CN215062958U - High-efficiency direct-current frequency-conversion cascade hot water unit - Google Patents
High-efficiency direct-current frequency-conversion cascade hot water unit Download PDFInfo
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- CN215062958U CN215062958U CN202120192005.4U CN202120192005U CN215062958U CN 215062958 U CN215062958 U CN 215062958U CN 202120192005 U CN202120192005 U CN 202120192005U CN 215062958 U CN215062958 U CN 215062958U
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Abstract
The utility model discloses a high-efficiency direct-current frequency conversion overlapping hot water unit, which comprises a high-temperature module refrigerant system and a low-temperature module refrigerant system; an evaporator in a high-temperature module refrigerant system and a condenser in a low-temperature module refrigerant system are arranged in parallel in the first evaporative condenser, in the low-temperature module refrigerant system, refrigerant absorbs heat in the evaporator of the first evaporative condenser, the refrigerant is changed into gas with the same temperature and pressure from a low-temperature low-pressure gas-liquid mixed state through a first gas-liquid separator, and gaseous refrigerant is compressed into high-temperature high-pressure gas in an alternating-current compressor and then enters a plate heat exchanger to release heat. Meanwhile, in the high-temperature module refrigerant system, the refrigerant brings heat from the second evaporator into the condenser of the first evaporative condenser through the second gas-liquid separator and the direct-current variable-frequency compressor respectively, and transfers the heat to water in a heat exchange manner, so that required high-temperature hot water is obtained, and the high-temperature module refrigerant system has the characteristic of being capable of efficiently operating in an ultralow-temperature environment.
Description
Technical Field
The utility model relates to an energy conversion technology field particularly, relates to a provide high-efficient direct current frequency conversion overlapping hot water unit of hot water.
Background
The performance of the air source heat pump is sharply reduced along with the reduction of the evaporation temperature, the problem of overhigh compression ratio can occur when the air source heat pump unit is used for producing high-temperature hot water in extremely low temperature, such as winter in the north of China, the air source heat pump unit is used for producing high-temperature hot water, the exhaust gas is overheated during operation, the low pressure of the system is too low, lubricating oil is deteriorated, a scroll plate is worn and the like, the air source heat pump cannot normally operate, the attenuation of the heating capacity of a common single-stage heat pump at the temperature of more than 50 ℃ can reach 50%, the energy efficiency is low, the economy is poor, and meanwhile, the use of the air source heat pump in cold regions in winter is limited.
Disclosure of Invention
The utility model discloses to prior art's not enough, provide a can be under the ultra-low temperature environment high-efficient direct current frequency conversion overlapping hot water unit of high-efficient operation.
The utility model discloses a technical goal is realized to following technical scheme.
High-efficient direct current frequency conversion cascade hot water unit, its improvement lies in: the system comprises a high-temperature module refrigerant system and a low-temperature module refrigerant system; the high-temperature module refrigerant system comprises an alternating-current compressor, a first four-way valve, a plate heat exchanger, a first liquid storage tank, a first throttling valve, a first evaporative condenser and a first gas-liquid separator; an exhaust port of the alternating-current compressor is connected with a first inlet of a first four-way valve, and a third outlet, communicated with the first inlet, of the first four-way valve is connected with an inlet of the plate heat exchanger; the outlet of the plate heat exchanger is connected with the inlet of the first liquid storage tank; the outlet of the first liquid storage tank is connected with the inlet of the first throttling valve; the outlet of the first throttling valve is connected with the inlet of the evaporator of the first evaporative condenser; the outlet of the first evaporator condenser evaporator is connected with a first inlet of a first four-way valve, and a second outlet, communicated with the first inlet, of the first four-way valve is connected with the inlet of a first gas-liquid separator; the outlet of the first gas-liquid separator is connected with the air suction port of the alternating-current compressor; the high-temperature module refrigerant system adopts a high-temperature refrigerant; the low-temperature module auxiliary heating system comprises a direct-current variable-frequency compressor, a second four-way valve, a first evaporative condenser, a second liquid storage tank, a second throttling valve, a second evaporator and a second gas-liquid separator; an exhaust port of the direct-current variable-frequency compressor is connected with a first inlet of a second four-way valve, and a third outlet, communicated with the first inlet, of the second four-way valve is connected with an inlet of a condenser of the first evaporative condenser; the outlet of the condenser of the first evaporative condenser is connected with the inlet of the second liquid storage tank; the outlet of the second liquid storage tank is connected with the inlet of a second throttling valve; the outlet of the second throttling valve is connected with the inlet of a second evaporator, and the outlet of the second throttling valve is connected with the inlet of the second evaporator; an outlet of the second evaporator is connected with a first inlet of a second four-way valve, and a second outlet, communicated with the first inlet, of the second four-way valve is connected with an inlet of a second gas-liquid separator; and the outlet of the second gas-liquid separator is connected with the air suction port of the direct-current variable-frequency compressor.
Furthermore, a first high-voltage switch is arranged in the connection between the exhaust port of the alternating-current compressor and the inlet of the first four-way valve; a second outlet on the first four-way valve is connected with an inlet of the first gas-liquid separator, and a first low-pressure switch is arranged in the first low-pressure switch; a second high-voltage switch is arranged in the connection between the exhaust port of the direct-current variable-frequency compressor and the first inlet of the second four-way valve; and a second low-pressure switch is arranged in the connection between the second outlet of the second four-way valve and the inlet of the second gas-liquid separator.
Furthermore, the second evaporator is externally provided with a fan for circulating heat exchange.
Furthermore, a second pressure sensor is also arranged in the connection between the exhaust port of the direct-current variable-frequency compressor and the first inlet of the second four-way valve.
Compared with the prior art, the utility model, following positive effect has:
1. the low-temperature module auxiliary heating system can adapt to a low-temperature environment of about-25 ℃, and through the overlapping system, the compression ratio of the compressor in an extremely low-temperature environment can be improved to the maximum extent as long as the low-temperature module auxiliary heating system has a very low condensation temperature;
2. the high-temperature module refrigerant system adopts a high-temperature refrigerant with a special proportion and can prepare hot water at about 100 ℃.
3. The utility model discloses be equipped with high temperature module refrigerant system, low temperature module refrigerant system, be equipped with the evaporimeter among the high temperature module refrigerant system in parallel in the first evaporative condenser, condenser among the low temperature module refrigerant system, in low temperature module refrigerant system, the refrigerant absorbs the heat in first evaporative condenser's evaporimeter, and become the gas with the temperature with the pressure by the gas-liquid mixture attitude of low temperature low pressure through first vapour and liquid separator, gaseous state refrigerant is released the heat in getting into plate heat exchanger after compressing into the highly compressed gas of high temperature in the alternating current compressor. Meanwhile, in the high-temperature module refrigerant system, the refrigerant brings heat from the second evaporator into the condenser of the first evaporative condenser through the second gas-liquid separator and the direct-current variable-frequency compressor respectively, and transfers the heat to water in a heat exchange manner, so that high-temperature hot water at the required temperature is obtained, and the high-temperature module refrigerant system has the characteristic of high-efficiency operation in an ultralow-temperature environment.
4. A first high-pressure switch is arranged in the connection of an exhaust port of the alternating-current compressor and an inlet of the first four-way valve and used for protecting and defrosting a high-temperature module refrigerant system.
5. And a second outlet on the first four-way valve is connected with an inlet of the first gas-liquid separator, and a first low-pressure switch is arranged in the first four-way valve and used for defrosting the high-temperature module refrigerant system.
6. And a second high-voltage switch is arranged in the connection between the exhaust port of the direct-current variable-frequency compressor and the first inlet of the second four-way valve and is used for protecting and defrosting the low-temperature module refrigerant system.
7. And a second pressure sensor is also arranged in the connection of the exhaust port of the direct-current variable-frequency compressor and the first inlet of the second four-way valve and is used for controlling the pressure of the low-temperature module refrigerant system and realizing the automatic control of the unit.
Drawings
Fig. 1 is a system diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
The high-efficiency direct-current frequency conversion cascade hot water unit shown in the attached drawing comprises a high-temperature module refrigerant system and a low-temperature module refrigerant system.
The high-temperature module refrigerant system comprises an alternating-current compressor 1.1, a first four-way valve 1.3, a plate heat exchanger 1.4, a first liquid storage tank 1.5, a first throttling valve 1.7, a first evaporative condenser 1.10 and a first gas-liquid separator 1.11.
An exhaust port of the alternating-current compressor 1.1 is connected with a first inlet of a first four-way valve 1.3, and a third outlet, communicated with the first inlet, on the first four-way valve 1.3 is connected with an inlet of a plate heat exchanger 1.4; the outlet of the plate heat exchanger 1.4 is connected with the inlet of the first liquid storage tank 1.5; the outlet of the first liquid storage tank 1.5 is connected with the inlet of a first throttle valve 1.7; the outlet of the first throttle valve 1.7 is connected with the inlet of the evaporator of the first evaporative condenser 1.10; the outlet of the evaporator of the first evaporative condenser 1.10 is connected with the first inlet of a first four-way valve 1.3, and the second outlet communicated with the first inlet on the first four-way valve 1.3 is connected with the inlet of a first gas-liquid separator 1.11; the outlet of the first gas-liquid separator 1.11 is connected with the air suction port of the alternating-current compressor 1.1; the high-temperature module refrigerant system adopts a high-temperature refrigerant.
The low-temperature module auxiliary heating system comprises a direct-current variable-frequency compressor 2.1, a second four-way valve 2.4, a first evaporative condenser 1.10, a second liquid storage tank 2.9, a second throttling valve 2.10, a second evaporator 2.12 and a second gas-liquid separator 2.14.
An exhaust port of the direct-current variable-frequency compressor 2.1 is connected with a first inlet of a second four-way valve 2.4, and a third outlet, communicated with the first inlet, on the second four-way valve 2.4 is connected with a condenser inlet of a first evaporative condenser 1.10; the outlet of the condenser of the first evaporative condenser 1.10 is connected with the inlet of the second liquid storage tank 2.9; the outlet of the second liquid storage tank 2.9 is connected with the inlet of a second throttle valve 2.10; the outlet of the second throttling valve 2.10 is connected with the inlet of the second evaporator 2.12, and the outlet of the second throttling valve 2.10 is connected with the inlet of the second evaporator 2.12; an outlet of the second evaporator 2.12 is connected with a first inlet of a second four-way valve 2.4, and a second outlet, communicated with the first inlet, on the second four-way valve 2.4 is connected with an inlet of a second gas-liquid separator 2.14; the outlet of the second gas-liquid separator 2.14 is connected with the suction port of the direct current variable frequency compressor 2.1.
A first high-voltage switch 1.2 is arranged in the connection between the exhaust port of the alternating-current compressor 1.1 and the inlet of a first four-way valve 1.3; a first low-pressure switch 1.12 is arranged in the connection of the second outlet of the first four-way valve 1.3 and the inlet of the first gas-liquid separator 1.11.
The exhaust port of the direct-current variable-frequency compressor 2.1 is connected with the first inlet of the second four-way valve 2.4, and the second high-voltage switch 2.3 and the second pressure sensor 2.22 are connected in series; a second low-pressure switch 2.21 is arranged in the connection between the second outlet of the second four-way valve 2.4 and the inlet of the second gas-liquid separator 2.14.
The second evaporator 2.12 is externally provided with a fan 2.13 for circularly exchanging heat.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not exhaustive and do not limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims (4)
1. The utility model provides a high-efficient direct current frequency conversion cascade hot water unit which characterized in that: the system comprises a high-temperature module refrigerant system and a low-temperature module refrigerant system; the high-temperature module refrigerant system comprises an alternating-current compressor (1.1), a first four-way valve (1.3), a plate heat exchanger (1.4), a first liquid storage tank (1.5), a first throttling valve (1.7), a first evaporative condenser (1.10) and a first gas-liquid separator (1.11);
an exhaust port of the alternating-current compressor (1.1) is connected with a first inlet of a first four-way valve (1.3), and a third outlet, communicated with the first inlet, on the first four-way valve (1.3) is connected with an inlet of the plate heat exchanger (1.4);
the outlet of the plate heat exchanger (1.4) is connected with the inlet of the first liquid storage tank (1.5);
the outlet of the first liquid storage tank (1.5) is connected with the inlet of a first throttle valve (1.7);
the outlet of the first throttle valve (1.7) is connected with the inlet of the evaporator of the first evaporative condenser (1.10);
the outlet of the evaporator of the first evaporative condenser (1.10) is connected with the first inlet of a first four-way valve (1.3), and the second outlet of the first four-way valve (1.3) communicated with the first inlet is connected with the inlet of a first gas-liquid separator (1.11);
the outlet of the first gas-liquid separator (1.11) is connected with the air suction port of the alternating-current compressor (1.1);
the high-temperature module refrigerant system adopts a high-temperature refrigerant;
the low-temperature module auxiliary heating system comprises a direct-current variable-frequency compressor (2.1), a second four-way valve (2.4), a first evaporative condenser (1.10), a second liquid storage tank (2.9), a second throttling valve (2.10), a second evaporator (2.12) and a second gas-liquid separator (2.14);
an exhaust port of the direct-current variable-frequency compressor (2.1) is connected with a first inlet of a second four-way valve (2.4), and a third outlet, communicated with the first inlet, on the second four-way valve (2.4) is connected with a condenser inlet of a first evaporative condenser (1.10);
the outlet of the condenser of the first evaporative condenser (1.10) is connected with the inlet of the second liquid storage tank (2.9);
the outlet of the second liquid storage tank (2.9) is connected with the inlet of a second throttle valve (2.10);
the outlet of the second throttling valve (2.10) is connected with the inlet of a second evaporator (2.12), and the outlet of the second throttling valve (2.10) is connected with the inlet of the second evaporator (2.12);
an outlet of the second evaporator (2.12) is connected with a first inlet of a second four-way valve (2.4), and a second outlet, communicated with the first inlet, of the second four-way valve (2.4) is connected with an inlet of a second gas-liquid separator (2.14);
the outlet of the second gas-liquid separator (2.14) is connected with the air suction port of the direct current variable frequency compressor (2.1).
2. The high-efficiency direct-current variable-frequency cascade hot water unit as claimed in claim 1, wherein: a first high-voltage switch (1.2) is arranged in the connection between the exhaust port of the alternating-current compressor (1.1) and the inlet of the first four-way valve (1.3);
a second outlet of the first four-way valve (1.3) is connected with an inlet of the first gas-liquid separator (1.11), and a first low-pressure switch (1.12) is arranged in the first low-pressure switch;
a second high-voltage switch (2.3) is arranged in the connection between the exhaust port of the direct-current variable-frequency compressor (2.1) and the first inlet of the second four-way valve (2.4); a second low-pressure switch (2.21) is arranged in the connection between the second outlet of the second four-way valve (2.4) and the inlet of the second gas-liquid separator (2.14).
3. The high-efficiency direct-current variable-frequency cascade hot water unit as claimed in claim 1 or 2, wherein: and the second evaporator (2.12) is externally provided with a fan (2.13) for circularly exchanging heat.
4. The high-efficiency direct-current variable-frequency cascade hot water unit as claimed in claim 3, wherein: and a second pressure sensor (2.22) is also arranged in the connection of the exhaust port of the direct-current variable-frequency compressor (2.1) and the first inlet of the second four-way valve (2.4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120192005.4U CN215062958U (en) | 2021-01-23 | 2021-01-23 | High-efficiency direct-current frequency-conversion cascade hot water unit |
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| CN202120192005.4U CN215062958U (en) | 2021-01-23 | 2021-01-23 | High-efficiency direct-current frequency-conversion cascade hot water unit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114294851A (en) * | 2022-01-17 | 2022-04-08 | 山东绿泉空调科技有限公司 | Two-stage direct-current frequency conversion overlapping extremely cold unit system |
| CN114294852A (en) * | 2022-01-17 | 2022-04-08 | 山东绿泉空调科技有限公司 | Double-stage direct-current frequency conversion overlapping high-temperature hot water unit system |
-
2021
- 2021-01-23 CN CN202120192005.4U patent/CN215062958U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114294851A (en) * | 2022-01-17 | 2022-04-08 | 山东绿泉空调科技有限公司 | Two-stage direct-current frequency conversion overlapping extremely cold unit system |
| CN114294852A (en) * | 2022-01-17 | 2022-04-08 | 山东绿泉空调科技有限公司 | Double-stage direct-current frequency conversion overlapping high-temperature hot water unit system |
| CN114294851B (en) * | 2022-01-17 | 2024-03-26 | 山东绿泉空调科技有限公司 | Double-stage direct-current variable-frequency overlapping extremely-cold machine set system |
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