Reheat split system

Abstract

The invention discloses a reheat shunt system, which relates to the field of air conditioning and ventilation, and comprises a piping system. The piping system is provided with a compressor for compressing air, a dehumidification component for removing indoor moisture, a reheat component for heating the indoor temperature, a recovery component for recovering excess refrigerant in the piping system, and a temperature detection component for detecting indoor and outdoor temperatures. The compressor comprises a compressor high-pressure end and a compressor low-pressure end, the dehumidification component is respectively connected to the compressor high-pressure end and the compressor low-pressure end, the reheat component is respectively connected to the compressor high-pressure end and the compressor low-pressure end, the recovery component is connected to the compressor low-pressure end, and also comprises a control component for controlling the reheat shunt system. The temperature of the dehumidification and reheating in the invention can be controlled to prevent drastic fluctuations in indoor temperature, and can adjust the refrigerant in an outdoor condenser and an indoor reheat coil.

Description

Technical Field

[0001] The invention relates to the field of air conditioning and ventilation, and in particular to a reheating shunt system. Background Art

[0002] The original unit used hot gas bypass for dehumidification and reheating, but the reheating heat could not be controlled, which could easily cause too much or too little heat to be diverted to the reheat coil. Without control, it would cause drastic fluctuations in indoor temperature and easily lead to over- or under-charging of refrigerant. Summary of the invention

[0003] The technical problem solved by the present invention is to provide a reheat split system which can control the temperature of dehumidification and reheat, prevent drastic fluctuation of indoor temperature, and adjust the refrigerant in the outdoor condenser and indoor reheat coil.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a reheat shunt system, including a piping system, the piping system is provided with a compressor for compressing air, a dehumidification component for removing indoor moisture, a reheat component for heating the indoor temperature, a recovery component for recovering excess refrigerant in the piping system and a temperature detection component for detecting indoor and outdoor temperatures, the compressor includes a compressor high-pressure end and a compressor low-pressure end, the dehumidification component is respectively connected to the compressor high-pressure end and the compressor low-pressure end, the reheat component is respectively connected to the compressor high-pressure end and the compressor low-pressure end, the recovery component is connected to the compressor low-pressure end, and also includes a control component for controlling the reheat shunt system, the dehumidification component, the reheat component, the recovery component and the temperature detection component are respectively connected to the control component, the compressor is used to compress air, the dehumidification component is used to remove indoor moisture, the reheat component is used to heat the indoor temperature after dehumidification, the recovery component is used to recover excess refrigerant in the piping system, and the temperature detection component is used to detect indoor and outdoor temperatures.

[0005] Furthermore, the dehumidification component includes a first solenoid valve connected to the high-pressure end of the compressor, the end of the first solenoid valve away from the high-pressure end of the compressor is connected to a four-way reversing valve, the four-way reversing valve includes a reversing valve part and a reversing valve part, the first solenoid valve is connected to the reversing valve part, a condenser for condensing the gas discharged from the compressor is arranged on the end of the four-way reversing valve away from the first solenoid valve on the piping system, a liquid reservoir for placing refrigerant is arranged on the end of the condenser away from the four-way reversing valve, a first expansion valve is arranged on the end of the liquid reservoir away from the condenser, a surface cooler for dehumidification is arranged on the end of the first expansion valve away from the liquid reservoir, the end of the surface cooler away from the first expansion valve is connected to the reversing valve part, the reversing valve part is connected to the low-pressure end of the compressor, the first solenoid valve is connected to the control component, the condenser is used to condense the gas discharged from the compressor, the liquid reservoir is used to place the refrigerant, and the surface cooler is used for dehumidification.

[0006] Furthermore, a drying filter for removing moisture and impurities from the reheat shunt system is provided on the pipeline system between the liquid storage device and the first expansion valve. The drying filter is used to remove moisture and impurities from the reheat shunt system.

[0007] Furthermore, the reheat component includes a second solenoid valve connected to the high-pressure end of the compressor, the second solenoid valve is arranged in parallel with the first solenoid valve, a reheat coil for heating to increase the indoor temperature is arranged on the end of the piping system located at the second solenoid valve away from the compressor, the end of the reheat coil away from the second solenoid valve is connected to the condenser, the second solenoid valve is connected to the control component, and the reheat coil is used for heating to increase the indoor temperature.

[0008] Furthermore, the recovery component includes a third solenoid valve arranged between the reheat coil and the low-pressure end of the compressor for recovering excess refrigerant in the reheat coil, a high-pressure pressure sensor for detecting the pressure at the high-pressure end of the compressor is arranged at the high-pressure end of the compressor, and a low-pressure pressure sensor for detecting the pressure at the low-pressure end of the compressor is arranged at the low-pressure end of the compressor. The third solenoid valve, the high-pressure pressure sensor and the low-pressure pressure sensor are respectively connected to the control component. When the third solenoid valve is opened, it is used to recover excess refrigerant in the reheat coil, the high-pressure pressure sensor is used to detect the pressure at the high-pressure end of the compressor, and the low-pressure pressure sensor is used to detect the pressure at the low-pressure end of the compressor.

[0009] Furthermore, it also includes an indoor unit and an outdoor unit, the surface cooler, reheat coil and first expansion valve are arranged in the indoor unit, the compressor, first solenoid valve, four-way reversing valve, condenser, liquid storage tank, second solenoid valve are arranged in the outdoor unit, and the indoor unit is provided with an air inlet and an air outlet.

[0010] Furthermore, the temperature detection component includes a first temperature sensor arranged at the high-pressure end of the compressor for detecting the temperature at the high-pressure end of the compressor, a second temperature sensor arranged at the low-pressure end of the compressor for detecting the temperature at the low-pressure end of the compressor, a third temperature sensor arranged at the air inlet for detecting the temperature at the air inlet, a fourth temperature sensor arranged at the air outlet for detecting the temperature at the air outlet, and a fifth temperature sensor arranged indoors for detecting the indoor temperature. The first temperature sensor, the second temperature sensor, the third temperature sensor, the fourth temperature sensor and the fifth temperature sensor are respectively connected to the control component, the first temperature sensor is used to detect the temperature at the high-pressure end of the compressor, the second temperature sensor is used to detect the temperature at the low-pressure end of the compressor, the third temperature sensor is used to detect the temperature at the air inlet, the fourth temperature sensor is used to detect the temperature at the air outlet, and the fifth temperature sensor is used to detect the indoor temperature.

[0011] Furthermore, a first one-way valve for preventing reverse flow of refrigerant is arranged between the liquid storage tank and the surface cooler on the piping system, a second one-way valve for preventing reverse flow of refrigerant is arranged between the third solenoid valve and the low-pressure end of the compressor, a third one-way valve for preventing reverse flow of refrigerant is arranged between the reheat coil and the condenser, a fourth one-way valve for preventing reverse flow of refrigerant is arranged between the condenser and the first expansion valve, and the first one-way valve, the second one-way valve, the third one-way valve and the fourth one-way valve are all used to prevent reverse flow of refrigerant.

[0012] Furthermore, one end of the pipeline between the reheat coil and the condenser close to the condenser is arranged at the middle position of the condenser to ensure that the pressure after condensation can pass through the first expansion valve when the outdoor temperature is too low.

[0013] Furthermore, the reheat diversion system has four states: air conditioning state, dehumidification partial reheat state, dehumidification full load reheat state and normal air conditioning state. When the second solenoid valve is closed, the first solenoid valve is opened, and the third solenoid valve is closed, it is in the normal air conditioning state; when the second solenoid valve is opened, the first solenoid valve is opened, and the third solenoid valve is closed, it is in the dehumidification and partial reheat state; when the second solenoid valve is opened, the first solenoid valve is closed, and the third solenoid valve is closed, it is in the dehumidification and full load reheat state; when the second solenoid valve is closed, the first solenoid valve is opened, and the third solenoid valve is opened, it is in the normal air conditioning state.

[0014] The beneficial effects of the present invention are as follows: the temperature of the dehumidification and reheating in the present invention can be controlled to prevent drastic fluctuations in indoor temperature, and the refrigerant in the outdoor condenser and the indoor reheating coil can be adjusted. The compressor is used to compress air, the dehumidification component is used to remove indoor moisture, the reheat component is used to heat the indoor temperature after dehumidification, the recovery component is used to recover excess refrigerant in the piping system, and the temperature detection component is used to detect indoor and outdoor temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the reheat split system;

[0016] The markings in the figure are: 1. third temperature sensor; 2. surface cooler; 3. reheat coil; 4. fourth temperature sensor; 5. first expansion valve; 6. fifth temperature sensor; 7. first non-return valve; 8. drying filter; 9. liquid storage tank; 10. second solenoid valve; 11. third solenoid valve; 12. second non-return valve; 13. high-pressure pressure sensor; 14. first solenoid valve; 15. four-way reversing valve; 16. third non-return valve; 18. first temperature sensor; 19. second temperature sensor; 20. compressor; 21. low-pressure pressure sensor; 22. condenser; 23. fourth non-return valve; 30. indoor unit; 31. air inlet; 32. air outlet; 33. high-pressure end of compressor; 34. low-pressure end of compressor; 40. outdoor unit. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0018] like Figure 1The reheat split system shown in the figure includes a piping system, on which a compressor 20 for compressing air, a dehumidification component for removing indoor moisture, a reheat component for heating the indoor temperature, a recovery component for recovering excess refrigerant in the piping system, and a temperature detection component for detecting indoor and outdoor temperatures are arranged. The compressor 20 includes a compressor high-pressure end 33 and a compressor low-pressure end 34, the dehumidification component is connected to the compressor high-pressure end 33 and the compressor low-pressure end 34 respectively, the reheat component is connected to the compressor high-pressure end 33 and the compressor low-pressure end 34 respectively, the recovery component is connected to the compressor low-pressure end 34, and also includes a temperature detection component for controlling The control component of the reheat split system is configured, the dehumidification component, the reheat component, the recovery component and the temperature detection component are respectively connected to the control component, the compressor 20 is used to compress air, the dehumidification component is used to remove indoor moisture, the reheat component is used to heat the indoor temperature after dehumidification, the recovery component is used to recover excess refrigerant in the piping system to prevent lack of refrigerant in normal air-conditioning state, the temperature detection component is used to detect indoor and outdoor temperatures, the control component includes a controller, the controller can be PCOX000AB0 or ​​JC01-COD-202, and PCOX000AB0 is selected in this implementation case.

[0019] On the basis of the above, the dehumidification component includes a first solenoid valve 14 connected to the high-pressure end 33 of the compressor, and the end of the first solenoid valve 14 away from the high-pressure end 33 of the compressor is connected to a four-way reversing valve 15, and the four-way reversing valve 15 includes a reversing valve part and a reversing valve part. The first solenoid valve 14 is connected to the reversing valve part, and a condenser 22 for condensing the gas discharged from the compressor 20 is provided on the end of the four-way reversing valve 15 away from the first solenoid valve 14 on the piping system, and a refrigerant is placed on the end of the condenser 22 away from the four-way reversing valve 15. A liquid reservoir 9, wherein a first expansion valve 5 is arranged on one end of the liquid reservoir 9 away from the condenser 22, a surface cooler 2 for dehumidification is arranged on one end of the first expansion valve 5 away from the liquid reservoir 9, the end of the surface cooler 2 away from the first expansion valve 5 is connected to the second part of the reversing valve, the second part of the reversing valve is connected to the low-pressure end 34 of the compressor, the first solenoid valve 14 is connected to the control component, the condenser 22 is used to condense the gas discharged from the compressor 20, the liquid reservoir 9 is used to place the refrigerant, the surface cooler 2 is used for dehumidification, and the first expansion valve 5 in this embodiment is an electronic expansion valve.

[0020] On the basis of the above, a drying filter 8 for removing moisture and impurities from the reheat shunt system is provided on the piping system between the liquid storage tank 9 and the first expansion valve 5. The drying filter 8 is used to remove moisture and impurities from the reheat shunt system.

[0021] On the basis of the above, the reheat component includes a second solenoid valve 10 connected to the high-pressure end 33 of the compressor, the second solenoid valve 10 is arranged in parallel with the first solenoid valve 14, and a reheat coil 3 for heating to increase the indoor temperature is arranged on the end of the second solenoid valve 10 away from the compressor 20 on the piping system, the end of the reheat coil 3 away from the second solenoid valve 10 is connected to the condenser 22, the second solenoid valve 10 is connected to the control component, and the reheat coil 3 is used for heating to increase the indoor temperature.

[0022] On the basis of the above, the recovery component includes a third solenoid valve 11 arranged between the reheat coil 3 and the low-pressure end 34 of the compressor for recovering excess refrigerant in the reheat coil 3, a high-pressure pressure sensor 13 for detecting the pressure at the high-pressure end of the compressor is arranged at the high-pressure end of the compressor, and a low-pressure pressure sensor 21 for detecting the pressure at the low-pressure end of the compressor is arranged at the low-pressure end of the compressor. The third solenoid valve 11, the high-pressure pressure sensor 13 and the low-pressure pressure sensor 21 are respectively connected to the control component. When the third solenoid valve 11 is opened, it is used to recover excess refrigerant in the reheat coil 3. The high-pressure pressure sensor 13 is used to detect the pressure at the high-pressure end of the compressor, and the low-pressure pressure sensor 21 is used to detect the pressure at the low-pressure end of the compressor. The pressure boundary values ​​of the high-pressure pressure sensor 13 and the low-pressure pressure sensor 21 are pre-set on the control component.

[0023] On the basis of the above, it also includes an indoor unit 30 and an outdoor unit 40, the surface cooler 2, the reheat coil 3 and the first expansion valve 5 are arranged in the indoor unit 30, the compressor 20, the first solenoid valve 14, the four-way reversing valve 15, the condenser 22, the liquid storage tank 9, and the second solenoid valve 10 are arranged in the outdoor unit 40, and the indoor unit 30 is provided with an air inlet 31 and an air outlet 32.

[0024] On the basis of the above, the temperature detection component includes a first temperature sensor 18 arranged at the high-pressure end 33 of the compressor for detecting the temperature at the high-pressure end 33 of the compressor, a second temperature sensor 19 arranged at the low-pressure end 34 of the compressor for detecting the temperature at the low-pressure end 34 of the compressor, a third temperature sensor 1 arranged at the air inlet 31 for detecting the temperature at the air inlet 31, a fourth temperature sensor 4 arranged at the air outlet 32 ​​for detecting the temperature at the air outlet 32, and a fifth temperature sensor 6 arranged indoors for detecting the indoor temperature. The first temperature sensor 18, the second temperature sensor 19, the third temperature sensor 1, The fourth temperature sensor 4 and the fifth temperature sensor 6 are respectively connected to the control component, the first temperature sensor 18 is used to detect the temperature at the high-pressure end 33 of the compressor, the second temperature sensor 19 is used to detect the temperature at the low-pressure end 34 of the compressor, the third temperature sensor 1 is used to detect the temperature at the air inlet 31, the fourth temperature sensor 4 is used to detect the temperature at the air outlet 32, and the fifth temperature sensor 6 is used to detect the indoor temperature. The temperatures of the first temperature sensor 18, the second temperature sensor 19, the third temperature sensor 1, the fourth temperature sensor 4 and the fifth temperature sensor 6 are all pre-set on the control component.

[0025] On the basis of the above, a first one-way valve 7 for preventing the reverse flow of refrigerant is arranged between the liquid storage tank 9 and the surface cooler 2 on the piping system, a second one-way valve 12 for preventing the reverse flow of refrigerant is arranged between the third solenoid valve 11 and the low-pressure end 34 of the compressor, a third one-way valve 16 for preventing the reverse flow of refrigerant is arranged between the reheat coil 3 and the condenser 22, and a fourth one-way valve 23 for preventing the reverse flow of refrigerant is arranged between the condenser 22 and the first expansion valve 5. The first one-way valve 7, the second one-way valve 12, the third one-way valve 16 and the fourth one-way valve 23 are all used to prevent the reverse flow of refrigerant.

[0026] On the basis of the above, the end of the pipeline between the reheat coil 3 and the condenser 22 close to the condenser 22 is set in the middle position of the condenser 22 to ensure that the pressure after condensation can also pass through the first expansion valve 5 when the outdoor temperature is too low.

[0027] On the basis of the above, the reheat diversion system has four states: air conditioning state, dehumidification partial reheat state, dehumidification full load reheat state and normal air conditioning state. When the second solenoid valve 10 is closed, the first solenoid valve 14 is opened, and the third solenoid valve 11 is closed, it is in the normal air conditioning state; when the second solenoid valve 10 is opened, the first solenoid valve 14 is opened, and the third solenoid valve 11 is closed, it is in the dehumidification partial reheat state; when the second solenoid valve 10 is opened, the first solenoid valve 14 is closed, and the third solenoid valve 11 is closed, it is in the dehumidification full load reheat state; when the second solenoid valve 10 is closed, the first solenoid valve 14 is opened, and the third solenoid valve 11 is opened, it is in the normal air conditioning state.

[0028] On the basis of the above, first, the second solenoid valve 10 is closed, the first solenoid valve 14 is opened, and the third solenoid valve 11 is closed in a normal air-conditioning state. When the control component receives an instruction to dehumidify, the control component controls the second solenoid valve 10 to open, the first solenoid valve 14 to open, and the third solenoid valve 11 to close for partial heating treatment of dehumidification. When the fifth temperature sensor 6 detects that the indoor temperature is lower than the preset value, it sends a signal to the control component. The control component controls the second solenoid valve 10 to open, the first solenoid valve 14 to close, and the third solenoid valve 11 to close for full-load reheating treatment of dehumidification. When the fifth temperature sensor 6 detects that the indoor temperature is higher than the preset value, it sends a signal to the control component. The control component controls the second solenoid valve 10 to close and the first solenoid valve 14 to open. At the same time, when the low-pressure pressure sensor 21 detects that the pressure at the low-pressure end 34 of the compressor is lower than the preset value, it sends a signal to the control component. The control component controls the third solenoid valve 11 to open to recover the excess refrigerant in the reheat coil 3 and then enter the normal air-conditioning state.

[0029] On the basis of the above, the first solenoid valve 14 and the second solenoid valve 10 can be replaced with a first electronic expansion valve and a second electronic expansion valve, which can realize real-time control of the temperature at the air outlet and is more economical.

[0030] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A reheat split flow system, including a piping system, characterized in that: The pipeline system is provided with a compressor (20) for compressing air, a dehumidification component for removing indoor moisture, a reheat component for heating the indoor temperature, a recovery component for recovering excess refrigerant in the pipeline system, and a temperature detection component for detecting indoor and outdoor temperatures. The compressor (20) comprises a compressor high-pressure end (33) and a compressor low-pressure end (34). The dehumidification component is connected to the compressor high-pressure end (33) and the compressor low-pressure end (34) respectively. The reheat component is connected to the compressor high-pressure end (33) and the compressor low-pressure end (34) respectively. The recovery component is connected to the compressor low-pressure end (34). The system also comprises a control component for controlling the reheat flow diversion system. The dehumidification component, the reheat component, the recovery component and the temperature detection component are connected to the control component respectively. The dehumidification component comprises a first solenoid valve (14) connected to a high-pressure end (33) of a compressor, an end of the first solenoid valve (14) away from the high-pressure end (33) of the compressor is connected to a four-way reversing valve (15), the four-way reversing valve (15) comprises a reversing valve part and a reversing valve part, the first solenoid valve (14) is connected to the reversing valve part, and a condenser (22) for condensing gas discharged from the compressor (20) is provided on the end of the four-way reversing valve (15) away from the first solenoid valve (14) on the pipeline system, the condenser (22) A liquid storage device (9) for storing refrigerant is provided at one end of the condenser (22) away from the four-way reversing valve (15), a first expansion valve (5) is provided at one end of the liquid storage device (9) away from the condenser (22), a surface cooler (2) for dehumidification is provided at one end of the first expansion valve (5) away from the liquid storage device (9), one end of the surface cooler (2) away from the first expansion valve (5) is connected to the second part of the reversing valve, the second part of the reversing valve is connected to the low-pressure end (34) of the compressor, the first solenoid valve (14) is connected to the control component, A drying filter (8) for removing moisture and impurities from the reheating flow distribution system is provided between the liquid storage device (9) and the first expansion valve (5) on the pipeline system. The reheating assembly comprises a second solenoid valve (10) connected to a high-pressure end (33) of a compressor, the second solenoid valve (10) being arranged in parallel with a first solenoid valve (14), a reheating coil (3) for heating to increase indoor temperature being arranged on an end of the pipeline system located away from the compressor (20) of the second solenoid valve (10), the end of the reheating coil (3) away from the second solenoid valve (10) being connected to a condenser (22), the second solenoid valve (10) being connected to a control assembly, The recovery component comprises a third solenoid valve (11) arranged between the reheat coil (3) and the low-pressure end (34) of the compressor and used for recovering excess refrigerant in the reheat coil (3); a high-pressure pressure sensor (13) for detecting the pressure at the high-pressure end of the compressor is arranged at the high-pressure end of the compressor; a low-pressure pressure sensor (21) for detecting the pressure at the low-pressure end of the compressor is arranged at the low-pressure end of the compressor; the third solenoid valve (11), the high-pressure pressure sensor (13) and the low-pressure pressure sensor (21) are respectively connected to the control component; The reheat split system has four states: air conditioning state, dehumidification partial reheat state, dehumidification full load reheat state and normal air conditioning state. One end of the pipeline between the reheat coil (3) and the condenser (22) close to the condenser (22) is arranged at a middle position of the condenser (22).

2. The reheat split system according to claim 1, characterized in that: The invention also comprises an indoor unit (30) and an outdoor unit (40); the surface cooler (2), the reheat coil (3) and the first expansion valve (5) are arranged in the indoor unit (30); the compressor (20), the first solenoid valve (14), the four-way reversing valve (15), the condenser (22), the liquid storage device (9) and the second solenoid valve (10) are arranged in the outdoor unit (40); and the indoor unit (30) is provided with an air inlet (31) and an air outlet (32).

3. The reheat split system according to claim 2, characterized in that: The temperature detection component comprises a first temperature sensor (18) arranged at the high-pressure end (33) of the compressor for detecting the temperature at the high-pressure end (33) of the compressor, a second temperature sensor (19) arranged at the low-pressure end (34) of the compressor for detecting the temperature at the low-pressure end (34) of the compressor, a third temperature sensor (1) arranged at the air inlet (31) for detecting the temperature at the air inlet (31), a fourth temperature sensor (4) arranged at the air outlet (32) for detecting the temperature at the air outlet (32), and a fifth temperature sensor (6) arranged indoors for detecting the indoor temperature. The first temperature sensor (18), the second temperature sensor (19), the third temperature sensor (1), the fourth temperature sensor (4) and the fifth temperature sensor (6) are respectively connected to the control component.

4. The reheat split system according to claim 1, characterized in that: A first one-way valve (7) for preventing the refrigerant from flowing in reverse is arranged between the liquid accumulator (9) and the surface cooler (2) on the piping system, a second one-way valve (12) for preventing the refrigerant from flowing in reverse is arranged between the third solenoid valve (11) and the low-pressure end (34) of the compressor, a third one-way valve (16) for preventing the refrigerant from flowing in reverse is arranged between the reheat coil (3) and the condenser (22), and a fourth one-way valve (23) for preventing the refrigerant from flowing in reverse is arranged between the condenser (22) and the first expansion valve (5).

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