inlet of the evaporator (8). The evaporator (8) includes two connected in parallel, and one of the evaporators (8) is also connected to a throttle valve (7) at its inlet side.

2. A heat pump system capable of providing both cooling and heating in dual temperature zones according to claim 1, characterized in that, An ejector (5) is also provided between the condenser (4) and the evaporator (8); The working flow inlet of the ejector (5) is connected to the outlet of the condenser (4), the jet inlet is connected to the cold end outlet of the first vortex tube (3), and the outlet is connected to the inlet of the evaporator (8).

3. A heat pump system capable of providing both cooling and heating in dual temperature zones according to claim 2, characterized in that, A gas-liquid separator (6) is also provided between the injector (5) and the evaporator (8). Its inlet is connected to the outlet of the injector (5), its gas outlet is connected to the inlet of the compressor (1), and its liquid outlet is connected to the inlet of the evaporator (8).

4. A heat pump system capable of providing both cooling and heating in dual temperature zones according to claim 1, characterized in that, A second vortex tube (10) is also provided between the evaporator (8) and the compressor (1), with its inlet connected to the outlet of the evaporator (8), its hot end outlet connected to the inlet of the compressor (1), and its cold end outlet connected to the inlet of the evaporator (8).

5. A heat pump system capable of providing both cooling and heating in dual temperature zones according to claim 3, characterized in that, A solenoid valve (9) is also provided between the gas-liquid separator (6) and the evaporator (8).

6. A heat pump system capable of providing both cooling and heating in dual temperature zones according to claim 1, characterized in that, An oil separator (2) is also connected to the outlet side of the compressor (1).

7. A heat pump system capable of providing both cooling and heating in dual temperature zones according to claim 6, characterized in that, The oil separator (2) is also connected to a check valve (11) on its outlet side.

8. A heat pump system capable of providing both cooling and heating in dual temperature zones according to claim 3, characterized in that, A one-way valve (11) is also provided between the injector (5) and the gas-liquid separator (6).

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