A virus protection device based on the heating principle of carbon dioxide heat pump

Abstract

The present invention discloses a disinfection and protection device based on the heating principle of a carbon dioxide heat pump, comprising a high-temperature disinfection chamber; a carbon dioxide heat pump heating system, comprising a compressor, an air cooler, an expansion valve and an evaporator, the air cooler is provided with a first pipeline and a second pipeline for mutual heat exchange, the compressor, the first pipeline, the expansion valve and the evaporator are connected in sequence to form a heating circuit; a water circulation heating system, comprising a buffer water tank, a heating coil and a water pump, the heating coil is arranged in the high-temperature disinfection chamber, the buffer water tank, the water pump, the second pipeline and the heating coil are connected in sequence to form a hot water exchange circuit; a heat storage heat exchanger is provided with a third pipeline and a fourth pipeline for mutual heat exchange, the third pipeline is arranged in parallel with the heating circuit, the fourth pipeline is arranged in parallel with the hot water exchange circuit, the first valve assembly is configured to turn on or off the third pipeline connected in parallel with the heating circuit; the second valve assembly is configured to turn on or off the fourth pipeline connected in parallel with the hot water exchange circuit.

Description

Technical Field

[0001] The invention relates to the technical field of high-temperature disinfection equipment, and in particular to a disinfection and protection equipment based on the heating principle of a carbon dioxide heat pump. Background Art

[0002] Traditional high-temperature disinfection chambers usually use electric heating or gas heating to provide heat, thereby sterilizing and inactivating the air and equipment (such as medical instruments, etc.) in the high-temperature disinfection chamber, eliminating the viruses therein, and playing a role in sterilization and protection. However, the thermal efficiency of electric heating or gas heating is generally low, and the energy consumption is huge. In addition, the high-temperature disinfection chamber based on the electric heating structure is prone to line aging or damage, causing circuit danger and endangering personal safety. The high-temperature disinfection chamber based on the gas heating structure is prone to problems such as gas leakage, causing poisoning to the surrounding people and animals, and also polluting the environment. Therefore, the high-temperature disinfection chambers with the above two heating structures have many problems such as low thermal efficiency, huge energy consumption, low safety and reliability, and insufficient environmental protection. Summary of the invention

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a virus protection device based on the carbon dioxide heat pump heating principle, which is safer, more reliable, has lower energy consumption and higher heating efficiency.

[0004] In order to achieve the purpose of the above invention, the present invention adopts the following technical solutions:

[0005] A virus protection device based on the heating principle of a carbon dioxide heat pump, comprising:

[0006] Heated sterilization chamber;

[0007] A carbon dioxide heat pump heating system comprises a compressor, an air cooler, an expansion valve and an evaporator, wherein the air cooler has a first pipeline and a second pipeline for mutual heat exchange, and the compressor, the first pipeline, the expansion valve and the evaporator are sequentially connected to form a heating circuit for refrigerant circulation;

[0008] A water circulation heating system, comprising a buffer water tank, a heating coil and a water pump, wherein the heating coil is arranged inside the heating and disinfection chamber, and the buffer water tank, the water pump, the second pipeline and the heating coil are sequentially connected to form a heat exchange water circuit for water flow circulation;

[0009] A heat storage heat exchanger is located downstream of the air cooler, wherein the heat storage heat exchanger has a third pipeline and a fourth pipeline for mutual heat exchange, wherein the third pipeline is arranged in parallel with the heating circuit, and the fourth pipeline is arranged in parallel with the heat exchange circuit;

[0010] A first valve assembly is configured to open or close a third pipeline connected in parallel to the heating circuit;

[0011] The second valve assembly is configured to open or close a fourth pipeline connected in parallel to the water exchange water circuit.

[0012] In the above technical solution, preferably, it also includes a control system, which includes a control unit, a first temperature measuring element and a second temperature measuring element, the first temperature measuring element is arranged on the outlet side of the first pipeline, and the second temperature measuring element is arranged in the heating and disinfection chamber, the control unit is signal-connected with the first temperature measuring element and the second temperature measuring element respectively, and is control-connected with the first valve assembly and the second control assembly respectively, and the control unit is configured to control the operation of the first valve assembly based on the temperature feedback signal of the first temperature measuring element, and to control the operation of the second valve assembly based on the temperature feedback signal of the second temperature measuring element.

[0013] In the above technical solution, preferably, a first temperature threshold is preset in the control unit. When the measured temperature value of the first temperature measuring element is less than the first temperature threshold, the control unit controls the first valve assembly to close the third pipeline and controls the second valve assembly to close the fourth pipeline; when the measured temperature value of the first temperature measuring element is greater than or equal to the first temperature threshold, the control unit controls the first valve assembly to open the third pipeline.

[0014] In the above technical solution, preferably, a second temperature threshold is preset in the control unit. When the measured temperature value of the second temperature measuring element is greater than or equal to the second temperature threshold, the control unit controls the compressor to stop working and controls the second valve assembly to connect the fourth pipeline.

[0015] In the above technical solution, preferably, the compressor is a variable frequency compressor, and the water pump is a variable frequency water pump.

[0016] In the above technical solution, preferably, the water circulation heating system also includes a steam injection pipe, and the steam injection pipe is arranged in the heating and disinfection chamber and is arranged in parallel with the heating coil.

[0017] In the above technical solution, preferably, the buffer water tank is provided with a water replenishment port, and the water replenishment port is connected to an external water source.

[0018] In the above technical solution, preferably, the first valve assembly includes a first control valve, a second control valve and a third control valve, the second control valve is connected to the inlet side of the third pipeline, the third control valve is connected to the outlet side of the third pipeline, and the first control valve is connected to the heating circuit and is between the second control valve and the third control valve.

[0019] In the above technical solution, preferably, the second valve assembly includes a fourth control valve and a fifth control valve, the fifth control valve is connected to the inlet side of the fourth pipeline, and the fourth control valve is connected to the outlet side of the fourth pipeline.

[0020] The present invention provides a carbon dioxide heat pump heating system, a water circulation heating system, a heat storage heat exchanger, a first valve assembly and a second valve assembly. The carbon dioxide heat pump heating system transfers heat to the heat exchange coil of the water circulation heating system. The heat exchange coil heats the air in the high-temperature disinfection room, so as to achieve a relatively high water outlet temperature and meet the high temperature requirement for disinfection and inactivation. The heat accumulator stores the residual heat energy after heat exchange of the carbon dioxide heat pump heating system, and the first valve assembly and the second valve assembly are used to transfer the residual heat energy to the heat exchange coil of the water circulation heating system. This can improve the energy efficiency ratio of the carbon dioxide heat pump heating system and save the energy consumption of the entire disinfection and protection equipment. Moreover, the disinfection and protection equipment is based on the carbon dioxide heat pump heating principle, is an environmentally friendly energy source, and is relatively environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structural principle of the present invention;

[0022] Among them: 1. High temperature disinfection room;

[0023] 2. Carbon dioxide heat pump heating system; 21. Compressor; 22. Air cooler; 221. First pipeline; 222. Second pipeline; 23. Expansion valve; 24. Evaporator; 25. Heating circuit;

[0024] 3. Water circulation heating system; 31. Buffer water tank; 311. Water replenishment port; 32. Heating coil; 33. Water pump; 34. Heat exchange water circuit; 35. Steam injection pipe;

[0025] 4. heat storage heat exchanger; 41. third pipeline; 42. fourth pipeline;

[0026] 5. First valve assembly; 51. First control valve; 52. Second control valve; 53. Third control valve;

[0027] 6. Second valve assembly; 61. Fourth control valve; 62. Fifth control valve. DETAILED DESCRIPTION

[0028] In order to explain the technical content, structural features, objectives and effects of the invention in detail, the following will be described in detail with reference to the embodiments and the accompanying drawings.

[0029] The anti-virus protection equipment of the present invention is mainly based on the heating principle of carbon dioxide heat pump, which has the advantages of being safer and more reliable, lower energy consumption and higher heating efficiency. Figure 1 The structural composition and working principle of the present invention are specifically described.

[0030] like Figure 1 As shown, the disinfection protection equipment includes a high-temperature disinfection chamber 1, a carbon dioxide heat pump heating system 2, a water circulation heating system 3, a heat storage heat exchanger 4, a first valve assembly 5, a second valve assembly 6 and a control system.

[0031] The high-temperature disinfection chamber 1 is mainly used to disinfect, sterilize and inactivate medical instruments, protective equipment, etc., provide a high-temperature environment for the medical instruments, protective equipment, etc. placed in the room, heat the air therein, and inactivate viruses and bacteria on the indoor air, medical instruments and protective equipment. In this example, the design temperature of the high-temperature disinfection chamber 1 is divided into a high-temperature range and a medium-temperature range. When the high-temperature disinfection chamber 1 is in the design temperature environment of the high-temperature range, its indoor temperature will be stabilized at 50-60°C; when the high-temperature disinfection chamber 1 is in the design temperature environment of the medium-temperature range, its indoor temperature will be stabilized at 25-35°C.

[0032] The carbon dioxide heat pump heating system 2 is mainly used to provide the required heat energy for the high-temperature disinfection chamber 1. It includes a compressor 21, an air cooler 22, an expansion valve 23 and an evaporator 24. The air cooler 22 has a first pipeline 221 and a second pipeline 222 for heat exchange with each other. The compressor 21, the first pipeline 221, the expansion valve 23 and the evaporator 24 are connected in sequence and constitute a heating circuit 25 for refrigerant circulation.

[0033] The water circulation heating system 3 includes a buffer water tank 31, a heating coil 32, a water pump 33 and a steam injection pipe 35. The heating coil 32 and the steam injection pipe 35 are respectively arranged inside the high-temperature disinfection chamber 1. The buffer water tank 31, the water pump 33, the second pipeline 222 and the heating coil 32 are sequentially connected and constitute a water exchange circuit 34 for water flow circulation. The steam injection pipe 35 is arranged in the high-temperature disinfection chamber 1 and is arranged in parallel with the heating coil 32. The buffer water tank 31 is provided with a water supply port 311, and the water supply port 311 is connected to an external water source.

[0034] The heat storage heat exchanger 4 is located downstream of the air cooler 22 . The heat storage heat exchanger 4 has a third pipeline 41 and a fourth pipeline 42 for mutual heat exchange. The third pipeline 41 is arranged in parallel with the heating circuit 25 , and the fourth pipeline 42 is arranged in parallel with the heat exchange water circuit 34 .

[0035] The first valve assembly 5 is configured to open or close the third pipeline 41 connected in parallel to the heating circuit 25. The first valve assembly 5 includes a first control valve 51, a second control valve 52 and a third control valve 53. The second control valve 52 is connected to the inlet side of the third pipeline 41, and the third control valve 53 is connected to the outlet side of the third pipeline 41. The first control valve 51 is connected to the heating circuit 25 and is between the second control valve 52 and the third control valve 53.

[0036] The second valve assembly 6 is configured to open or close the fourth pipeline 42 connected in parallel to the hot water exchange circuit 34. The second valve assembly 6 includes a fourth control valve 61 and a fifth control valve 62. The fifth control valve 62 is connected to the inlet side of the fourth pipeline 42, and the fourth control valve 61 is connected to the outlet side of the fourth pipeline 42.

[0037] The control system includes a control unit, a first temperature measuring element and a second temperature measuring element. The first temperature measuring element is arranged at the outlet side of the first pipeline 221, and the second temperature measuring element is arranged in the high-temperature disinfection chamber 1. The control unit is signal-connected with the first temperature measuring element and the second temperature measuring element respectively, and is control-connected with the first valve assembly 5 and the second valve control assembly respectively. The control unit is configured to control the operation of the first valve assembly 5 based on the temperature feedback signal of the first temperature measuring element, and to control the operation of the second valve assembly 6 based on the temperature feedback signal of the second temperature measuring element.

[0038] A first temperature threshold is preset in the control unit. When the measured temperature value of the first temperature measuring element is less than the first temperature threshold, the control unit controls the first valve assembly 5 to close the third pipeline 41 and controls the second valve assembly 6 to close the fourth pipeline 42; when the measured temperature value of the first temperature measuring element is greater than or equal to the first temperature threshold, the control unit controls the first valve assembly 5 to conduct the third pipeline 41. A second temperature threshold is preset in the control unit. When the measured temperature value of the second temperature measuring element is greater than or equal to the second temperature threshold, the control unit controls the compressor 21 to stop working and controls the second valve assembly 6 to conduct the fourth pipeline 42. In this example, in order to achieve variable frequency control and save energy consumption, the compressor 21 is a variable frequency compressor and the water pump 33 is a variable frequency water pump.

[0039] The working principle of the present invention is: after the anti-virus protection equipment is turned on, the carbon dioxide heat pump heating system 2, the water circulation heating system 3 and the control system will respectively perform the following tasks.

[0040] First, on the side of the carbon dioxide heat pump heating system 2: the compressor 21 sucks carbon dioxide refrigerant from the evaporator 24, and after compression and work, it becomes a high-temperature and high-pressure gaseous refrigerant, and then the high-temperature and high-pressure gaseous refrigerant enters the first pipeline 221 of the air cooler 22. At this time, the inlet temperature of the first pipeline 221 is about 110-120°C. The refrigerant entering the first pipeline 221 exchanges heat with the water flow in the second pipeline 222, and transfers most of the heat to the water flow in the second pipeline 222. For the carbon dioxide heat pump heating system 2, the temperature of the refrigerant returning to the compressor 21 after heat exchange cannot be too high, otherwise it will affect the energy efficiency ratio and normal operation of the heat pump system.

[0041] Secondly, on the control system side: the control system needs to judge the outlet temperature of the first pipeline 221, so as to determine whether the third pipeline 41 of the heat storage heat exchanger 4 is involved in the heating circuit 25 and store heat, so as to store the residual heat energy of the refrigerant after heat exchange on the air cooler 22 side for standby use, saving the energy consumption of the heat pump system. The first temperature measuring element feeds back the measured temperature signal at the outlet of the first pipeline 221 to the control unit. Specifically, when the measured temperature value of the first temperature measuring element is less than the first temperature threshold value of 40°C, the control unit controls the first valve assembly 5 to close the third pipeline 41 of the heat storage device 4 connected in parallel to the heating circuit 25, that is, the control unit controls the first control valve 51 to open, and the second control valve 52 and the third control valve 53 are closed respectively. Thus, the refrigerant passes through the first pipeline 221 of the air cooler 22, the first control valve 51, the expansion valve 23 and the evaporator 24 in turn, and finally returns to the compressor 21, so as to circulate. When the measured temperature value of the first temperature measuring element is ≥ the first temperature threshold value of 40°C, the control unit controls the first valve assembly 5 to open the third pipeline 41 of the heat accumulator 4 connected in parallel to the heating circuit 25, that is, the control unit controls the first control valve 51 to close, and the second control valve 52 and the third control valve 53 to open respectively. At the same time, the control unit controls the second valve assembly 6 to close the fourth pipeline 42 of the heat accumulator 4 connected in parallel to the hot water exchange circuit 34, that is, the control unit controls the fourth control valve 61 and the fifth control valve 62 to close respectively, that is, the fourth pipeline 42 of the heat storage heat exchanger 4 does not temporarily exchange heat with the hot water exchange circuit 34 of the water circulation heating system 3, so that the temperature on the outlet side of the first pipeline 221 of the air cooler 22 can be maintained at 30-40°C, ensuring that the suction temperature of the compressor 21 meets the working requirements of the compressor 21. In this way, the refrigerant passes through the first pipeline 221 of the air cooler 22, the second control valve 52, the third pipeline 41 of the heat storage heat exchanger 4, the expansion valve 23 and the evaporator 24 in sequence, and finally returns to the compressor 21, thus circulating.

[0042] Finally, on the side of the water circulation heating system 3: the water pump 33 pumps the water in the buffer water tank 31 out, and reaches the heating coil 32 after passing through the second pipeline 222 of the air cooler 22, and heats the inside of the high-temperature disinfection chamber 1 at high temperature. When necessary, the water exchange water circuit 34 can switch the water to flow into the steam injection pipe 35, spraying 90-95°C gas-liquid mixed steam for high-temperature disinfection, and at the same time replenishing the water in the buffer water tank 31 in time to prevent water shortage in the water circulation.

[0043] When the high temperature disinfection chamber 1 needs to be heated at a high temperature, the control unit controls the second valve assembly 6 to close the fourth pipeline 42 of the heat storage heat exchanger 4, that is, the control unit controls the fourth control valve 61 and the fifth control valve 62 to be closed respectively. The water at about 90°C coming out of the second pipeline 222 of the air cooler 22 heats the high temperature disinfection chamber 1, so that the temperature in the high temperature disinfection chamber 1 rises, and the temperature is detected by the second temperature measuring element to reach 50-60°C. At this time, the return water temperature of the heat exchange water circuit 34 is maintained at about 60°C.

[0044] When the high-temperature sterilization chamber 1 needs to be heated at a medium temperature, the carbon dioxide heat pump heating system 2 is turned off, that is, the control unit controls the compressor 21 to stop working, and controls the second valve assembly 6 to open the fourth pipeline 42 of the heat storage heat exchanger 4, that is, the control unit controls the fourth control valve 61 and the fifth control valve 62 to open, and utilizes the fourth pipeline 42 of the heat storage air cooler 4 and the water exchange water circuit 34 for heat exchange to heat the high-temperature sterilization chamber 1, and keep the temperature of the high-temperature sterilization chamber 1 at 25-35°C.

[0045] In this example, the equipment is automatically controlled by a control system. The compressor 21 and the water pump 33 are both variable frequency devices that can be adjusted steplessly. The expansion valve 23 can adjust the opening in detail to ensure the set temperature in the high-temperature disinfection chamber 1, as well as the outlet temperature of the first pipeline 221 of the air cooler 22, the suction temperature of the compressor 21, the return water temperature of the hot water exchange circuit 34 and other temperature balances.

[0046] The advantage of the present invention is that the residual heat after the air cooler heat exchange is fully utilized and stored, and the disinfection chamber is heated to medium temperature when needed, which not only saves energy but also can maintain the disinfection chamber at a high temperature for a long time.

[0047] This equipment uses the principle of carbon dioxide heat pump to heat the air and eliminate the viruses in it, playing a role in virus protection. Heating based on the principle of carbon dioxide as a heat pump has the following advantages:

[0048] 1. High efficiency and energy saving. Tests have shown that by heating water at 9°C to 60°C, a carbon dioxide heat pump can save more than 75% energy compared to electric and gas water heaters.

[0049] 2. The carbon dioxide heat pump heating process is a fully enclosed process, which is safer and more reliable than direct heating using electricity or gas.

[0050] 3. By using a carbon dioxide heat pump for heating, the exhaust temperature of the compressor can reach a higher temperature at one time, meeting the requirements for killing viruses.

[0051] 4. Carbon dioxide is a natural working fluid. As a refrigerant, it has the advantages of being clean and environmentally friendly. If it leaks, it will not cause any impact on the human body and the environment.

[0052] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A virus protection device based on the heating principle of a carbon dioxide heat pump, characterized in that: include: Heated sterilization chamber (1); A carbon dioxide heat pump heating system (2) comprises a compressor (21), an air cooler (22), an expansion valve (23) and an evaporator (24); the air cooler (22) has a first pipeline (221) and a second pipeline (222) for mutual heat exchange; the compressor (21), the first pipeline (221), the expansion valve (23) and the evaporator (24) are sequentially connected to form a heating circuit (25) for refrigerant circulation; A water circulation heating system (3), comprising a buffer water tank (31), a heating coil (32) and a water pump (33), wherein the heating coil (32) is arranged inside the heating and disinfection chamber (1), and the buffer water tank (31), the water pump (33), the second pipeline (222) and the heating coil (32) are sequentially connected to form a heat exchange water circuit (34) for circulating water flow; A heat storage heat exchanger (4) is located downstream of the air cooler (22), wherein the heat storage heat exchanger (4) has a third pipeline (41) and a fourth pipeline (42) for exchanging heat with each other, wherein the third pipeline (41) is arranged in parallel with the heating circuit (25), and the fourth pipeline (42) is arranged in parallel with the heat exchange circuit (34); A first valve assembly (5) configured to open or close a third pipeline (41) connected in parallel to the heating circuit (25); A second valve assembly (6) configured to open or close a fourth pipeline (42) connected in parallel to the water exchange circuit (34); A control system, the control system comprising a control unit, a first temperature measuring element and a second temperature measuring element, the first temperature measuring element being arranged at an outlet side of the first pipeline (221), the second temperature measuring element being arranged in the heating disinfection chamber (1), the control unit being connected to the first temperature measuring element and the second temperature measuring element by signals respectively, and being connected to the first valve assembly (5) and the second valve assembly (6) by controls respectively, the control unit being configured to control the operation of the first valve assembly (5) based on a temperature feedback signal of the first temperature measuring element, and to control the operation of the second valve assembly (6) based on a temperature feedback signal of the second temperature measuring element; a first temperature threshold is preset in the control unit, when the actual temperature value measured by the first temperature measuring element is less than the first temperature threshold, the control unit controls the first valve assembly (5) to close the third pipeline (41), and controls the second valve assembly (6) to close the fourth pipeline (42); when the actual temperature value measured by the first temperature measuring element is greater than or equal to the first temperature threshold, the control unit controls the first valve assembly (5) to conduct the third pipeline (41).

2. The anti-virus protection device based on the carbon dioxide heat pump heating principle according to claim 1 is characterized by: A second temperature threshold is preset in the control unit. When the actual temperature value measured by the second temperature measuring element is greater than or equal to the second temperature threshold, the control unit controls the compressor (21) to stop working and controls the second valve assembly (6) to conduct the fourth pipeline (42).

3. The anti-virus protection device based on the carbon dioxide heat pump heating principle according to claim 1 is characterized in that: The compressor (21) is a variable frequency compressor, and the water pump (33) is a variable frequency water pump.

4. The anti-virus protection device based on the carbon dioxide heat pump heating principle according to claim 1 is characterized in that: The water circulation heating system (3) further comprises a steam injection pipe (35), wherein the steam injection pipe (35) is arranged in the heating and disinfection chamber (1) and is arranged in parallel with the heating coil (32).

5. The anti-virus protection device based on the carbon dioxide heat pump heating principle according to claim 1 is characterized in that: The buffer water tank (31) is provided with a water replenishment port (311), and the water replenishment port (311) is connected to an external water source.

6. The anti-virus protection device based on the carbon dioxide heat pump heating principle according to claim 1 is characterized by: The first valve assembly (5) comprises a first control valve (51), a second control valve (52) and a third control valve (53); the second control valve (52) is connected to the inlet side of the third pipeline (41); the third control valve (53) is connected to the outlet side of the third pipeline (41); and the first control valve (51) is connected to the heating circuit (25) and is located between the second control valve (52) and the third control valve (53).

7. The anti-virus protection device based on the carbon dioxide heat pump heating principle according to claim 1 is characterized by: The second valve assembly (6) comprises a fourth control valve (61) and a fifth control valve (62), wherein the fifth control valve (62) is connected to an inlet side of the fourth pipeline (42), and the fourth control valve (61) is connected to an outlet side of the fourth pipeline (42).

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