CN210718194U - Control system for widening use range of air-cooled fixed-frequency heat pump unit - Google Patents
Control system for widening use range of air-cooled fixed-frequency heat pump unit Download PDFInfo
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- CN210718194U CN210718194U CN201921433840.1U CN201921433840U CN210718194U CN 210718194 U CN210718194 U CN 210718194U CN 201921433840 U CN201921433840 U CN 201921433840U CN 210718194 U CN210718194 U CN 210718194U
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Abstract
The utility model provides a control system for widening the application range of an air-cooled fixed-frequency heat pump unit, wherein the outlet of a compressor is connected with the port A of a four-way valve, the port B of the four-way valve is sequentially connected with the ports D of an air side heat exchanger, an electronic expansion valve, a liquid storage device, a plate heat exchanger and the four-way valve through pipelines, and the port C of the four-way valve is sequentially connected with the inlets of a gas-liquid separator and the compressor through pipelines; the method is characterized in that: the pressure relief device is arranged on a pipeline I between the port A of the compressor and the port A of the four-way valve and a pipeline II between the port C of the four-way valve and the gas-liquid separator and comprises an unloading valve and a capillary tube, the inlet of the unloading valve is connected with the pipeline I, the outlet of the unloading valve is connected with one end of the capillary tube, and the other end of the capillary tube is connected with the pipeline II. The control is simple and reliable, no electric control is needed to be added, and the realization is easy. The heating application range is enlarged, and unnecessary high-voltage alarm is avoided.
Description
Technical Field
The utility model relates to a heat pump set field, concretely relates to use plate heat exchanger's air-cooled heat pump set.
Background
Along with the improvement of the life quality of people, the requirement on the comfort is higher and higher. The plate heat exchanger is popular with air-conditioning enterprises due to high heat exchange efficiency, but the plate heat exchanger has high heat exchange efficiency, and has a compact structure and small volume, as shown in fig. 1, the existing fixed-frequency module unit has an ambient temperature of 21 ℃, a high-pressure curve and a low-pressure curve when the outlet water is started at 50 ℃, and the refrigerant is R410A. When the heating is started, due to the small volume of the plate heat exchanger, the high-pressure is increased sharply, after the system operates normally, the system pressure is in a stable state, the high-pressure is reduced by about 9bar, the application range is seriously influenced, and when the ambient temperature exceeds 21 ℃, the machine cannot be started normally.
The air-cooled fixed-frequency heat pump unit using the plate heat exchanger has the advantages that the highest heating environment temperature is lower, generally about 21 ℃, high-voltage faults can be reported when the temperature exceeds the range, the heating application range is narrow, the requirements of people cannot be met, the machine has the phenomenon of high-voltage alarm, the machine is not turned on or turned off, and the power consumption is serious.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the control system for widening the application range of the air-cooled fixed-frequency heat pump unit is provided.
The purpose of the utility model is realized with the following mode:
a control system for widening the application range of an air-cooled fixed-frequency heat pump unit comprises a compressor 1, a four-way valve 2, a gas-liquid separator 3, a liquid reservoir 4, a plate heat exchanger 5, an air side heat exchanger 6 and an electronic expansion valve 7; the outlet of the compressor 1 is connected with the port A of the four-way valve 2, the port B of the four-way valve 2 is sequentially connected with the air side heat exchanger 6, the electronic expansion valve 7, the liquid storage device 4, the plate type heat exchanger 5 and the port D of the four-way valve 2 through pipelines, and the port C of the four-way valve 2 is sequentially connected with the gas-liquid separator 3 and the inlet of the compressor 1 through pipelines; set up pressure relief device on pipeline I between the A mouth of compressor 1 and cross valve 2 and pipeline II between the C mouth of cross valve 2 and vapour and liquid separator 3, pressure relief device includes unloading valve 9 and capillary 10, unloading valve 9's import and pipeline I18 are connected, and unloading valve's export is connected with the one end of capillary, and the other end and the pipeline II19 of capillary are connected.
And the pipelines connected with the inlet and the outlet of the electronic expansion valve 7 are respectively provided with a filter 8.
The unloading valve 9 is a one-way valve, when the pressure is greater than 4.1MPa, the high pressure can be released to the other side, and when the pressure is less than 4.1MPa, the unloading valve is equivalent to a stop valve and is bidirectional and non-circulating.
A high-pressure switch 11, an access hole 12 and an exhaust gas sensor 13 are also arranged between the outlet of the compressor 1 on the pipeline I and the unloading valve 9.
A suction temperature sensor 20 and a low-pressure sensor 21 are also arranged between the outlet of the capillary tube 10 and the gas-liquid separator 3 on the pipeline II.
The air side heat exchanger is a finned tube type, and a fin temperature sensor 15 and an ambient temperature sensor 14 are arranged on the air side heat exchanger 6.
And a water outlet temperature sensor 16 and a water return temperature sensor 17 are respectively arranged on a pipeline connected with a water outlet and a water return port of the plate heat exchanger 5.
The utility model has the advantages that: when the heating is started, because the plate heat exchanger has a small volume and the discharge capacity of the fixed-frequency compressor is fixed, accumulated liquid and gas of the plate heat exchanger are serious, and the high pressure is increased sharply, the control can unload the high pressure to the low pressure in time, meanwhile, the pressure is reduced under the action of a capillary tube and returns to the gas-liquid separator, the low pressure of the system is not increased obviously, the system is stable, meanwhile, redundant refrigerants are stored in the gas-liquid separator, and when the system tends to be stable, the redundant refrigerants stored in the gas-liquid separator flow to the system; the high-temperature environment heating has obvious effect, can be started easily, and can increase the environment temperature from 21 ℃ to about 28 ℃; the utility model discloses control is simple reliable, need not to increase automatically controlled control, easily realizes. The heating application range is enlarged, and unnecessary high-voltage alarm is avoided.
Drawings
Fig. 1 is a high-pressure and low-pressure curve chart when the fixed-frequency module unit is started.
Fig. 2 is a schematic structural diagram of the present invention.
Wherein 1 is a compressor, 2 is a four-way valve, 3 is a gas-liquid separator, 4 is a reservoir, 5 is a plate heat exchanger, 6 is an air-side heat exchanger, 7 is an electronic expansion valve, 8 is a filter, 9 is an unloading valve, 10 is a capillary tube, 11 is a high-pressure switch, 12 is an access port, 13 is an exhaust gas sensor, 14 is an ambient temperature sensor, 15 is a fin temperature sensor, 16 is an outlet water temperature sensor, 17 is a return water temperature sensor, 18 is a pipeline I, 19 is a pipeline II, 20 is an intake air temperature sensor, and 21 is a low-pressure sensor.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
A control system for widening the application range of an air-cooled fixed-frequency heat pump unit comprises a compressor 1, a four-way valve 2, a gas-liquid separator 3, a liquid reservoir 4, a plate heat exchanger 5, an air side heat exchanger 6 and an electronic expansion valve 7; the outlet of the compressor 1 is connected with the port A of the four-way valve 2, the port B of the four-way valve 2 is sequentially connected with the air side heat exchanger 6, the electronic expansion valve 7, the liquid storage device 4, the plate type heat exchanger 5 and the port D of the four-way valve 2 through pipelines, and the port C of the four-way valve 2 is sequentially connected with the gas-liquid separator 3 and the inlet of the compressor 1 through pipelines; the method is characterized in that: set up pressure relief device on pipeline I between the A mouth of compressor 1 and cross valve 2 and pipeline II between the C mouth of cross valve 2 and vapour and liquid separator 3, pressure relief device includes uninstallation valve and capillary, the import and the pipeline I of uninstallation valve are connected, and the export of uninstallation valve is connected with the one end of capillary, and the other end and the pipeline II of capillary are connected.
And the pipelines connected with the inlet and the outlet of the electronic expansion valve 7 are respectively provided with a filter 8.
The unloading valve is a one-way valve element and can only be communicated from the inlet to the outlet in the reverse direction. When the pressure is higher than 4.1MPa, the high-pressure can be released to the other side, and when the pressure is lower than 4.1MPa, the pressure is equivalent to a stop valve, and the two-way non-circulation is realized.
And a high-pressure switch, an access hole and an exhaust sensor are also arranged between the outlet of the compressor on the pipeline I and the unloading valve.
And an air suction temperature sensor and a low-pressure sensor are also arranged between the capillary tube and the gas-liquid separator on the pipeline II.
The air side heat exchanger is a finned tube type, and a finned temperature sensor and an ambient temperature sensor are arranged on the air side heat exchanger.
And a water outlet temperature sensor and a water return temperature sensor are respectively arranged on a pipeline connected with a water outlet and a water return port of the plate heat exchanger.
A heating cycle process: high-temperature and high-pressure gas refrigerant discharged by the compressor 1 enters the plate heat exchanger through the four-way valve, heat released by cooling of the refrigerant is used for heat supply, then enters the air side heat exchanger through the liquid reservoir and the electronic expansion valve, is absorbed and evaporated into low-temperature and low-pressure gas refrigerant in the air side heat exchanger, and enters the inlet of the compressor through the four-way valve and the gas-liquid separator to complete heating circulation.
The pressure relief device is added on a pipeline I between the compressor 1 and the port A of the four-way valve 2 and a pipeline II between the port C of the four-way valve 2 and the gas-liquid separator 3, and the mode of combining an unloading valve (4.1 MPa) and a capillary is adopted. And the electric control is not required to be added.
The unloading valve (4.1 MPa) is a one-way valve element and can only be communicated from the inlet to the outlet in the reverse direction. The pressure relief valve has the function that when the pressure is higher than 4.1MPa, the high-pressure can be relieved to the other side, and when the pressure is lower than 4.1MPa, the pressure relief valve is equivalent to a stop valve and is bidirectional and non-communicated.
The capillary tube plays a throttling role, pressure relief pressure can be changed into low-pressure through the capillary tube to enter the gas-liquid separator, the low-pressure of the system cannot be greatly increased, and stability of the system is guaranteed.
When heating starts, because plate heat exchanger volume is little, the fixed frequency compressor discharge capacity is fixed, can cause plate heat exchanger hydrops long-pending gas serious, and the high pressure sharply increases, and this control can in time be unloaded the high pressure to the low pressure, and the effect pressure through the capillary reduces simultaneously, returns in vapour and liquid separator, can not obviously increase system low pressure, and the system is more stable, deposits unnecessary refrigerant to vapour and liquid separator in the while, treats that when the system tends to the stability, the unnecessary refrigerant of depositing among the vapour and liquid separator can flow to the system.
High-environment heating, obvious effect, easy start and capacity of raising the environment temperature from 21 deg.c to 28 deg.c.
The control not only can solve the heating starting problem, but also can properly solve the high-pressure problem existing in the operation under other working conditions.
The control is simple and reliable, no electric control is needed to be added, and the control is easy to realize.
While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the general inventive concept, and it is intended to cover all such changes and modifications as fall within the true spirit and scope of the invention.
Claims (7)
1. A control system for widening the application range of an air-cooled fixed-frequency heat pump unit comprises a compressor (1), a four-way valve (2), a gas-liquid separator (3), a liquid reservoir (4), a plate heat exchanger (5), an air side heat exchanger (6) and an electronic expansion valve (7); an outlet of the compressor (1) is connected with an A port of the four-way valve (2), a B port of the four-way valve (2) is sequentially connected with an air side heat exchanger (6), an electronic expansion valve (7), a liquid storage device (4), a plate type heat exchanger (5) and a D port of the four-way valve (2) through pipelines, and a C port of the four-way valve (2) is sequentially connected with a gas-liquid separator (3) and an inlet of the compressor (1) through pipelines; the method is characterized in that: set up pressure relief device on pipeline I between the A mouth of compressor (1) and cross valve (2) and pipeline II between C mouth and gas-liquid separator (3) of cross valve (2), pressure relief device includes uninstallation valve (9) and capillary (10), the import and the pipeline I (18) of uninstallation valve (9) are connected, and the export of uninstallation valve is connected with the one end of capillary, and the other end and the pipeline II (19) of capillary are connected.
2. The control system for widening the use range of the air-cooled fixed-frequency heat pump unit according to claim 1, is characterized in that: and the pipelines connected with the inlet and the outlet of the electronic expansion valve (7) are respectively provided with a filter (8).
3. The control system for widening the use range of the air-cooled fixed-frequency heat pump unit according to claim 1, is characterized in that: the unloading valve (9) is a one-way valve, when the pressure is greater than 4.1MPa, the high-pressure can be released to the other side, and when the pressure is lower than 4.1MPa, the unloading valve is equivalent to a stop valve, and the unloading valve is bidirectional and does not flow.
4. The control system for widening the use range of the air-cooled fixed-frequency heat pump unit according to claim 1, is characterized in that: a high-pressure switch (11), an access hole (12) and an exhaust sensor (13) are also arranged between the outlet of the compressor (1) on the pipeline I and the unloading valve (9).
5. The control system for widening the use range of the air-cooled fixed-frequency heat pump unit according to claim 1, is characterized in that: and a suction temperature sensor (20) and a low-pressure sensor (21) are also arranged between the outlet of the capillary tube (10) and the gas-liquid separator (3) on the pipeline II.
6. The control system for widening the use range of the air-cooled fixed-frequency heat pump unit according to claim 1, is characterized in that: the air side heat exchanger is of a finned tube type, and a finned temperature sensor (15) and an ambient temperature sensor (14) are arranged on the air side heat exchanger (6).
7. The control system for widening the use range of the air-cooled fixed-frequency heat pump unit according to claim 1, is characterized in that: and a water outlet temperature sensor (16) and a water return temperature sensor (17) are respectively arranged on a pipeline connected with a water outlet and a water return port of the plate heat exchanger (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921433840.1U CN210718194U (en) | 2019-08-30 | 2019-08-30 | Control system for widening use range of air-cooled fixed-frequency heat pump unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921433840.1U CN210718194U (en) | 2019-08-30 | 2019-08-30 | Control system for widening use range of air-cooled fixed-frequency heat pump unit |
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| CN210718194U true CN210718194U (en) | 2020-06-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542226A (en) * | 2019-08-30 | 2019-12-06 | 郑州之铂智能科技有限公司 | Control system for widening use range of air-cooled fixed-frequency heat pump unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542226A (en) * | 2019-08-30 | 2019-12-06 | 郑州之铂智能科技有限公司 | Control system for widening use range of air-cooled fixed-frequency heat pump unit |
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Address after: Room 202, Workshop 1, No. 8 Changchun Road, High tech Industrial Development Zone, Zhengzhou City, Henan Province, 450000 Patentee after: Zhengzhou Zhibo Environmental Technology Co.,Ltd. Address before: 450001 Room 202, workshop 1, No.8, Changchun Road, high tech Industrial Development Zone, Zhengzhou City, Henan Province Patentee before: Zhengzhou Zhibo Intelligent Technology Co.,Ltd. |
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