CN221005540U - Variable-frequency overlapping type air source heat pump water heater - Google Patents
Variable-frequency overlapping type air source heat pump water heater Download PDFInfo
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- CN221005540U CN221005540U CN202322778428.6U CN202322778428U CN221005540U CN 221005540 U CN221005540 U CN 221005540U CN 202322778428 U CN202322778428 U CN 202322778428U CN 221005540 U CN221005540 U CN 221005540U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 64
- 239000007788 liquid Substances 0.000 claims abstract description 46
- 238000001035 drying Methods 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims 1
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 239000003507 refrigerant Substances 0.000 description 16
- 230000005611 electricity Effects 0.000 description 7
- 230000007613 environmental effect Effects 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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Abstract
The utility model relates to the technical field of air source heat pumps, in particular to a variable-frequency cascade air source heat pump water heater. The device comprises a high-temperature-level compressor, a low-temperature-level compressor and an electric control box, wherein the discharge end of the high-temperature-level compressor is connected with the feed end of a condenser through a first pipeline, the discharge end of the condenser is connected with the feed end of a first dry filter through a pipeline, the discharge end of the first dry filter is connected with the feed end of a first liquid reservoir, the discharge end of the first liquid reservoir is connected with the feed end of a thermal expansion valve through a pipeline, the discharge end of the thermal expansion valve is connected with the first feed end of an intermediate heat exchanger through a pipeline, and the first discharge end of the intermediate heat exchanger is connected with the feed end of a first gas-liquid separator through a second pipeline. The utility model provides a stable heat source for the high-temperature-level unit by controlling the high-pressure value of the low-temperature-level unit and adopting the cascade variable-frequency compression technology, thereby realizing more stable operation, meeting the requirement of high-temperature hot water, avoiding electric auxiliary heat and realizing no attenuation of the ring-temperature heating quantity at-12 ℃.
Description
Technical Field
The utility model relates to the technical field of air source heat pumps, in particular to a variable-frequency cascade air source heat pump water heater.
Background
In the prior art, in the cascade air source heat pump water heater used in the market, the heat supply quantity of a unit is influenced by the ambient temperature and the ambient pressure, and along with the reduction of the ambient temperature and the reduction of the ambient pressure, the heat supply quantity of the unit is also reduced along with the reduction, and the water supply quantity or the water supply temperature are reduced, so that the using effect is influenced.
Disclosure of utility model
Aiming at the defects in the prior art, the application provides the variable-frequency cascade air source heat pump water heater, which is used for automatically adjusting the frequency of the low-temperature variable-frequency compressor by controlling the high-pressure value of the high-pressure side of the low-temperature unit to adapt to the change caused by the change of the ambient temperature and the pressure, providing a stable heat source for the high-temperature unit, ensuring that the hot water supply capacity of the unit is not influenced by the ambient temperature and the pressure, ensuring that the unit operates more stably and meeting the hot water demand of the high-temperature unit.
The technical scheme adopted by the utility model is as follows:
The variable-frequency cascade air source heat pump water heater comprises a high-temperature-stage compressor, a low-temperature-stage compressor and an electric control box, wherein the discharge end of the high-temperature-stage compressor is connected with the feed end of a condenser through a first pipeline, the discharge end of the condenser is connected with the feed end of a first drying filter through a pipeline, the discharge end of the first drying filter is connected with the feed end of a first liquid reservoir, the discharge end of the first liquid reservoir is connected with the feed end of a thermal expansion valve through a pipeline, the discharge end of the thermal expansion valve is connected with the first feed end of an intermediate heat exchanger through a pipeline, the first discharge end of the intermediate heat exchanger is connected with the feed end of a first gas-liquid separator through a second pipeline, and the discharge end of the first gas-liquid separator is connected with the feed end of the high-temperature-stage compressor through a third pipeline;
The water outlet end of the condenser is connected with the water inlet end of the water storage tank through a pipeline, the water outlet end of the water storage tank is connected with the water inlet end of the water pump through a pipeline, the discharge end of the water pump is connected with the water inlet end of the condenser through a pipeline, the first pipeline is connected with a first pressure sensor, the first pressure sensor is electrically connected with the electric control box, the first pipeline is connected with a first temperature sensor, the first temperature sensor is electrically connected with the electric control box, the third pipeline is connected with a second pressure sensor, and the second pressure sensor is electrically connected with the electric control box;
The discharge end of the low-temperature-stage compressor is connected with the feed end of the oil-gas separator through a fourth pipeline, the first discharge end of the oil-gas separator is connected with the second feed end of the intermediate heat exchanger through a pipeline, the second discharge end of the intermediate heat exchanger is connected with the feed end of the second dry filter through a pipeline, the discharge end of the second dry filter is connected with the feed end of the second liquid reservoir through a pipeline, the discharge end of the second liquid reservoir is connected with the first feed end of the economizer through a pipeline, the first discharge end of the economizer is connected with the feed end of the second electronic expansion valve through a pipeline, the discharge end of the second electronic expansion valve is connected with the feed end of the distributor through a pipeline, the discharge end of the distributor is connected with the feed end of the fin type evaporator through a pipeline, and the discharge end of the second air-liquid separator is connected with the first feed end of the low-temperature-stage compressor through a pipeline;
The second discharge end of the oil-gas separator is connected with the first feed end of the low-temperature-stage compressor through a pipeline, the discharge end of the second liquid reservoir is connected with the feed end of the first electronic expansion valve through a pipeline, the discharge end of the first electronic expansion valve is connected with the second feed end of the economizer through a pipeline, and the second discharge end of the economizer is connected with the second feed end of the low-temperature-stage compressor through a pipeline;
The second temperature sensor is connected to the discharge end of low temperature level compressor, and second temperature sensor and electrical control box electricity are connected, and sixth pressure sensor is connected to the discharge end of low temperature level compressor, and sixth pressure sensor and electrical control box electricity are connected, and fifth pressure sensor is connected to the first feed end of low temperature level compressor, and fifth pressure sensor and electrical control box electricity are connected, third temperature sensor is connected to the second discharge end of economic ware, and third temperature sensor and electrical control box electricity are connected, and third pressure sensor is connected to the second discharge end of economic ware, and third pressure sensor and electrical control box electricity are connected, and first electronic expansion valve and electrical control box electricity are connected, and second electronic expansion valve and electrical control box electricity are connected. The discharge end of the fin type evaporator is connected with a fourth temperature sensor, the fourth temperature sensor is electrically connected with the electric control box, the discharge end of the fin type evaporator is connected with a fourth pressure sensor, the fourth pressure sensor is electrically connected with the electric control box, the low-temperature-level compressor is electrically connected with the electric control box, and the high-temperature-level compressor is electrically connected with the electric control box.
Furthermore, the high-temperature-stage compressor adopts a fixed-frequency compressor, and the low-temperature-stage compressor adopts a variable-frequency compressor.
Further, the electric control box is electrically connected with a fifth temperature sensor.
Further, an axial flow fan is arranged on one side of the air outlet end of the fin type evaporator, and the axial flow fan can accelerate the air flow of the air outlet end of the fin type evaporator.
Further, the water pump is electrically connected with the electric control box.
Further, the discharge end of the high-temperature-stage compressor is connected with a first pressure gauge, and the feed end of the high-temperature-stage compressor is connected with a second pressure gauge.
Further, the discharge end of the low-temperature-stage compressor is connected with a third pressure gauge, and the first feed back end of the low-temperature-stage compressor is connected with a fourth pressure gauge.
The beneficial effects of the utility model are as follows:
The utility model provides a stable heat source for the high-temperature-level unit by controlling the high-pressure value of the low-temperature-level unit and adopting the cascade variable-frequency compression technology, so that the operation is more stable, the requirement of high-temperature hot water is met, no electric auxiliary heat is needed, and the ring-temperature heating quantity at-12 ℃ is not attenuated; and the control system automatically controls the start and stop of the air supplementing and enthalpy increasing system according to the exhaust temperature of the low-temperature-level compressor, so that the reliable operation of the unit is ensured.
Drawings
Fig. 1 is a schematic diagram of the operation of the present utility model.
Wherein: 1. a high temperature stage compressor; 2. a first pressure sensor; 3. a first temperature sensor; 4. a condenser; 5. a first dry filter; 6. a first reservoir; 7. a thermal expansion valve; 8. an intermediate heat exchanger; 9. a first gas-liquid separator; 10. a second pressure sensor; 11. a low temperature stage compressor; 12. a second temperature sensor; 13. a sixth pressure sensor; 14. an oil-gas separator; 15. a second dry filter; 16. a second reservoir; 17. a first electronic expansion valve; 18. an economizer; 19. a third temperature sensor; 20. a third pressure sensor; 21. a second electronic expansion valve; 22. a dispenser; 23. a fin evaporator; 24. an axial flow fan; 25. a fourth temperature sensor; 26. a fourth pressure sensor; 27. a second gas-liquid separator; 28. a fifth pressure sensor; 29. an electrical control box; 30. a fifth temperature sensor; 31. a water pump; 32. a water storage tank; 33. a first pipeline; 34. a second pipeline; 35. a third pipeline; 36. a fourth pipeline; 37. a first pressure gauge; 38. a second pressure gauge; 39. a third pressure gauge; 40. and a fourth pressure gauge.
Detailed Description
The following describes specific embodiments of the present utility model with reference to the drawings.
As shown in fig. 1, the variable frequency cascade air source heat pump water heater comprises a high-temperature-stage compressor 1, a low-temperature-stage compressor 11 and an electric control box 29, wherein the discharge end of the high-temperature-stage compressor 1 is connected with the feed end of a condenser 4 through a first pipeline 33, the discharge end of the condenser 4 is connected with the feed end of a first dry filter 5 through a pipeline, the discharge end of the first dry filter 5 is connected with the feed end of a first liquid reservoir 6, the discharge end of the first liquid reservoir 6 is connected with the feed end of a thermal expansion valve 7 through a pipeline, the discharge end of the thermal expansion valve 7 is connected with the first feed end of an intermediate heat exchanger 8 through a pipeline, the first discharge end of the intermediate heat exchanger 8 is connected with the feed end of a first gas-liquid separator 9 through a second pipeline 34, and the discharge end of the first gas-liquid separator 9 is connected with the feed end of the high-temperature-stage compressor 1 through a third pipeline 35.
As shown in fig. 1, the water outlet end of the condenser 4 is connected with the water inlet end of the water storage tank 32 through a pipeline, the water outlet end of the water storage tank 32 is connected with the water inlet end of the water pump 31 through a pipeline, and the discharge end of the water pump 31 is connected with the water inlet end of the condenser 4 through a pipeline.
As shown in fig. 1, the first pressure sensor 2 is connected to the first pipe 33, and the first pressure sensor 2 is electrically connected to the electrical control box 29. The first pipe 33 is connected to the first temperature sensor 3, and the first temperature sensor 3 is electrically connected to the electrical control box 29. The third pipeline 35 is connected with the second pressure sensor 10, and the second pressure sensor 10 is electrically connected with the electrical control box 29.
As shown in fig. 1, the water pump 31 is electrically connected to the electrical control box 29. The high-temperature-stage compressor 1 is electrically connected to an electrical control box 29.
As shown in fig. 1, the discharge end of the low-temperature-stage compressor 11 is connected with the feed end of the oil-gas separator 14 through a fourth pipeline 36, the first discharge end of the oil-gas separator 14 is connected with the second feed end of the intermediate heat exchanger 8 through a pipeline, the second discharge end of the intermediate heat exchanger 8 is connected with the feed end of the second dry filter 15 through a pipeline, the discharge end of the second dry filter 15 is connected with the feed end of the second liquid reservoir 16 through a pipeline, the discharge end of the second liquid reservoir 16 is connected with the first feed end of the economizer 18 through a pipeline, the first discharge end of the economizer 18 is connected with the feed end of the second electronic expansion valve 21 through a pipeline, the discharge end of the second electronic expansion valve 21 is connected with the feed end of the distributor 22 through a pipeline, the discharge end of the distributor 22 is connected with the feed end of the fin evaporator 23 through a pipeline, the discharge end of the fin evaporator 23 is connected with the feed end of the second gas-liquid separator 27 through a pipeline, and the discharge end of the second gas-liquid separator 27 is connected with the first feed end of the low-temperature-stage compressor 11 through a pipeline.
As shown in fig. 1, the second discharge end of the oil separator 14 is connected to the first feed end of the low-temperature stage compressor 11 through a pipeline. The discharge end of the second liquid reservoir 16 is connected with the feed end of the first electronic expansion valve 17 through a pipeline, the discharge end of the first electronic expansion valve 17 is connected with the second feed end of the economizer 18 through a pipeline, and the second discharge end of the economizer 18 is connected with the second feed end of the low-temperature-stage compressor 11 through a pipeline.
As shown in fig. 1, a discharge end of the low-temperature-stage compressor 11 is connected to a second temperature sensor 12, and the second temperature sensor 12 is electrically connected to an electrical control box 29. The discharge end of the low-temperature-stage compressor 11 is connected with a sixth pressure sensor 13, and the sixth pressure sensor 13 is electrically connected with an electrical control box 29. The first feed end of the low temperature stage compressor 11 is connected to a fifth pressure sensor 28, and the fifth pressure sensor 28 is electrically connected to an electrical control box 29.
As shown in fig. 1, the second discharging end of the economizer 18 is connected with a third temperature sensor 19, the third temperature sensor 19 is electrically connected with an electrical control box 29, the second discharging end of the economizer 18 is connected with a third pressure sensor 20, and the third pressure sensor 20 is electrically connected with the electrical control box 29. The first electronic expansion valve 17 is electrically connected to the electrical control box 29, and the second electronic expansion valve 21 is electrically connected to the electrical control box 29.
As shown in fig. 1, the discharge end of the fin type evaporator 23 is connected to a fourth temperature sensor 25, and the fourth temperature sensor 25 is electrically connected to an electrical control box 29. The discharge end of the fin evaporator 23 is connected with a fourth pressure sensor 26, and the fourth pressure sensor 26 is electrically connected with an electrical control box 29. The low-temperature stage compressor 11 is electrically connected to an electrical control box 29.
As shown in fig. 1, an axial flow fan 24 is disposed at one side of the air outlet end of the fin type evaporator 23, and the axial flow fan 24 can accelerate the air flow at the air outlet end of the fin type evaporator 23. The fifth temperature sensor 30 is electrically connected to the electrical control box 29.
As shown in fig. 1, the discharge end of the high-temperature-stage compressor 1 is connected to a first pressure gauge 37, and the feed end of the high-temperature-stage compressor 1 is connected to a second pressure gauge 38. The discharge end of the low-temperature-stage compressor 11 is connected with a third pressure gauge 39, and the first feed-back end of the low-temperature-stage compressor 11 is connected with a fourth pressure gauge 40.
The high-temperature-stage compressor 1 adopts a fixed-frequency compressor, and the low-temperature-stage compressor 11 adopts a variable-frequency compressor. The hot water supply quantity and the water temperature of the heat pump hot water unit are guaranteed by guaranteeing the high pressure and the low pressure of the high-temperature-stage compressor 1 to be constant, the high pressure of the high-temperature-stage compressor 1 is determined by the hot water flow and the hot water inlet temperature, the low pressure of the high-temperature-stage compressor 1 is determined by the heat source provided by the low-temperature stage, only the high pressure side of the low-temperature-stage compressor 11 can provide a stable heat source for the low pressure side of the high-temperature-stage compressor 1, and the variable-frequency cascade air source heat pump hot water machine can only provide a nominal quantity of high-temperature hot water.
In order to ensure that the high pressure side of the low temperature stage compressor 11 can provide a stable heat source for the low pressure side of the high temperature stage compressor 1, the electric control box 29 can automatically adjust the frequency of the low temperature stage compressor 11 according to the high pressure set value of the high pressure side of the low temperature stage compressor 11 to adapt to the change caused by the environmental temperature and pressure change, when the exhaust temperature of the low temperature stage compressor 1 is too high due to the environmental temperature and the environmental pressure change, the low temperature stage heat pump system can automatically start the air supplementing enthalpy increasing system to improve the heat supply quantity of the unit and reduce the exhaust temperature so as to ensure that the heat pump water heater can provide hot water with stable flow and temperature under different environmental temperatures and different environmental pressures.
The working principle of the high-temperature-level unit is as follows: the high-temperature compressor 1 compresses the sucked low-temperature low-pressure refrigerant vapor to a high-temperature high-pressure gas state, and enters the refrigerant side of the high-temperature condenser 4, the heat released by the refrigerant is gradually converted into high-pressure liquid, the released heat is taken away by high-temperature hot water flowing through the condenser 4, and the temperature of the hot water is raised. The high-pressure liquid refrigerant continuously flows forwards, is throttled by the first drying filter 5 and the first liquid receiver 6 through the thermal expansion valve 7, becomes a low-temperature low-pressure vapor-liquid mixed state, enters the evaporation side of the intermediate heat exchanger 8, absorbs heat in the refrigerant gas at the condensation side of the intermediate heat exchanger 8, gradually evaporates into a gas state, and the gas state refrigerant is sucked into the next cycle by the high-temperature compressor 1 after flowing through the first vapor-liquid separator 9. The first pressure sensor 2, the first temperature sensor 3 and the second pressure sensor 10 are arranged at the high-temperature stage of the high-temperature compressor unit, the electric control box 29 can judge whether the operation of the high-temperature stage of the unit is normal according to the detected high-pressure side pressure, low-pressure side pressure and exhaust temperature, and when the pressure side pressure, the low-pressure side pressure and the exhaust temperature of the high-temperature stage are abnormal, the unit is stopped in a fault mode or protective operation is performed when the parameters reach warning values.
The working principle of the low-temperature-level unit is as follows: the low-temperature-stage compressor 11 compresses the sucked low-temperature low-pressure refrigerant vapor to a high-temperature high-pressure gas state, and the vapor is separated by the oil-gas separator 14 and enters the condensation side of the intermediate heat exchanger 8, the heat released by the refrigerant is gradually converted into high-pressure liquid, and the released heat is taken away by the refrigerant flowing through the evaporation side of the intermediate heat exchanger 8. The high-pressure liquid refrigerant continues to flow forwards and is divided into two paths after passing through the second drying filter 15 and the second liquid receiver 16, one path is throttled by the first electronic expansion valve 17 and then becomes a low-temperature medium-pressure vapor-liquid mixed state, the low-temperature medium-pressure vapor-liquid mixed state enters the evaporation side of the economizer 18, the vapor-liquid mixed state refrigerant absorbs heat in the refrigerant flowing through the liquid side of the economizer 18, gradually evaporates into a gas state, and is sucked into the next cycle by the vapor-supplementing enthalpy-increasing port of the low-temperature-stage compressor 11. The other path of the refrigerant is supercooled by the economizer 18 and then continuously flows forwards, is throttled by the second electronic expansion valve 21 and then becomes a low-temperature low-pressure vapor-liquid mixed state, the refrigerant enters the fin type evaporator 23 through the distributor 22, the refrigerant in the vapor-liquid mixed state absorbs heat in air flowing through the fin type evaporator 23 and gradually evaporates into a gas state, and the gas state refrigerant is sucked into the next cycle by the low-temperature stage compressor 11 after flowing through the second vapor-liquid separator 27. The low-temperature-stage unit is provided with a second temperature sensor 12, a sixth pressure sensor 13, a fifth pressure sensor 28, a third temperature sensor 19, a third pressure sensor 20, a fourth temperature sensor 25, a fourth pressure sensor 26 and a fifth temperature sensor 30. The electrical control box 29 automatically adjusts the frequency of the low-temperature-stage compressor 11 according to the pressure detected by the sixth pressure sensor 13, so that the pressure detected by the sixth sensor 13 approaches the set value. The electric control box 29 automatically adjusts the frequency of the low-temperature-stage compressor 11 and the on-off state of the first electronic expansion valve 17 according to the exhaust temperature and the high pressure detected by the second temperature sensor 12 and the sixth sensor 13. The electric control box 29 automatically adjusts the opening of the first electronic expansion valve 17 according to the air-supplementing temperature and the air-supplementing pressure detected by the third temperature sensor 19 and the third pressure sensor 20. The electronic control box 29 automatically adjusts the opening degree of the second electronic expansion valve 21 according to the intake air temperature and the intake air pressure detected by the fourth temperature sensor 25 and the fourth pressure sensor 26.
The above description is intended to illustrate the utility model and not to limit it, the scope of which is defined by the claims, and any modifications can be made within the scope of the utility model.
Claims (7)
1. The utility model provides a frequency conversion cascade air source heat pump water heater, includes high temperature level compressor (1), low temperature level compressor (11) and electric control box (29), its characterized in that: the discharge end of the high-temperature-stage compressor (1) is connected with the feed end of the condenser (4) through a first pipeline (33), the discharge end of the condenser (4) is connected with the feed end of the first dry filter (5) through a pipeline, the discharge end of the first dry filter (5) is connected with the feed end of the first liquid reservoir (6), the discharge end of the first liquid reservoir (6) is connected with the feed end of the thermostatic expansion valve (7) through a pipeline, the discharge end of the thermostatic expansion valve (7) is connected with the first feed end of the intermediate heat exchanger (8) through a pipeline, the first discharge end of the intermediate heat exchanger (8) is connected with the feed end of the first gas-liquid separator (9) through a second pipeline (34), and the discharge end of the first gas-liquid separator (9) is connected with the feed end of the high-temperature-stage compressor (1) through a third pipeline (35);
The water outlet end of the condenser (4) is connected with the water inlet end of the water storage tank (32) through a pipeline, the water outlet end of the water storage tank (32) is connected with the water inlet end of the water pump (31) through a pipeline, the discharge end of the water pump (31) is connected with the water inlet end of the condenser (4) through a pipeline, the first pipeline (33) is connected with the first pressure sensor (2), the first pressure sensor (2) is electrically connected with the electric control box (29), the first pipeline (33) is connected with the first temperature sensor (3), the first temperature sensor (3) is electrically connected with the electric control box (29), the third pipeline (35) is connected with the second pressure sensor (10), and the second pressure sensor (10) is electrically connected with the electric control box (29);
The discharge end of the low-temperature-stage compressor (11) is connected with the feed end of the oil-gas separator (14) through a fourth pipeline (36), the first discharge end of the oil-gas separator (14) is connected with the second feed end of the intermediate heat exchanger (8) through a pipeline, the second discharge end of the intermediate heat exchanger (8) is connected with the feed end of the second drying filter (15) through a pipeline, the discharge end of the second drying filter (15) is connected with the feed end of the second liquid receiver (16) through a pipeline, the discharge end of the second liquid receiver (16) is connected with the first feed end of the economizer (18) through a pipeline, the first discharge end of the economizer (18) is connected with the feed end of the second electronic expansion valve (21) through a pipeline, the discharge end of the second electronic expansion valve (21) is connected with the feed end of the distributor (22) through a pipeline, the discharge end of the distributor (22) is connected with the feed end of the fin evaporator (23) through a pipeline, the discharge end of the fin evaporator (23) is connected with the feed end of the second gas-liquid separator (27) through a pipeline, and the first discharge end of the second gas-liquid separator (27) is connected with the first feed end of the low-temperature-stage compressor (11);
The second discharge end of the oil-gas separator (14) is connected with the first feed end of the low-temperature-stage compressor (11) through a pipeline, the discharge end of the second liquid reservoir (16) is connected with the feed end of the first electronic expansion valve (17) through a pipeline, the discharge end of the first electronic expansion valve (17) is connected with the second feed end of the economizer (18) through a pipeline, and the second discharge end of the economizer (18) is connected with the second feed end of the low-temperature-stage compressor (11) through a pipeline;
The discharge end of the low-temperature-stage compressor (11) is connected with a second temperature sensor (12), the second temperature sensor (12) is electrically connected with an electric control box (29), the discharge end of the low-temperature-stage compressor (11) is connected with a sixth pressure sensor (13), the sixth pressure sensor (13) is electrically connected with the electric control box (29), the first feed end of the low-temperature-stage compressor (11) is connected with a fifth pressure sensor (28), the fifth pressure sensor (28) is electrically connected with the electric control box (29), the second discharge end of the economizer (18) is connected with a third temperature sensor (19), the third temperature sensor (19) is electrically connected with the electric control box (29), the second discharge end of the economizer (18) is connected with a third pressure sensor (20), the third pressure sensor (20) is electrically connected with the electric control box (29), the first electronic expansion valve (17) is electrically connected with the electric control box (29), the second electronic expansion valve (21) is electrically connected with the electric control box (29), the second discharge end of the evaporator (23) is connected with the fourth temperature sensor (25), the fourth temperature sensor (25) is electrically connected with the fourth pressure sensor (29), the low-temperature-stage compressor (11) is electrically connected with the electrical control box (29), and the high-temperature-stage compressor (1) is electrically connected with the electrical control box (29).
2. The variable frequency cascade air source heat pump water heater as recited in claim 1 wherein: the high-temperature-stage compressor (1) adopts a fixed-frequency compressor, and the low-temperature-stage compressor (11) adopts a variable-frequency compressor.
3. The variable frequency cascade air source heat pump water heater as recited in claim 2 wherein: the electric control box (29) is electrically connected with a fifth temperature sensor (30).
4. A variable frequency cascade air source heat pump water heater as recited in claim 3 wherein: an axial flow fan (24) is arranged on one side of the air outlet end of the fin type evaporator (23), and the axial flow fan (24) can accelerate the air flow of the air outlet end of the fin type evaporator (23).
5. The variable frequency cascade air source heat pump water heater of claim 4 wherein: the water pump (31) is electrically connected with the electric control box (29).
6. The variable frequency cascade air source heat pump water heater of claim 5 wherein: the discharge end of the high-temperature-stage compressor (1) is connected with a first pressure gauge (37), and the feed end of the high-temperature-stage compressor (1) is connected with a second pressure gauge (38).
7. The variable frequency cascade air source heat pump water heater of claim 6 wherein: the discharge end of the low-temperature-stage compressor (11) is connected with a third pressure gauge (39), and the first feed-back end of the low-temperature-stage compressor (11) is connected with a fourth pressure gauge (40).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322778428.6U CN221005540U (en) | 2023-10-17 | 2023-10-17 | Variable-frequency overlapping type air source heat pump water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322778428.6U CN221005540U (en) | 2023-10-17 | 2023-10-17 | Variable-frequency overlapping type air source heat pump water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221005540U true CN221005540U (en) | 2024-05-24 |
Family
ID=91115243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322778428.6U Active CN221005540U (en) | 2023-10-17 | 2023-10-17 | Variable-frequency overlapping type air source heat pump water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221005540U (en) |
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2023
- 2023-10-17 CN CN202322778428.6U patent/CN221005540U/en active Active
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