High temperature steam heat pump system

Abstract

The utility model discloses high temperature steam heat pump system belongs to air source heat pump technical field, includes: first water tank, heat pump system and heat exchanger, and the refrigerant passage of heat pump system and heat exchanger is communicated through refrigerant pipeline, and the inlet of heat exchanger water passage is communicated with the lower portion of first water tank through pipeline, and the outlet of heat exchanger water passage is communicated with the upper portion of first water tank through reflux tube, and the reflux tube is higher than the allowable maximum liquid level of first water tank, and the steam generated enters the upper portion of first water tank, and the water in first water tank is not heated. Based on the utility model not setting circulating water pump, so the water in heat exchanger is heated by heat pump system all the time, and expands into steam after being heated to about 120 DEG C, when the pressure in water tank exceeds opening pressure, discharges through steam discharge port. Therefore the utility model generates steam's response speed is faster.

Description

Technical Field

[0001] This utility model belongs to the field of air source heat pump technology, specifically relating to a high-temperature steam heat pump system. Background Technology

[0002] Air source heat pumps use a small amount of electricity as power and refrigerant as a carrier. Based on the physical principle of liquefaction releasing heat and vaporization absorbing heat, they absorb low-grade heat energy from the air and convert it into usable high-grade heat energy, which is then released into the medium that needs to be heated to achieve heating.

[0003] The steam outlet is set with a certain opening pressure. The water is heated to about 120°C. When the pressure in the water tank exceeds the opening pressure, steam can be discharged.

[0004] Existing steam heat pump systems all require a circulating water pump. Under the action of the water pump, the water temperature in the entire water tank needs to be heated to the boiling point of water before steam can be generated. This can lead to the inability to generate steam quickly to some extent. The addition of the water pump increases the energy consumption of the entire machine. The operation of the water pump can cause the pipeline to resonate.

[0005] The liquid level measuring device in the existing steam heat pump system is installed in the first water tank being heated, and the liquid level measuring device is easily damaged in high temperature environments. Utility Model Content

[0006] To achieve rapid steam generation, the inventors designed the technical solution of the high-temperature steam heat pump system of this utility model, including: a first water tank, a heat pump system, and a heat exchanger. The heat exchanger includes a refrigerant channel and a water channel. The heat pump system and the refrigerant channel of the heat exchanger are connected through a refrigerant pipe. The inlet of the water channel of the heat exchanger is connected to the lower part of the first water tank through a pipe. The outlet of the water channel of the heat exchanger is connected to the upper part of the first water tank through a return pipe. The return pipe is higher than the maximum allowable liquid level of the first water tank.

[0007] Furthermore, a liquid level measuring device is installed inside the first water tank.

[0008] Furthermore, a water supply pipe is provided on the upper part of the first water tank, and a water supply valve is provided on the water supply pipe.

[0009] Furthermore, a second water tank is also provided, and the lower parts of the first and second water tanks are connected by a pipe.

[0010] Furthermore, a liquid level measuring device is installed inside the second water tank.

[0011] Furthermore, a water supply pipe is provided on the upper part of the second water tank, and a water supply valve is provided on the water supply pipe.

[0012] Furthermore, a steam vent is also provided.

[0013] Furthermore, the steam discharge port is located at the upper end of the first water tank and / or the outlet end of the heat exchanger water passage.

[0014] Furthermore, the heat pump system includes a compressor, a throttling device, and an evaporator. The outlet of the compressor is connected to the inlet of the refrigerant passage of the heat exchanger via a refrigerant pipe. A throttling device and an evaporator are sequentially arranged between the outlet of the refrigerant passage of the heat exchanger and the inlet of the compressor.

[0015] Furthermore, it also includes a controller, with the heat pump system, liquid level measuring device, and water supply valve electrically connected to the controller.

[0016] Furthermore, a pressure gauge is installed on the steam discharge port, and a safety valve is also installed above the first water tank.

[0017] Furthermore, the pipe connecting the first water tank and the second water tank has an upward bend.

[0018] The working principle of a heat pump system: The compressor compresses the refrigerant into a high-temperature, high-pressure gaseous state. The refrigerant condenses into a liquid state in the heat exchanger, releasing heat during liquefaction, which heats the water in the water passages of the heat exchanger. The refrigerant is then throttled and depressurized by a throttling device, evaporating into a gaseous state in the evaporator. This vaporization absorbs heat from the environment, and the refrigerant becomes a low-temperature, low-pressure gaseous state before re-entering the compressor, thus completing the cycle.

[0019] The return pipe is higher than the maximum permissible liquid level of the first water tank, so the generated steam enters the upper part of the first water tank instead of heating the water in the first water tank. Since this invention does not include a circulating water pump, the water in the heat exchanger is continuously heated by the heat pump system until it reaches approximately 120°C and expands into steam. When the pressure inside the water tank exceeds the opening pressure, the steam is discharged through the steam outlet. Therefore, this invention generates steam at a faster response time.

[0020] Because the water in the heat exchanger is converted into steam, the water in the first water tank will automatically replenish the heat exchanger under the action of gravity; at the same time, because some of the water has turned into steam, there is a certain air pressure above the liquid surface in the first water tank, so the water in the first water tank will also be forced into the heat exchanger.

[0021] The first and second water tanks are connected by a pipe, so the liquid levels are the same.

[0022] Because the water in the second water tank is used to replenish the water in the first water tank, and very little water flows from the first tank into the second, the water temperature in the second tank is lower than that in the first tank. Meanwhile, because there is pressurized steam above the liquid surface in the first tank, its temperature is higher. Therefore, the operating temperature of the liquid level measuring device is lower than when it is installed in the first tank. This invention places the liquid level measuring device in the second tank, thus making its operation more stable and less prone to damage. Attached Figure Description

[0023] Figure 1 This is a system diagram of Embodiment 1 of the present utility model;

[0024] Figure 2 This is a system diagram of Embodiment 2 of the present invention;

[0025] Figure 3 This is a system diagram of Embodiment 3 of the present utility model;

[0026] Figure 4 This is a system diagram of Embodiment 4 of the present utility model.

[0027] In the diagram: 1. First water tank; 2. Second water tank; 3. Heat exchanger; 4. Compressor; 5. Liquid level measuring device; 6. Throttling device; 7. Evaporator; 8. Water supply pipe; 9. Water supply valve; 10. Return pipe; 11. Steam discharge port; 12. Permissible maximum liquid level; 13. Safety valve; 14. Upper bend section. Detailed Implementation

[0028] illustrate:

[0029] 1. The arrows in the attached diagram indicate the direction of medium flow.

[0030] 2. Throttling device 6 may be an electronic expansion valve, capillary tube or thermostatic expansion valve, etc.

[0031] 3. The liquid level measuring device 5 can be a float level gauge, a pressure level gauge, or a capacitance level gauge.

[0032] 4. The first water tank 1 is a pressurized water tank, and the second water tank 2 can be an ordinary water tank or a pressurized water tank.

[0033] 5. Water supply pipe 8 and water supply valve 9 enable system water supply.

[0034] 6. Calculate and set the liquid level positions for opening and closing the liquid level measuring device according to system requirements, and determine the position of the allowable highest liquid level 12.

[0035] 7. The steam start pressure can be set as needed.

[0036] Example 1

[0037] like Figure 1As shown, a high-temperature steam heat pump system includes: a first water tank 1, a heat pump system, and a heat exchanger 3. The heat exchanger 3 includes a refrigerant channel and a water channel. The heat pump system is connected to the refrigerant channel of the heat exchanger 3 through a refrigerant pipe. The inlet of the water channel of the heat exchanger 3 is connected to the lower part of the first water tank 1 through a pipe. The outlet of the water channel of the heat exchanger 3 is connected to the upper part of the first water tank 1 through a return pipe 10. The return pipe 10 is higher than the maximum allowable liquid level 12 of the first water tank 1. A water supply pipe 8 is provided on the upper part of the first water tank 1, and a water supply valve 9 is provided on the water supply pipe 8.

[0038] The heat pump system includes a compressor 4, a throttling device 6, and an evaporator 7. The outlet of the compressor 4 is connected to the inlet of the refrigerant passage of the heat exchanger 3 through a refrigerant pipe. The throttling device 6 and the evaporator 7 are arranged sequentially between the outlet of the refrigerant passage of the heat exchanger 3 and the inlet of the compressor 4.

[0039] It is also provided with a steam vent 11, which is located at the upper end of the first water tank 1.

[0040] Example 2

[0041] like Figure 2 As shown, based on Embodiment 1, the first water tank 1 is equipped with a liquid level measuring device 5.

[0042] Example 3

[0043] like Figure 3 As shown, a high-temperature steam heat pump system includes: a first water tank 1, a heat pump system, and a heat exchanger 3. The heat exchanger 3 includes a refrigerant channel and a water channel. The heat pump system is connected to the refrigerant channel of the heat exchanger 3 through a refrigerant pipe. The inlet of the water channel of the heat exchanger 3 is connected to the lower part of the first water tank 1 through a pipe. The outlet of the water channel of the heat exchanger 3 is connected to the upper part of the first water tank 1 through a return pipe 10. The return pipe 10 is higher than the allowable maximum liquid level 12 of the first water tank 1.

[0044] A second water tank 2 is also provided. The lower parts of the first water tank 1 and the second water tank 2 are connected by a pipe. The pipe connecting the first water tank 1 and the second water tank 2 has an upper bend section 14. The upper bend section 14 avoids the thermal stress generated by the straight pipe under the hot water, and also reduces the amount of hot water flowing from the first water tank 1 to the second water tank 2 to a certain extent.

[0045] The second water tank 2 is equipped with a liquid level measuring device 5.

[0046] The second water tank 2 is provided with a water supply pipe 8 on its upper part, and a water supply valve 9 is provided on the water supply pipe 8.

[0047] A steam vent 11 is also provided. The steam vent 11 is located at the upper end of the first water tank 1. A pressure gauge is installed on the steam vent 11, and a safety valve 13 is also provided above the first water tank 1.

[0048] The heat pump system includes a compressor 4, a throttling device 6, and an evaporator 7. The outlet of the compressor 4 is connected to the inlet of the refrigerant passage of the heat exchanger 3 through a refrigerant pipe. The throttling device 6 and the evaporator 7 are arranged sequentially between the outlet of the refrigerant passage of the heat exchanger 3 and the inlet of the compressor 4.

[0049] It also includes a controller, and the heat pump system, liquid level measuring device 5, and water supply valve 9 are electrically connected to the controller.

[0050] Example 4

[0051] like Figure 4 As shown, the difference from Embodiment 3 is that the steam discharge port 11 is located at the outlet end of the water channel of the heat exchanger 3.

Claims

1. High-temperature steam heat pump system, including: The system comprises a first water tank (1), a heat pump system, and a heat exchanger (3), wherein the heat exchanger (3) includes a refrigerant channel and a water channel, and the heat pump system is connected to the refrigerant channel of the heat exchanger (3) via a refrigerant pipe. The system is characterized by: The inlet of the water passage of the heat exchanger (3) is connected to the lower part of the first water tank (1) through a pipe, and the outlet of the water passage of the heat exchanger (3) is connected to the upper part of the first water tank (1) through a return pipe (10). The return pipe (10) is higher than the maximum allowable liquid level (12) of the first water tank (1).

2. The high-temperature steam heat pump system according to claim 1, characterized in that: The first water tank (1) is equipped with a liquid level measuring device (5).

3. The high-temperature steam heat pump system according to claim 2, characterized in that: The first water tank (1) is provided with a water supply pipe (8) at the top, and a water supply valve (9) is provided on the water supply pipe (8).

4. The high-temperature steam heat pump system according to claim 1, characterized in that: A second water tank (2) is also provided, and the lower parts of the first water tank (1) and the second water tank (2) are connected by a pipe.

5. The high-temperature steam heat pump system according to claim 4, characterized in that: The second water tank (2) is equipped with a liquid level measuring device (5).

6. The high-temperature steam heat pump system according to claim 5, characterized in that: The second water tank (2) is provided with a water supply pipe (8) on the upper part, and a water supply valve (9) is provided on the water supply pipe (8).

7. The high-temperature steam heat pump system according to any one of claims 1 to 6, characterized in that: It is also equipped with a steam vent (11).

8. The high-temperature steam heat pump system according to claim 7, characterized in that: The steam discharge port (11) is located at the upper end of the first water tank (1) and / or at the outlet end of the water passage of the heat exchanger (3).

9. The high-temperature steam heat pump system according to claim 7, characterized in that: The heat pump system includes a compressor (4), a throttling device (6) and an evaporator (7). The outlet of the compressor (4) is connected to the inlet of the refrigerant passage of the heat exchanger (3) through a refrigerant pipe. The throttling device (6) and the evaporator (7) are arranged sequentially between the outlet of the refrigerant passage of the heat exchanger (3) and the inlet of the compressor (4).

10. The high-temperature steam heat pump system according to claim 9, characterized in that: It also includes a controller, and the heat pump system, liquid level measuring device (5), and water supply valve (9) are electrically connected to the controller.

11. The high-temperature steam heat pump system according to claim 7, characterized in that: A pressure gauge is installed on the steam discharge port (11), and a safety valve (13) is also installed above the first water tank (1).

12. The high-temperature steam heat pump system according to claim 4, characterized in that: The pipe connecting the first water tank (1) and the second water tank (2) is provided with an upper bend (14).

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