CN114279105A - Heat recovery system, compression and condensation unit, heat pump system and heat recovery method - Google Patents
Heat recovery system, compression and condensation unit, heat pump system and heat recovery method Download PDFInfo
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- CN114279105A CN114279105A CN202111532262.9A CN202111532262A CN114279105A CN 114279105 A CN114279105 A CN 114279105A CN 202111532262 A CN202111532262 A CN 202111532262A CN 114279105 A CN114279105 A CN 114279105A
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- 238000011084 recovery Methods 0.000 title claims abstract description 209
- 230000006835 compression Effects 0.000 title claims abstract description 37
- 238000007906 compression Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000005494 condensation Effects 0.000 title claims description 11
- 238000009833 condensation Methods 0.000 title claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 332
- 238000005057 refrigeration Methods 0.000 claims abstract description 32
- 239000007788 liquid Substances 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 11
- 239000012736 aqueous medium Substances 0.000 claims description 3
- 239000003507 refrigerant Substances 0.000 abstract description 17
- 230000017525 heat dissipation Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 86
- 239000010726 refrigerant oil Substances 0.000 description 4
- 239000002609 medium Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
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Abstract
The invention provides a heat recovery system, a compression condensing unit, a heat pump system and a heat recovery method, relates to the technical field of heat pump systems, and solves the technical problems that in the prior art, high-temperature refrigeration oil is subjected to heat dissipation through a condensed refrigerant, the power of the unit is reduced, and heat loss is caused. The heat recovery system comprises a front heat recovery heat exchanger and a front water path structure, and an oil outlet pipeline of the oil separator of the compression condensing unit is connected with the front heat recovery heat exchanger. The heat recovery method comprises the following steps: if the temperature of the rear water tank does not reach the preset temperature value T1When the temperature of the front water tank does not reach the preset temperature value T, the water in the rear water tank is controlled to exchange heat with the rear heat recovery heat exchanger2When the heat exchanger is used, the water in the preposed water tank is controlled to exchange heat with the preposed heat recovery heat exchanger; when the temperature of the rear water tank does not reach the preset temperature value T3When, T3>T1And controlling the water in the rear water tank to exchange heat with the front heat recovery heat exchanger and the rear heat recovery heat exchanger in sequence.
Description
Technical Field
The invention relates to the technical field of heat pump systems, in particular to a heat recovery system, a compression and condensation unit, a heat pump system and a heat recovery method.
Background
In the application of a low-temperature compression condensing unit with a partial heat recovery system, a heat recoverer is often arranged at an exhaust port of a compressor, and heat is exchanged by utilizing the exhaust heat of the compressor in a heat exchanger mode to manufacture hot water which is supplied to each water using point.
In the application of the low-temperature compression condensing unit, the unit runs under a low-temperature working condition, the exhaust temperature of the compressor is high, the service life of devices in the compressor is shortened, and therefore the refrigeration oil is required to be used for cooling the exhaust temperature in the compressor. The refrigerant oil introduced into the compressor is discharged out of the compressor together with the refrigerant, and the refrigerant oil are separated in the oil separator. The refrigerant enters a condenser for condensation, then enters each liquid storage device for cooling, liquid is supplied to the evaporation side, and returns to the compressor after evaporation is finished, so that circulation is finished; the separated refrigeration oil enters an oil cooler for cooling, and the cooled refrigeration oil enters the compressor again for cooling the exhaust temperature of the compressor. The medium for cooling the refrigeration oil in the oil cooler is a refrigerant that is condensed by the condenser and then enters the auxiliary reservoir, and the refrigerant absorbs heat in the oil cooler and then returns to the auxiliary reservoir. In the process, the refrigeration oil with high temperature dissipates heat through the condensed refrigerant, so that the power of the unit is reduced, and the heat loss is also caused.
Disclosure of Invention
The invention aims to provide a heat recovery system, a compression condensing unit and a heat pump system, which solve the technical problems that in the prior art, high-temperature refrigeration oil is subjected to heat dissipation through a condensed refrigerant, the power of the unit is reduced, and heat loss is caused. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a heat recovery system which comprises a preposed heat recovery heat exchanger and a preposed waterway structure, wherein the preposed heat recovery heat exchanger is connected with the preposed waterway structure, the preposed heat recovery heat exchanger is arranged on a line of a compression condensing unit, an oil outlet pipeline of an oil separator of the compression condensing unit is connected with the preposed heat recovery heat exchanger, and refrigeration oil flowing to the preposed heat recovery heat exchanger from the oil outlet pipeline exchanges heat with an aqueous medium of the preposed heat recovery heat exchanger so as to be used for cooling the refrigeration oil.
Furthermore, the heat recovery system also comprises a preposed water pump and a preposed water tank, the preposed heat recovery heat exchanger is connected with the preposed water tank through the preposed waterway structure, and the preposed water pump is arranged on the preposed waterway structure.
Furthermore, the heat recovery system also comprises a rear heat recovery heat exchanger, the rear heat recovery heat exchanger is arranged on an exhaust pipeline of the oil separator of the compression condensing unit, and the rear heat recovery heat exchanger is connected with the front waterway structure so that water can flow to the rear heat recovery heat exchanger after passing through the front heat recovery heat exchanger.
Furthermore, the heat recovery system further comprises a rear heat recovery heat exchanger, a rear waterway structure, a rear water tank and a rear water pump, the rear heat recovery heat exchanger is arranged on the exhaust pipeline of the compressor of the compression and condensation unit, the rear waterway structure is connected with the rear heat recovery heat exchanger and the rear water tank, and the rear water pump is arranged on the rear waterway structure.
Furthermore, the rear water tank is connected with the front water tank of the heat recovery system through a water tank pipeline, and a valve body is arranged on the water tank pipeline.
Furthermore, the front waterway structure and the rear waterway structure are independently arranged; or the front waterway structure is connected with the rear waterway structure, the front waterway structure and the rear waterway structure are provided with a valve body, and the valve body is controlled to enable water in the rear water tank to sequentially exchange heat with the front heat recovery heat exchanger and the rear heat recovery heat exchanger.
Furthermore, the rear waterway structure comprises a rear water tank water outlet pipeline and a rear water tank water return pipeline, the prepositive waterway structure comprises a prepositive water tank water outlet pipeline and a prepositive water tank water return pipeline, a first connecting pipeline is arranged between the postpositive water tank water outlet pipeline and the prepositive water tank water outlet pipeline, the first connecting pipeline is connected with the water outlet pipeline of the prepositive water tank through a first three-way valve, a second connecting pipeline is arranged between the water outlet pipeline of the postpositive water tank and the water return pipeline of the prepositive water tank, the second connecting pipeline is connected with the water return pipeline of the preposed water tank through a three-way valve II, a valve body III is arranged on the water outlet pipeline of the postposition water tank, and the third valve body is positioned between the connection point of the first connecting pipeline and the water outlet pipeline of the postposition water tank and the connection point of the second connecting pipeline and the water outlet pipeline of the postposition water tank.
The invention provides a compression condensing unit which comprises a compressor, an oil separator and a heat recovery system, wherein a front heat recovery heat exchanger of the heat recovery system is connected with an oil outlet pipeline of the oil separator, and the oil outlet pipeline of the front heat recovery heat exchanger is directly connected with the compressor; or the compression condensing unit further comprises an oil cooler, an oil outlet pipeline of the front heat recovery heat exchanger is connected with the oil cooler, and the oil cooler is connected with the compressor.
Further, the compression condensing unit further comprises a condenser, an auxiliary liquid reservoir and a liquid reservoir, wherein the air outlet of the compressor, the oil separator, the condenser, the auxiliary liquid reservoir and the liquid reservoir are connected, and the auxiliary liquid reservoir is connected with the oil cooler.
The invention provides a heat pump system comprising the heat recovery system.
The invention provides a heat recovery method of the heat recovery system, which comprises the following steps: when the rear water tank and the front water tank of the heat recovery system are used simultaneously, if the temperature of the rear water tank does not reach the preset temperatureValue T1When the temperature of the front water tank does not reach the preset temperature value T, the water in the rear water tank is controlled to exchange heat with the rear heat recovery heat exchanger2When the heat exchanger is used, the water in the preposed water tank is controlled to exchange heat with the preposed heat recovery heat exchanger; when only the rear water tank is used and the temperature of the rear water tank does not reach the preset temperature value T3In which T is3>T1And controlling the water in the rear water tank to exchange heat with the front heat recovery heat exchanger and the rear heat recovery heat exchanger in sequence.
The invention provides a heat recovery system, which can recover heat of temperature refrigeration oil and comprises the following specific steps: the refrigeration oil flowing from the oil outlet pipeline to the front heat recovery heat exchanger exchanges heat with an aqueous medium of the front heat recovery heat exchanger to cool the refrigeration oil. The heat of refrigeration oil can be taken away to leading heat recovery heat exchanger's water promptly, forms the high water of temperature, and the high water of temperature can be used to supply the end, avoids the refrigeration oil of high temperature to dispel the heat through the refrigerant after the condensation, causes the power reduction of unit, calorific loss's the condition.
The preferred technical scheme of the invention can at least produce the following technical effects:
the heat recovery system further comprises a rear heat recovery heat exchanger, a rear waterway structure, a rear water tank and a rear water pump, the rear heat recovery heat exchanger is arranged on an exhaust pipeline of a compressor of the compression condensing unit, the rear waterway structure is connected with the rear heat recovery heat exchanger and the rear water tank, and the rear water pump is arranged on the rear waterway structure. When the unit needs to enter partial heat recovery (when high-temperature refrigerant discharged by the oil separator needs to be subjected to heat recovery), if only single high-temperature output is needed, only the rear water tank is operated, and water in the rear water tank exchanges heat with the front heat recovery heat exchanger and the rear heat recovery heat exchanger; when the unit needs to enter partial heat recovery, if two water temperatures are needed to be output, the rear water tank and the front water tank can be independently operated at the same time, the rear water tank and the rear heat recovery heat exchanger exchange heat, and the front water tank and the front heat recovery heat exchanger exchange heat.
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 the drawings without creative efforts.
FIG. 1 is a schematic diagram of the connection of a compression condensing unit according to an embodiment of the present invention;
FIG. 2 is a flow diagram when the unit needs to enter partial heat recovery and only a single high water temperature output is required;
FIG. 3 is a flow chart when the unit needs to enter partial heat recovery and two water temperature outputs are required.
Figure 1-front heat recovery heat exchanger; 2-an oil separator; 3, a front water pump; 4-a front water tank; 5-a rear heat recovery heat exchanger; 6-a rear water tank; 7-a rear water pump; 8-a water outlet pipeline of the rear water tank; 9-a water return pipeline of the rear water tank; 10-leading water tank outlet pipe; 11-a preposed water tank return pipeline; 12-a first connecting line; 13-a first three-way valve; 14-a second connecting line; 15-a second three-way valve; 16-valve body three; 17-a compressor; 18-an oil cooler; 19-a condenser; 20-an auxiliary reservoir; 21-liquid reservoir.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Example 1:
in the application of the low-temperature compression condensing unit, the exhaust temperature needs to be cooled by using the refrigeration oil in the compressor, the refrigeration oil entering the compressor is discharged out of the compressor along with the refrigerant, the refrigerant and the refrigeration oil are separated in the oil separator, the separated refrigeration oil enters the oil cooler for cooling, the cooled refrigeration oil enters the compressor again for cooling the exhaust temperature of the compressor. The medium for cooling the refrigeration oil in the oil cooler is a refrigerant that is condensed by the condenser and then enters the auxiliary reservoir, and the refrigerant absorbs heat in the oil cooler and then returns to the auxiliary reservoir. In the process, the refrigeration oil with high temperature dissipates heat through the condensed refrigerant, so that the power of the unit is reduced, and the heat loss is also caused. Based on this, the invention provides a heat recovery system, which can recover the heat of the temperature refrigeration oil, and comprises the following specific steps: the refrigeration oil heat recovery device comprises a preposed heat recovery heat exchanger 1 and a preposed water path structure, wherein the preposed heat recovery heat exchanger 1 is connected with the preposed water path structure, the preposed heat recovery heat exchanger 1 is arranged on a line of a compression condensing unit, an oil outlet pipeline of an oil separator 2 of the compression condensing unit is connected with the preposed heat recovery heat exchanger 1, and the refrigeration oil flowing to the preposed heat recovery heat exchanger 1 from the oil outlet pipeline exchanges heat with a water medium of the preposed heat recovery heat exchanger 1 so as to be used for cooling the refrigeration oil. Namely, the water of the preposed heat recovery heat exchanger 1 can take away the heat of the refrigeration oil to form water with high temperature, and the water with high temperature can be used for supplying tail end.
Specifically, the heat recovery system further comprises a front water pump 3 and a front water tank 4, the front heat recovery heat exchanger 1 is connected with the front water tank 4 through a front water path structure, and the front water pump 3 is arranged on the front water path structure. Referring to fig. 1, a front water pump 3 and a front water tank 4 are illustrated, the front water path structure includes a front water tank water outlet pipeline 10 and a front water tank water return pipeline 11, the front water tank water outlet pipeline 10 is provided with the water pump 3, and the front water tank water outlet pipeline 10 and the front water tank water return pipeline 11 are provided with valve body structures. When the temperature in the leading water tank 4 does not reach predetermined temperature value (the compression condensing unit also is in running state this moment), open leading water tank outlet pipe way 10 and the valve body structure on leading water tank return water pipeline 11, start leading water pump 3, water in the leading water tank 4 flows to leading heat recovery heat exchanger 1 through leading water tank outlet pipe way 10, in leading heat recovery heat exchanger 1, water and refrigeration oil carry out the heat exchange, water after the intensification returns to leading water tank 4 through leading water tank return water pipeline 11, when realizing the water heating, cool down the processing to the refrigeration oil.
Example 2:
different from the embodiment 1, the heat recovery system further comprises a rear heat recovery heat exchanger 5, the rear heat recovery heat exchanger 5 is arranged on the exhaust pipeline of the oil separator 2 of the compression condensing unit, and the rear heat recovery heat exchanger 5 is connected with the front waterway structure so that water can flow to the rear heat recovery heat exchanger 5 after passing through the front heat recovery heat exchanger 1. When the temperature in the leading water tank 4 does not reach predetermined temperature value (the compression condensing unit also is in running state and unit entering part heat recovery this moment), open the valve body structure on the leading waterway structure, start leading water pump 3, water in the leading water tank 4 returns to in leading water tank 4 after leading heat recovery heat exchanger 1 and rearmounted heat recovery heat exchanger 5 through leading waterway structure flows through leading heat recovery heat exchanger 1 in proper order, the water of leading heat recovery heat exchanger 1 of flowing through carries out the heat exchange with the refrigeration oil, the water of rearmounted heat recovery heat exchanger 5 of flowing through carries out the heat exchange with the refrigerant. Of course, when the unit enters partial heat recovery, the valve body of the front waterway structure can be controlled, so that the water in the front water tank 4 returns to the front water tank 4 after passing through the front heat recovery heat exchanger 1, and does not pass through the rear heat recovery heat exchanger 5.
When the unit does not enter partial heat recovery, the front water pump 3 is not started, and at the moment, the front heat recovery heat exchanger 1 and the rear heat recovery heat exchanger 5 do not need to work.
Example 3:
different from the embodiment 1, referring to fig. 1, the heat recovery system further includes a rear heat recovery heat exchanger 5, a rear water path structure, a rear water tank 6, and a rear water pump 7, the rear heat recovery heat exchanger 5 is disposed on an exhaust pipe of a compressor 17 of the compression and condensation unit, the rear water path structure connects the rear heat recovery heat exchanger 5 and the rear water tank 6, and the rear water pump 7 is disposed on the rear water path structure. Referring to fig. 1, the rear waterway structure includes a rear water tank outlet pipeline 8 and a rear water tank return pipeline 9, the rear water pump 7 is disposed on the rear water tank outlet pipeline 8, a valve body is disposed on the rear water tank outlet pipeline 8, when the temperature in the rear water tank 6 does not reach a preset temperature value (at this time, the compression and condensation unit is also in a running state and the unit enters a partial heat recovery), the valve body on the rear water tank outlet pipeline 8 is opened, the rear water pump 7 is started, the water in the rear water tank 6 flows to the rear heat recovery heat exchanger 5 through the rear water tank outlet pipeline 8, and the water returns to the rear water tank 6 through the rear water tank return pipeline 9 after exchanging heat between the rear heat recovery heat exchanger 5 and a refrigerant.
The front waterway structure and the rear waterway structure are independently arranged, namely the front waterway structure is not connected with the rear waterway structure, the water in the rear water tank 6 is subjected to heat exchange through the rear heat recovery heat exchanger 5, and the water in the front water tank 4 is subjected to heat exchange through the front heat recovery heat exchanger 1; or the front waterway structure is connected with the rear waterway structure, the valve body is arranged on the front waterway structure and the rear waterway structure, and the valve body is controlled to enable water in the rear water tank 6 to sequentially exchange heat with the front heat recovery heat exchanger 1 and the rear heat recovery heat exchanger 5. Specifically, referring to fig. 1, the rear waterway structure includes a rear tank water outlet pipeline 8 and a rear tank water return pipeline 9, the front waterway structure includes a front tank water outlet pipeline 10 and a front tank water return pipeline 11, a first connecting pipeline 12 is disposed between the rear tank water outlet pipeline 8 and the front tank water outlet pipeline 10, the first connecting pipeline 12 is connected to the front tank water outlet pipeline 10 through a first three-way valve 13, a second connecting pipeline 14 is disposed between the rear tank water outlet pipeline 8 and the front tank water return pipeline 11, the second connecting pipeline 14 is connected to the front tank water return pipeline 11 through a second three-way valve 15, a third valve body 16 is disposed on the rear tank water outlet pipeline 8, and the third valve body 16 is located between a connecting point of the first connecting pipeline 12 and the rear tank water outlet pipeline 8 and a connecting point of the second connecting pipeline 14 and the rear tank water outlet pipeline 8.
When the unit needs to enter partial heat recovery, if only single high-temperature output is needed, only the rear water tank 6 is operated at the moment, the pneumatic valve body III 16 is controlled to be closed, the three-way valve I13 is controlled to enable the port A to be closed, the port b to be communicated with the port c, and the three-way valve is controlledThe second valve 15 enables the port A to be closed, the port B to be communicated with the port C, and when the temperature of the post-positioned water tank 6 is lower than a target set value T3At the same time, the rear water pump 7 and the front water pump 3 are turned on. At this time, hot water enters the front heat recovery heat exchanger 1 from the rear water tank 6 through the first three-way valve 13, the temperature rises after preheating, enters the rear heat recovery heat exchanger 5 through the second three-way valve 15, and returns to the rear water tank 6 after the temperature rises. When the water temperature in the rear water tank 6 reaches a preset value T3In the meantime, the rear water pump 7 and the front water pump 3 are turned off, so that the front heat recovery heat exchanger 1 and the rear heat recovery heat exchanger 5 do not work first.
When the unit needs to enter partial heat recovery, if two water temperature outputs are needed, the rear water tank 6 and the front water tank 4 can be operated independently at the same time:
(1) controlling the third pneumatic valve body 16 to be opened, controlling the first three-way valve 13 to close the port C, controlling the port C of the second three-way valve 15 to be closed, and controlling the post-positioned water tank 6 to have the temperature lower than the target set value T1When the heat exchanger is used, the rear water pump 7 is turned on, hot water enters the rear heat recovery heat exchanger 5 from the rear water tank 6 through the third valve body 16, the temperature rises after heat exchange, and the hot water returns to the rear water tank 6. When the water temperature in the rear water tank 6 reaches a preset value T1In the meantime, the rear water pump 7 is turned off, so that the rear heat recovery heat exchanger 5 does not work first.
(2) Controlling a first three-way valve 13 to close the port C and communicate the port B with the port a, controlling a second three-way valve 15 to communicate the port C and the port B with the port A, and controlling the temperature of the front water tank 4 to be lower than a target set value T2When the heat exchanger is used, the front water pump 3 is turned on, hot water enters the front heat recovery heat exchanger 1 from the front water tank 4 at the moment, the temperature rises after heat exchange, and then the hot water returns to the front water tank 4. The water temperature in the front water tank 4 reaches a preset value T2In the meantime, the front water pump 3 is turned off, so that the front heat recovery heat exchanger 1 does not work first.
When the unit does not enter partial heat recovery, the rear water pump 7 and the front water pump 3 are not started, and at the moment, the front heat recovery heat exchanger 1 and the rear heat recovery heat exchanger 5 do not need to work.
The rear water tank 6 is connected with the front water tank 4 of the heat recovery system through a water tank pipeline, and a valve body is arranged on the water tank pipeline. Referring to fig. 1, the rear water tank 6 and the front water tank 4 are connected by a pipe, and a valve body is arranged on the pipe.
Example 4:
the invention provides a compression condensing unit, which comprises a compressor 17, an oil separator 2 and a heat recovery system described in embodiment 3, wherein a preposed heat recovery heat exchanger 1 of the heat recovery system is connected with an oil outlet pipeline of the oil separator 2, and the oil outlet pipeline of the preposed heat recovery heat exchanger 1 is directly connected with the compressor 17; or, the compression condensing unit further comprises an oil cooler 18, the oil outlet pipeline of the preposed heat recovery heat exchanger 1 is connected with the oil cooler 18, and the oil cooler 18 is connected with the compressor 17. The heat recovery system further comprises a rear heat recovery heat exchanger 5, a rear water path structure, a rear water tank 6 and a rear water pump 7, the rear heat recovery heat exchanger 5 is arranged on an exhaust pipeline of a compressor 17 of the compression and condensation unit, the rear heat recovery heat exchanger 5 is arranged between the oil separator 2 and the condenser 19, the rear water path structure is connected with the rear heat recovery heat exchanger 5 and the rear water tank 6, and the rear water pump 7 is arranged on the rear water path structure. Referring to fig. 1, there is shown a condenser 19, an auxiliary reservoir 20 and a reservoir 21, the discharge port of the compressor 17, the oil separator 2, the condenser 19, the auxiliary reservoir 20 and the reservoir 21 being connected, the auxiliary reservoir 20 being connected to the oil cooler 18.
Referring to fig. 1, an oil cooler 18 is illustrated, preferably, an oil outlet pipeline of the front heat recovery heat exchanger 1 is connected to the oil cooler 18, and when the temperature of the front water tank 4 has reached a preset value and the temperature of the refrigeration oil still needs to be reduced, at this time, the valve bodies on the front water path structure are closed (the valve bodies on the front water tank water outlet pipeline 10 and the front water tank water return pipeline 11 are closed), so that water in the front water tank 4 does not flow into the front heat recovery heat exchanger 1. The refrigerant oil discharged from the oil outlet line of the oil cooler 18 passes through the oil cooler 18 and then returns to the compressor 17, and the refrigerant in the auxiliary receiver 20 passes through the oil cooler 18 and then takes away the heat of the refrigerant oil and then returns to the auxiliary receiver 20, and after returning to the auxiliary receiver, it further returns to the condenser to be cooled. However, this scheme is not essential to the protection of the present invention and is not described in detail.
Example 5:
the invention provides a heat pump system, which comprises a compression condensing unit provided by embodiment 4. The compression condensing unit comprises a compressor 17, an oil separator 2, a condenser 19, an auxiliary liquid reservoir 20, a liquid reservoir 21 and the heat recovery system described in embodiment 3, wherein a preposed heat recovery heat exchanger 1 of the heat recovery system is connected with an oil outlet pipeline of the oil separator 2, and the oil outlet pipeline of the preposed heat recovery heat exchanger 1 is directly connected with the compressor 17; or, the compression condensing unit further comprises an oil cooler 18, the oil outlet pipeline of the preposed heat recovery heat exchanger 1 is connected with the oil cooler 18, and the oil cooler 18 is connected with the compressor 17. The heat recovery system further comprises a rear heat recovery heat exchanger 5, a rear water path structure, a rear water tank 6 and a rear water pump 7, the rear heat recovery heat exchanger 5 is arranged on an exhaust pipeline of a compressor 17 of the compression and condensation unit, the rear heat recovery heat exchanger 5 is arranged between the oil separator 2 and the condenser 19, the rear water path structure is connected with the rear heat recovery heat exchanger 5 and the rear water tank 6, and the rear water pump 7 is arranged on the rear water path structure.
Example 6:
the invention provides a heat recovery method of a heat recovery system, which comprises the following steps: when the rear water tank 6 and the front water tank 4 of the heat recovery system are used simultaneously, if the temperature of the rear water tank 6 does not reach the preset temperature value T1When the temperature of the front water tank 4 does not reach the preset temperature value T, the water in the rear water tank 6 is controlled to exchange heat with the rear heat recovery heat exchanger 52When the heat exchanger is used, the water in the preposed water tank 4 is controlled to exchange heat with the preposed heat recovery heat exchanger 1; when only the rear water tank 6 is used and the temperature of the rear water tank 6 does not reach the preset temperature value T3In which T is3>T1And controlling the water in the rear water tank 6 to exchange heat with the front heat recovery heat exchanger 1 and the rear heat recovery heat exchanger 5 in sequence.
When the unit needs to enter partial heat recovery, if only single high-temperature output is needed, only the rear water tank 6 is operated at the moment, the pneumatic valve body III 16 is controlled to be closed, the three-way valve I13 is controlled to enable the port A to be closed, the port B to be communicated with the port C, the three-way valve II 15 is controlled to enable the port A to be closed, the port B to be communicated with the port C, and when the temperature of the rear water tank 6 is lower than the target set temperatureConstant value T3When the water heater is used, the rear water pump 7 and the front water pump 3 are simultaneously opened, at the moment, hot water enters the front heat recovery heat exchanger 1 from the rear water tank 6 through the first three-way valve 13, rises in temperature after preheating, enters the rear heat recovery heat exchanger 5 through the second three-way valve 15, and returns to the rear water tank 6 after heating. When the water temperature in the rear water tank 6 reaches a preset value T3In the meantime, the rear water pump 7 and the front water pump 3 are turned off, so that the front heat recovery heat exchanger 1 and the rear heat recovery heat exchanger 5 do not work first.
When the unit needs to enter partial heat recovery, if two water temperature outputs are needed, the rear water tank 6 and the front water tank 4 can be operated independently at the same time:
(1) controlling the third pneumatic valve body 16 to be opened, controlling the first three-way valve 13 to close the port C, controlling the port C of the second three-way valve 15 to be closed, and controlling the post-positioned water tank 6 to have the temperature lower than the target set value T1When the heat exchanger is used, the rear water pump 7 is turned on, hot water enters the rear heat recovery heat exchanger 5 from the rear water tank 6 through the third valve body 16, the temperature rises after heat exchange, and the hot water returns to the rear water tank 6. When the water temperature in the rear water tank 6 reaches a preset value T1In the meantime, the rear water pump 7 is turned off, so that the rear heat recovery heat exchanger 5 does not work first.
(2) Controlling a first three-way valve 13 to close the port C and communicate the port B with the port a, controlling a second three-way valve 15 to communicate the port C and the port B with the port A, and controlling the temperature of the front water tank 4 to be lower than a target set value T2When the heat exchanger is used, the front water pump 3 is turned on, hot water enters the front heat recovery heat exchanger 1 from the front water tank 4 at the moment, the temperature rises after heat exchange, and then the hot water returns to the front water tank 4. The water temperature in the front water tank 4 reaches a preset value T2In the meantime, the front water pump 3 is turned off, so that the front heat recovery heat exchanger 1 does not work first.
When the unit does not enter partial heat recovery, the rear water pump 7 and the front water pump 3 are not started, and at the moment, the front heat recovery heat exchanger 1 and the rear heat recovery heat exchanger 5 do not need to work.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (11)
1. A heat recovery system is characterized by comprising a preposed heat recovery heat exchanger (1) and a preposed waterway structure, wherein,
the pre-heat recovery heat exchanger (1) is connected with the pre-water path structure, the pre-heat recovery heat exchanger (1) is arranged on a line of a compression condensing unit, an oil outlet pipeline of an oil separator (2) of the compression condensing unit is connected with the pre-heat recovery heat exchanger (1), and refrigeration oil flowing to the pre-heat recovery heat exchanger (1) from the oil outlet pipeline exchanges heat with an aqueous medium of the pre-heat recovery heat exchanger (1) so as to be used for cooling the refrigeration oil.
2. A heat recovery system according to claim 1, further comprising a front water pump (3) and a front water tank (4), the front heat recovery heat exchanger (1) being connected to the front water tank (4) by the front waterway structure, the front water pump (3) being arranged on the front waterway structure.
3. The heat recovery system according to claim 1 or 2, further comprising a rear heat recovery heat exchanger (5), wherein the rear heat recovery heat exchanger (5) is arranged on the exhaust pipeline of the compressor-condenser unit oil separator (2), and the rear heat recovery heat exchanger (5) is connected with the front waterway structure so that water can flow to the rear heat recovery heat exchanger (5) after passing through the front heat recovery heat exchanger (1).
4. The heat recovery system according to claim 1 or 2, further comprising a post-heat recovery heat exchanger (5), a post-waterway structure, a post-water tank (6) and a post-water pump (7), wherein the post-heat recovery heat exchanger (5) is arranged on an exhaust pipeline of the compressor (17), the post-waterway structure is connected with the post-heat recovery heat exchanger (5) and the post-water tank (6), and the post-water pump (7) is arranged on the post-waterway structure.
5. A heat recovery system according to claim 4, characterized in that the post-tank (6) is connected to the pre-tank (4) of the heat recovery system by a tank line, and a valve is arranged on the tank line.
6. The heat recovery system of claim 4, wherein the forward waterway structure is independently disposed from the rearward waterway structure; or the front waterway structure is connected with the rear waterway structure, the front waterway structure and the rear waterway structure are provided with valves, and the valves are controlled to enable water in the rear water tank (6) to sequentially exchange heat with the front heat recovery heat exchanger (1) and the rear heat recovery heat exchanger (5).
7. The heat recovery system according to claim 6, wherein the post-waterway structure comprises a post-tank water outlet pipeline (8) and a post-tank water return pipeline (9), the pre-waterway structure comprises a pre-tank water outlet pipeline (10) and a pre-tank water return pipeline (11), a first connecting pipeline (12) is arranged between the post-tank water outlet pipeline (8) and the pre-tank water outlet pipeline (10), the first connecting pipeline (12) is connected with the pre-tank water outlet pipeline (10) through a first three-way valve (13), a second connecting pipeline (14) is arranged between the post-tank water outlet pipeline (8) and the pre-tank water return pipeline (11), the second connecting pipeline (14) is connected with the pre-tank water return pipeline (11) through a second three-way valve (15), and a third valve body (16) is arranged on the post-tank water outlet pipeline (8), the third valve body (16) is positioned between the connection point of the first connecting pipeline (12) and the water outlet pipeline (8) of the rear water tank and the connection point of the second connecting pipeline (14) and the water outlet pipeline (8) of the rear water tank.
8. A compression condensing unit, characterized by comprising a compressor (17), an oil separator (2) and a heat recovery system according to any one of claims 1 to 7, wherein the front heat recovery heat exchanger (1) of the heat recovery system is connected with the oil outlet pipeline of the oil separator (2), and the oil outlet pipeline of the front heat recovery heat exchanger (1) is directly connected with the compressor (17); or the compression condensing unit further comprises an oil cooler (18), an oil outlet pipeline of the preposed heat recovery heat exchanger (1) is connected with the oil cooler (18), and the oil cooler (18) is connected with the compressor (17).
9. The set of compression and condensation units according to claim 8, characterised in that it further comprises a condenser (19), an auxiliary liquid reservoir (20) and a liquid reservoir (21), the discharge of the compressor (17), the oil separator (2), the condenser (19), the auxiliary liquid reservoir (20) and the liquid reservoir (21) being connected, the auxiliary liquid reservoir (20) being connected with the oil cooler (18).
10. A heat pump system comprising the heat recovery system of any one of claims 1-7.
11. A heat recovery method of a heat recovery system according to claims 4-7, characterized in that the heat recovery method comprises the following:
when the rear water tank (6) and the front water tank (4) of the heat recovery system are used simultaneously, if the temperature of the rear water tank (6) does not reach the preset temperature value T1During the process, the water in the rear water tank (6) is controlled to exchange heat with the rear heat recovery heat exchanger (5), and if the temperature of the front water tank (4) does not reach a preset temperature value T2When the heat exchanger is used, the water in the preposed water tank (4) is controlled to exchange heat with the preposed heat recovery heat exchanger (1);
when only the rear water tank (6) is used and the temperature of the rear water tank (6) does not reach the preset temperature value T3In which T is3>T1Controlling the water in the rear water tank (6) to sequentially react with the front heat recovery heat exchanger (1) and the rear heat recovery heat exchangerThe heat collecting and exchanging device (5) exchanges heat.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111532262.9A CN114279105A (en) | 2021-12-15 | 2021-12-15 | Heat recovery system, compression and condensation unit, heat pump system and heat recovery method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111532262.9A CN114279105A (en) | 2021-12-15 | 2021-12-15 | Heat recovery system, compression and condensation unit, heat pump system and heat recovery method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102454581A (en) * | 2010-10-19 | 2012-05-16 | 三浦工业株式会社 | Heat recovery system |
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| JP5563176B1 (en) * | 2013-10-31 | 2014-07-30 | 中国電力株式会社 | Engine exhaust heat recovery device |
| US20180320927A1 (en) * | 2013-01-28 | 2018-11-08 | Hitachi Industrial Equipment Systems Co., Ltd. | Waste-Heat Recovery System in Oil-Cooled Gas Compressor |
| CN213807999U (en) * | 2020-09-16 | 2021-07-27 | 深圳市山本光电股份有限公司 | Waste heat recovery system of air compressor |
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2021
- 2021-12-15 CN CN202111532262.9A patent/CN114279105A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102454581A (en) * | 2010-10-19 | 2012-05-16 | 三浦工业株式会社 | Heat recovery system |
| US20180320927A1 (en) * | 2013-01-28 | 2018-11-08 | Hitachi Industrial Equipment Systems Co., Ltd. | Waste-Heat Recovery System in Oil-Cooled Gas Compressor |
| JP5563176B1 (en) * | 2013-10-31 | 2014-07-30 | 中国電力株式会社 | Engine exhaust heat recovery device |
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Application publication date: 20220405 |