CN211552114U - High-temperature heat pump unit - Google Patents
High-temperature heat pump unit Download PDFInfo
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- CN211552114U CN211552114U CN202020121595.7U CN202020121595U CN211552114U CN 211552114 U CN211552114 U CN 211552114U CN 202020121595 U CN202020121595 U CN 202020121595U CN 211552114 U CN211552114 U CN 211552114U
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- 239000003507 refrigerant Substances 0.000 claims abstract description 181
- 238000001816 cooling Methods 0.000 claims abstract description 130
- 239000010687 lubricating oil Substances 0.000 claims abstract description 41
- 238000009434 installation Methods 0.000 claims abstract description 17
- 238000004891 communication Methods 0.000 claims abstract description 9
- 239000003921 oil Substances 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 description 16
- 239000002826 coolant Substances 0.000 description 4
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000010977 unit operation Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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Abstract
The utility model discloses a high temperature heat pump set, including motor, compressor, condenser, economic ware, evaporimeter, first throttling arrangement and second throttling arrangement, still include: a cooling refrigerant pipe having an inlet in communication with a condenser, an economizer, or an evaporator and an outlet in communication with the evaporator; the inlet of the cooling motor piping is communicated with the cooling refrigerant piping, and the outlet of the cooling motor piping is communicated with the installation cavity where the motor is located; the heat exchanger comprises a first heat exchange channel and a second heat exchange channel which are mutually independent, and the first heat exchange channel is connected to the cooling refrigerant piping in series; and the second heat exchange channel is connected to the lubricating oil pipe in series. The structural design of the high-temperature heat pump unit can rapidly supply the refrigerant to the motor for cooling and perform lubricating oil cooling.
Description
Technical Field
The utility model relates to a refrigeration and heating equipment technical field, more specifically say, relate to a high temperature heat pump set.
Background
The refrigerant used by the high-temperature heat pump unit can be low-pressure refrigerant, and the low-pressure refrigerant is refrigerant with the saturation temperature of more than 0 ℃ at the standard atmospheric pressure (101.325kPa) and the corresponding saturation pressure of less than 300kPa at 30 ℃. Such as: r245fa, R1233zd (E), R1224yd and the like.
The high temperature heat pump unit generally supplies cooling refrigerant by the pressure difference between a condenser and an evaporator, and performs oil supply cooling of bearings and gears and cooling of a motor. However, the high temperature heat pump unit using low pressure refrigerant has the problems that the establishment of pressure difference of each part such as condenser and evaporator is long after starting up, and the flow of cooling refrigerant supplied by the pressure is insufficient, so that the cooling of the motor and the lubricating oil in the unit is difficult.
In summary, how to rapidly supply the refrigerant to the motor for cooling and perform the cooling of the lubricating oil is a problem that needs to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a high temperature heat pump unit, which can rapidly supply refrigerant to the motor for cooling and perform cooling of lubricating oil.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides a high temperature heat pump set, includes motor, compressor, condenser, economic ware, evaporimeter, first throttling arrangement and second throttling arrangement, still includes:
a cooling refrigerant pipe having an inlet in communication with a condenser, an economizer, or an evaporator and an outlet in communication with the evaporator;
the inlet of the cooling motor piping is communicated with the cooling refrigerant piping, and the outlet of the cooling motor piping is communicated with the installation cavity where the motor is located;
the heat exchanger comprises a first heat exchange channel and a second heat exchange channel which are mutually independent, and the first heat exchange channel is connected to the cooling refrigerant piping in series;
and the second heat exchange channel is connected in series to the lubricating oil pipe, and the lubricating oil pipe is used for guiding lubricating oil in the high-temperature heat pump unit to the heat exchanger through an oil pump for heat exchange.
In the high-temperature heat pump unit, a position at which the cooling refrigerant pipe is connected to the cooling motor pipe is preferably located upstream of the heat exchanger.
Preferably, in the high-temperature heat pump unit, the cooling refrigerant pipe is connected in series to the first valve and the refrigerant pump.
Preferably, in the high-temperature heat pump unit, an inlet of the cooling refrigerant pipe is communicated with a condenser or an economizer; the high-temperature heat pump unit also comprises a bypass pipeline which is connected with the refrigerant pump in parallel, and a second valve is arranged on the bypass pipeline.
Preferably, in the high-temperature heat pump unit, the second valve is a flow regulating valve.
Preferably, in the high-temperature heat pump unit, an inlet of the cooling refrigerant pipe is communicated with a condenser or an economizer; and throttling parts are connected in series on the cooling refrigerant pipe and the cooling motor pipe, and the throttling parts on the cooling refrigerant pipe are positioned at the upstream of the heat exchanger.
Preferably, in the high-temperature heat pump unit, the throttling component is a throttling orifice plate or a throttling valve.
Preferably, in the high-temperature heat pump unit, an inlet of the cooling refrigerant pipe is communicated with a condenser or an economizer; and an opening degree regulating valve is connected in series on the cooling refrigerant distribution pipe.
Preferably, in the high-temperature heat pump unit, an inlet of the lubricating oil pipe is communicated with an oil tank of the high-temperature heat pump unit.
Preferably, the high-temperature heat pump unit further comprises a refrigerant return pipe, an inlet of the refrigerant return pipe is communicated with the installation cavity where the motor is located, an outlet of the refrigerant return pipe is communicated with the refrigerant inlet of the evaporator, and the refrigerant return pipe is connected with a third throttling device in series.
In the high-temperature heat pump unit provided by the utility model, because the cooling refrigerant piping is arranged, the refrigerant in the condenser, the economizer or the evaporator can enter the cooling refrigerant piping, and the part of the refrigerant entering the cooling refrigerant piping enters the cooling motor piping and further enters the installation cavity where the motor is located for communication, thereby realizing the cooling of the motor; and when the refrigerant in the cooling refrigerant piping flows through the first heat exchange channel of the heat exchanger, the refrigerant exchanges heat with the lubricating oil in the second heat exchange channel, and then the cooling of the lubricating oil is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of a high temperature heat pump unit according to a first embodiment of the present invention;
FIG. 2 is a schematic view of a high temperature heat pump unit according to a second embodiment of the present invention;
FIG. 3 is a schematic view of a high temperature heat pump unit according to a third embodiment of the present invention;
fig. 4 is a schematic view of a high temperature heat pump unit according to a fourth embodiment of the present invention.
In fig. 1-4:
02-second throttling device, 03 motor, 04 compressor, 05 condenser, 06 economizer, 07 first throttling device, 08 evaporator, 09 heat exchanger, 10 second valve, 11 first valve, 12 refrigerant pump, 13 cooling refrigerant pipe, 14 cooling motor pipe, 15-oil pump, 17 refrigerant return pipe, 18 lubricating oil pipe, 21 condensation pressure sensor, 22 economizer pressure sensor, 23 evaporation pressure sensor and 24 opening degree regulating valve.
Detailed Description
An object of the utility model is to provide a high temperature heat pump set, this high temperature heat pump set's structural design can be fast with the cooling that the refrigerant supplied with the motor cooling and carried out lubricating oil.
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 in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left" and "right" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the indicated position or element must have a specific orientation, be constituted in a specific orientation, and be operated, and thus, are not to be construed as limitations of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 1-4, a high temperature heat pump unit provided in an embodiment of the present invention includes a motor 03, a compressor 04, a condenser 05, an economizer 06, an evaporator 08, a first throttling device 07, and a second throttling device 02. The high-temperature heat pump unit further comprises a cooling refrigerant pipe 13, a cooling motor pipe 14, a heat exchanger 09 and a lubricating oil pipe 18. The first throttle device 07 is located in the line between the economizer 06 and the evaporator 08, and the second throttle device 02 is located in the line between the condenser 05 and the economizer 06.
Here, the inlet of the cooling refrigerant pipe 13 communicates with the condenser 05, the economizer 06, or the evaporator 08, that is, the inlet of the cooling refrigerant pipe 13 communicates with one of the condenser 05, the economizer 06, and the evaporator 08, so that the refrigerant in the condenser 05, the economizer 06, or the evaporator 08 can enter the cooling refrigerant pipe 13. The outlet of the cooling refrigerant pipe 13 communicates with the refrigerant inlet of the evaporator 08.
An inlet of the cooling motor pipe 14 communicates with the cooling refrigerant pipe 13, and an outlet of the cooling motor pipe 14 communicates with a mounting chamber in which the motor 03 is installed. That is, the refrigerant in the cooling refrigerant pipe 13 can enter the cooling motor pipe 14 and then enter the installation cavity where the motor 03 is located through the outlet of the cooling motor pipe 14, so that the refrigerant in the condenser 05, the economizer 06 or the evaporator 08 flows to the installation cavity where the motor 03 is located through the cooling refrigerant pipe 13 and the cooling motor pipe 14 in sequence, and further the motor 03 is cooled. It should be noted that the installation cavity where the motor 03 is located is an installation cavity for accommodating the motor 03, and the motor 03 is located in the installation cavity.
The heat exchanger 09 includes a first heat exchange channel and a second heat exchange channel that are independent of each other, and the first heat exchange channel is connected in series to the cooling refrigerant pipe 13. The second heat exchange channel is connected in series to the lubricating oil pipe 18, and the lubricating oil pipe 18 is used for guiding lubricating oil in the high-temperature heat pump unit to the heat exchanger 09 through the oil pump 15 for heat exchange. That is, the refrigerant in the cooling refrigerant piping 13 exchanges heat with the lubricating oil flowing through the second heat exchange channel when flowing through the first heat exchange channel, so as to cool the lubricating oil.
In the high-temperature heat pump unit provided by the utility model, because the cooling refrigerant piping 13 is arranged, the refrigerant in the condenser 05, the economizer 06 or the evaporator 08 can enter the cooling refrigerant piping 13, and the part of the refrigerant entering the cooling refrigerant piping 13 enters the cooling motor piping 14 and further enters the installation cavity where the motor 03 is located for communication, so as to realize cooling of the motor 03; when the refrigerant in the cooling refrigerant piping 13 flows through the first heat exchange channel of the heat exchanger 09, the refrigerant exchanges heat with the lubricating oil in the second heat exchange channel, and then the cooling of the lubricating oil is realized.
In a specific embodiment, the position where the cooling refrigerant piping 13 and the cooling motor piping 14 are connected is upstream of the heat exchanger 09. With the arrangement, a part of the refrigerant entering the cooling refrigerant pipe 13 enters the cooling motor pipe 14 and further enters the installation cavity where the motor 03 is located for communication, so that the cooling of the motor 03 is realized; when the other part of the refrigerant entering the cooling refrigerant piping 13 flows through the first heat exchange channel of the heat exchanger 09, the other part of the refrigerant exchanges heat with the lubricating oil in the second heat exchange channel, and then the cooling of the lubricating oil is realized.
For convenience of control, the first valve 11 may be connected in series to the cooling refrigerant pipe 13, and the first valve 11 may be opened or closed to allow the refrigerant to enter the cooling refrigerant pipe 13 or to prevent the refrigerant from entering the cooling refrigerant pipe 13. The first valve 11 may be a solenoid valve, and is not limited herein.
Furthermore, a refrigerant pump 12 is connected in series to the cooling refrigerant pipe 13, and when the differential pressure is low, the refrigerant pump 12 can be turned on to allow more refrigerant to enter the cooling refrigerant pipe 13.
In the above embodiment, when the inlet of the cooling refrigerant pipe 13 is communicated with the condenser 05 or the economizer 06, the high temperature heat pump unit further includes a bypass line connected in parallel with the refrigerant pump 12, and the bypass line is provided with the second valve 10. With this arrangement, when a pressure difference between two members connected to the inlet and the outlet of the cooling refrigerant pipe 13 (a pressure difference between the inlet and the outlet of the cooling refrigerant pipe 13) is established in the unit, that is, a pressure difference between two members connected to the inlet and the outlet of the cooling refrigerant pipe 13 is established, during normal operation of the unit, the refrigerant pump 12 and the first valve 11 may be closed, the second valve 10 may be opened to start the bypass line, and the motor 03 and the lubricating oil may be cooled by the pressure difference between the two members connected to the inlet and the outlet of the cooling refrigerant pipe 13, so as to reduce the operation cost. Of course, the operation of the refrigerant pump 12 may be stopped after the pressure difference between the two members connected to the inlet and the outlet of the cooling refrigerant pipe 13 is established without providing the bypass line, and the refrigerant may be supplied into the cooling refrigerant pipe 13 by the pressure difference between the two members connected to the inlet and the outlet of the cooling refrigerant pipe 13, and the cooling of the motor 03 and the cooling of the lubricating oil may be realized by the pressure difference between the internal flow path of the refrigerant pump 12 and the two members connected to the inlet and the outlet of the cooling refrigerant pipe 13.
The second valve 10 may be a solenoid valve, and is not limited herein.
In another embodiment, the second valve 10 may be a flow regulating valve, and the amount of refrigerant in the bypass line is regulated by the flow regulating valve to regulate the amount of refrigerant entering the cooling refrigerant pipe 13.
As shown in fig. 1 and 2, when the inlet of the cooling refrigerant pipe 13 communicates with the condenser 05 or the economizer 06, the throttle member is connected to the cooling refrigerant pipe 13 in series, and the throttle member on the cooling refrigerant pipe 13 is located upstream of the heat exchanger 09. Since the temperature of the refrigerant taken out of the condenser 05 or the economizer 06 is high, the refrigerant in the cooling refrigerant pipe 13 passes through the throttle member to flash a part of the refrigerant before entering the heat exchanger 09, thereby lowering the temperature of the cooling refrigerant. After the refrigerant liquid in the cooling motor pipe 14 enters the motor, the pressure is reduced, and the heat in the motor is absorbed through vaporization, so that the temperature of the motor is reduced.
Preferably, the throttling component may be an orifice plate or a throttle valve, which is not limited herein.
In order to facilitate recycling of the refrigerant entering the installation cavity of the motor 03, the high-temperature heat pump unit further comprises a refrigerant return pipe 17, an inlet of the refrigerant return pipe 17 is communicated with the installation cavity where the motor 03 is located, and an outlet of the refrigerant return pipe 17 is communicated with a refrigerant inlet of the evaporator 08. A third throttling device may be connected in series to the refrigerant return pipe 17 to regulate the flow rate of the refrigerant, and thus the temperature of the motor 03.
Specifically, the inlet of the lubricating oil pipe 18 is communicated with the oil tank of the high-temperature heat pump unit, and the lubricating oil pipe 18 can lead lubricating oil in the oil tank of the high-temperature heat pump unit to the heat exchanger 09 for heat exchange so as to cool the lubricating oil of the gear and the bearing.
The oil tank of the high-temperature heat pump unit can be a gear box of the high-temperature heat pump unit, the inlet of the lubricating oil pipe 18 can be communicated with the bottom of the gear box, and the outlet of the lubricating oil pipe 18 can be communicated with the top of the gear box, and is not limited herein.
As shown in fig. 1, an inlet of the cooling refrigerant pipe 13 communicates with the condenser 05, the first valve 11 and the refrigerant pump 12 are opened after the start of the engine, the refrigerant liquid is pumped into the cooling refrigerant pipe 13 by the refrigerant pump 12, and the refrigerant liquid in the cooling refrigerant pipe 13 enters the installation cavity of the motor 03 and the heat exchanger 09 to cool the motor 03 and the lubricating oil. After the unit operates stably, after the pressure difference between the evaporator 08 and the condenser 05 in the unit is established, the second valve 10 is opened, the first valve 11 and the refrigerant pump 12 are closed, and refrigerant liquid enters the cooling refrigerant piping 13 by means of the pressure difference of the unit, so that the motor 03 and lubricating oil are cooled. In addition, since the temperature of the refrigerant taken out of the condenser 05 is high, it is necessary to flash a part of the refrigerant before the refrigerant liquid enters the motor 03 and the heat exchanger 09 to lower the temperature of the cooling refrigerant.
As shown in fig. 2, an inlet of the cooling refrigerant pipe 13 communicates with the economizer 06, and after the start of the engine, the first valve 11 and the refrigerant pump 12 are opened, the refrigerant liquid is pumped into the cooling refrigerant pipe 13 by the refrigerant pump 12, and the refrigerant liquid in the cooling refrigerant pipe 13 enters the installation cavity of the motor 03 and the heat exchanger 09 to cool the motor 03 and the lubricating oil. After the unit operates stably, after the pressure difference between the evaporator 08 and the economizer 06 in the unit is established, the second valve 10 is opened, the first valve 11 and the refrigerant pump 12 are closed, and refrigerant liquid enters the cooling refrigerant piping 13 by the pressure difference of the unit to cool the motor 03 and the lubricating oil. In addition, since the economizer 06 takes out a relatively high temperature refrigerant, it is necessary to flash a portion of the refrigerant before the refrigerant liquid enters the motor 03 and the heat exchanger 09 to lower the cooling refrigerant temperature. Since the refrigerant liquid flowing out of the economizer 06 is at a lower temperature than the refrigerant liquid flowing out of the condenser 05, the refrigerant liquid is taken out of the economizer 06 more efficiently than the refrigerant liquid is taken out of the condenser 05.
As shown in fig. 3, an inlet of the cooling refrigerant pipe 13 communicates with the evaporator 08, the first valve 11 and the refrigerant pump 12 are opened after the engine is turned on, the refrigerant fluid is pumped into the cooling refrigerant pipe 13 by the refrigerant pump 12, and the refrigerant fluid in the cooling refrigerant pipe 13 enters the installation cavity of the motor 03 and the heat exchanger 09 to cool the motor 03 and the lubricating oil. The pressure in the evaporator 08 is equivalent to the pressure in the motor 03 in the running process of the unit, and the cooling medium can not be supplied at all by depending on the pressure difference between the evaporator and the motor. The first valve 11 and the coolant pump 12 are therefore always open during operation of the unit when liquid is taken from the evaporator 08.
When the inlet of the cooling refrigerant pipe 13 communicates with the economizer 06 or the condenser 05, an opening degree adjusting valve 24 may be connected in series to the cooling refrigerant pipe 13 to control the flow rate of the refrigerant by the opening degree adjusting valve 24. As shown in fig. 4, when the inlet of the cooling refrigerant pipe 13 communicates with the economizer 06 or the condenser 05, the opening degree adjusting valve 24 is opened after the start of the engine, so that the opening degree adjusting valve 24 is in a fully open state, and the refrigerant liquid enters the cooling refrigerant pipe 13 by the pressure difference of the unit itself (the pressure difference between the liquid taking part and the motor) to cool the motor 03 and the lubricating oil. After the pressure difference is established, the opening degree of the opening degree regulating valve 24 is adjusted according to the pressure difference, the specified cooling agent amount is ensured, meanwhile, the excessive supply of the cooling agent can be avoided, and the unit operation cost is saved.
When the unit operates under variable load and variable working conditions, the frequency conversion control can be performed on the refrigerant pump 12 according to pressure values measured by the condensation pressure sensor 21(PC), the economizer pressure sensor 22(PJ) and the evaporation pressure sensor 23(PE), so that the purpose of regulating the cooling liquid supply amount by various loads is achieved, excessive supply of refrigerant can be avoided, and the unit operation cost is saved.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a high temperature heat pump set, includes motor (03), compressor (04), condenser (05), economic ware (06), evaporimeter (08), first throttling arrangement (07) and second throttling arrangement (02), its characterized in that still includes:
a cooling refrigerant pipe (13) having an inlet of the cooling refrigerant pipe (13) in communication with a condenser (05), an economizer (06), or an evaporator (08), and an outlet of the cooling refrigerant pipe (13) in communication with the evaporator (08);
a cooling motor piping (14), wherein an inlet of the cooling motor piping (14) is communicated with the cooling refrigerant piping (13), and an outlet of the cooling motor piping (14) is communicated with a mounting cavity where the motor (03) is located;
the heat exchanger (09) comprises a first heat exchange channel and a second heat exchange channel which are mutually independent, and the first heat exchange channel is connected to the cooling refrigerant piping (13) in series;
the second heat exchange channel is connected to the lubricating oil pipe (18) in series, and the lubricating oil pipe (18) is used for guiding lubricating oil in the high-temperature heat pump unit to the heat exchanger (09) through the oil pump (15) for heat exchange.
2. The high-temperature heat pump unit according to claim 1, wherein the cooling refrigerant piping (13) and the cooling motor piping (14) are connected at a position upstream of the heat exchanger (09).
3. The high-temperature heat pump unit according to claim 1, wherein the cooling refrigerant piping (13) is connected in series with the first valve (11) and the refrigerant pump (12).
4. The high-temperature heat pump unit according to claim 3, wherein the inlet of the cooling refrigerant piping (13) is communicated with a condenser (05) or an economizer (06); the high-temperature heat pump unit also comprises a bypass pipeline which is connected with the refrigerant pump (12) in parallel, and a second valve (10) is arranged on the bypass pipeline.
5. The high temperature heat pump unit according to claim 4, characterized in that the second valve (10) is a flow regulating valve.
6. The high-temperature heat pump unit according to claim 1, wherein the inlet of the cooling refrigerant piping (13) is communicated with a condenser (05) or an economizer (06); throttle members are connected in series to both the cooling refrigerant pipe (13) and the cooling motor pipe (14), and the throttle member on the cooling refrigerant pipe (13) is located upstream of the heat exchanger (09).
7. The high temperature heat pump set of claim 6, wherein the restriction member is a restriction orifice or a restriction valve.
8. The high-temperature heat pump unit according to claim 1, wherein the inlet of the cooling refrigerant piping (13) is communicated with a condenser (05) or an economizer (06); an opening degree adjusting valve (24) is connected in series to the cooling refrigerant pipe (13).
9. The high-temperature heat pump unit according to claim 1, characterized in that the inlet of the lubricating oil pipe (18) is communicated with an oil tank of the high-temperature heat pump unit.
10. The high-temperature heat pump unit according to any one of claims 1-9, further comprising a refrigerant return pipe (17), wherein an inlet of the refrigerant return pipe (17) is communicated with the installation cavity where the motor (03) is located, and an outlet of the refrigerant return pipe is communicated with the evaporator (08), and a third throttling device is connected to the refrigerant return pipe (17) in series.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020121595.7U CN211552114U (en) | 2020-01-19 | 2020-01-19 | High-temperature heat pump unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020121595.7U CN211552114U (en) | 2020-01-19 | 2020-01-19 | High-temperature heat pump unit |
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| CN211552114U true CN211552114U (en) | 2020-09-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116608602A (en) * | 2023-07-20 | 2023-08-18 | 荏原冷热系统（中国）有限公司 | Centrifugal unit and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116608602A (en) * | 2023-07-20 | 2023-08-18 | 荏原冷热系统（中国）有限公司 | Centrifugal unit and control method thereof |
| CN116608602B (en) * | 2023-07-20 | 2023-10-13 | 荏原冷热系统（中国）有限公司 | Centrifugal unit and control method thereof |
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