CN210569335U - Cold and heat combined supply control system adopting high-temperature heat pump - Google Patents
Cold and heat combined supply control system adopting high-temperature heat pump Download PDFInfo
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- CN210569335U CN210569335U CN201920864271.XU CN201920864271U CN210569335U CN 210569335 U CN210569335 U CN 210569335U CN 201920864271 U CN201920864271 U CN 201920864271U CN 210569335 U CN210569335 U CN 210569335U
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Abstract
The utility model discloses an adopt high temperature heat pump's cold and hot confession control system that allies oneself with, include: the system comprises a high-temperature heat pump unit, a condenser, a heat recovery heat exchanger, a reversing device I, a reversing device II, a refrigeration house, a gas-liquid separator and a refrigeration house compressor; one side of the high-temperature heat pump unit is connected with a hot water pipeline through a condenser, and the other side of the high-temperature heat pump unit is connected with a circulating pipeline through a heat recovery heat exchanger; the heat recovery heat exchanger is connected with the first reversing device, the second reversing device, the refrigeration house, the gas-liquid separator and the refrigeration house compressor through the circulating pipeline in sequence to form a circulating loop. The utility model discloses not only realize the various running state of cold and hot confession of ally oneself with, reach energy-conserving and the purpose that improves the energy utilization moreover.
Description
Technical Field
The utility model belongs to the technical field of the high temperature heat pump, more specifically the cold and hot confession control system that allies oneself with that says so relates to an adopt high temperature heat pump.
Background
The industrial production is also provided with a process flow of using hot water and cold water, for example, the process flow needs cold storage in a cold storage house and high-temperature hot water for dehairing and is used for a production line in slaughtering enterprises. The heat discharged by a conventional refrigeration house is wasted, and hot water needs to be prepared by a boiler, so that a large amount of energy is wasted; with the banning of coal-fired boilers, the fuel cost rises sharply and the operation cost of enterprises increases.
Therefore, how to provide a combined cooling and heating control system using a high-temperature heat pump becomes a problem that needs to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides an adopt cold and hot confession control system that allies oneself with of high temperature heat pump not only realizes cold and hot various running state that allies oneself with the confession, reaches energy-conserving and the purpose that improves energy utilization moreover.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a combined cooling and heating control system using a high-temperature heat pump comprises: the system comprises a high-temperature heat pump unit, a condenser, a heat recovery heat exchanger, a reversing device I, a reversing device II, a refrigeration house, a gas-liquid separator and a refrigeration house compressor; one side of the high-temperature heat pump unit is connected with a hot water pipeline through the condenser, and the other side of the high-temperature heat pump unit is connected with a circulating pipeline through the heat recovery heat exchanger; the heat recovery heat exchanger is connected with the first reversing device, the second reversing device, the refrigeration house, the gas-liquid separator and the refrigeration house compressor through a circulating pipeline in sequence to form a circulating loop.
Preferably, an oil separator is arranged on a pipeline communicated with the heat recovery heat exchanger and the refrigeration house compressor. Lubricating oil in high-pressure steam discharged by the refrigeration house compressor can be separated through the oil separator, so that the safe and efficient operation of the device is ensured.
Preferably, a hot water circulating pump is arranged on the hot water pipeline. The hot water circulating pump can provide hot water circulating power, and the cold and heat exchange efficiency is ensured.
Preferably, three connecting pipelines are arranged between the first reversing device and the second reversing device, namely a first connecting pipeline, a second connecting pipeline and a third connecting pipeline, and a high-pressure liquid reservoir, an electromagnetic valve and a throttle valve are sequentially arranged on the first connecting pipeline from the first reversing device to the second reversing device; and an evaporative condenser is arranged on the third connecting pipeline.
Preferably, when cold and hot confession mode of operation that allies oneself with, switching-over device one with switching-over device two is closed, and high temperature high pressure gaseous state refrigerant through the freezer compressor compression flows in the heat recovery heat exchanger, the heat absorption of work substance among the high temperature heat pump set, the refrigerant cooling, heat release back refrigerant warp switching-over device one flows in through connecting line one switching-over device two, warp in proper order again the freezer vapour and liquid separator gets into the freezer compressor, so constantly circulate, reach the purpose of refrigeration and heating simultaneously.
Preferably, when heating for the master mode operation, switching-over device one is closed, switching-over device two is opened, the warp the high temperature high pressure gaseous state refrigerant of freezer compressor compression flows in the heat recovery heat exchanger, refrigerant cooling when working medium endotherm in the high temperature heat pump set, through the refrigerant warp after giving out heat switching-over device one flows in through connecting line one after the switching-over device two, flows back through connecting line three flow to switching-over device one, flows in through connecting line two again switching-over device two, then passes through in proper order the freezer vapour and liquid separator gets into the freezer compressor, so constantly circulate, reach under the less cold load state, prepare the purpose of hot water.
Preferably, when refrigeration is the master mode operation, switching-over device one with switching-over device two is opened, the warp the high temperature high pressure gaseous state refrigerant of freezer compressor compression flows in the heat recovery heat exchanger, refrigerant cooling when working medium endotherm in the high temperature heat pump set, through the refrigerant warp after giving out heat switching-over device one flows in through connecting line three switching-over device two back, flows back through connecting line two switching-over device one, flows in through connecting line one again switching-over device two, then passes through in proper order the freezer vapour and liquid separator gets into the freezer compressor, so constantly circulate, reach under the less heat load state, freezer normal operating's purpose.
Preferably, a hot end inlet thermometer is arranged at the inlet of the hot water pipeline, and a hot end outlet thermometer and a hot end outlet flowmeter are arranged at the outlet of the hot water pipeline. The temperature of the hot water pipeline before and after the high-temperature heat pump unit can be collected through the hot end inlet thermometer and the hot end outlet thermometer, and the water flow in the hot water pipeline can be collected through the hot end outlet flowmeter.
Preferably, the freezer entry is provided with freezer entry thermometer and freezer entry flowmeter, the freezer export is provided with freezer export thermometer. The temperature acquisition of the inlet and outlet of the refrigeration house can be realized through the refrigeration house inlet thermometer and the refrigeration house outlet thermometer, and the acquisition of the flow of the refrigerant can be realized through the refrigeration house inlet flowmeter.
Preferably, the outlet temperature of the hot water pipeline is 60-65 ℃, and the refrigerating temperature of the refrigerator is-32 to-18 ℃ so as to meet the requirements of users on hot water and refrigerating temperature.
The beneficial effects of the utility model reside in that:
the utility model discloses simple structure, convenient to use, through switching-over device one and switching-over device two switch and closed two kinds of states, can change the refrigerant circulation direction in the system to the state of control system operation. Further realizing various running states of combined cooling and heating supply. In the whole circulation process of the system, the high-temperature heat pump unit consumes a small amount of electric energy by utilizing the higher COP value, absorbs heat from the condensation heat extraction of the refrigeration house, and is converted into high-temperature hot water by the high-temperature heat pump unit, so that the energy consumption is reduced, and the purposes of saving energy and improving the energy utilization are achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be 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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.
Fig. 3 is a schematic structural diagram of embodiment 3 of the present invention.
Fig. 4 is a schematic diagram of the circuit control of the present invention.
Wherein, in the figure,
1-high temperature heat pump unit; 2-a condenser; 3-a heat recovery heat exchanger; 4-a first reversing device; 5-a second reversing device; 6-a refrigeration house; 7-gas-liquid separator; 8-a freezer compressor; 9-hot water pipeline; 10-a circulation line; 11-an oil separator; 12-hot water circulation pump; 13-connecting the first pipeline; 14-connecting a second pipeline; 15-connecting a pipeline III; 16-a high pressure reservoir; 17-a solenoid valve; 18-a throttle valve; 19-an evaporative condenser; 20-hot end inlet thermometer; 21-hot end outlet thermometer; 22-hot end outlet flow meter; 23-refrigerator inlet thermometer; 24-freezer inlet flow meter; 25-refrigerator outlet thermometer; 26-controller.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments 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.
Referring to fig. 1-4, the present invention provides a combined cooling and heating control system using a high temperature heat pump, comprising: the system comprises a high-temperature heat pump unit 1, a condenser 2, a heat recovery heat exchanger 3, a reversing device I4, a reversing device II 5, a refrigeration house 6, a gas-liquid separator 7 and a refrigeration house compressor 8; one side of the high-temperature heat pump unit 1 is connected with a hot water pipeline 9 through a condenser 2, and the other side is connected with a circulating pipeline 10 through a heat recovery heat exchanger 3; the heat recovery heat exchanger 3 is connected with a reversing device I4, a reversing device II 5, a refrigeration house 6, a gas-liquid separator 7 and a refrigeration house compressor 8 sequentially through a circulating pipeline 10 to form a circulating loop.
In another embodiment, an oil separator 11 is arranged on a pipeline of the refrigeration house compressor 8 communicated with the heat recovery heat exchanger 3. The lubricating oil in the high-pressure steam discharged by the refrigeration house compressor 8 can be separated through the oil separator 11, so that the device can be safely and efficiently operated.
In another embodiment, a hot water circulation pump 12 is arranged on the hot water line 9. The hot water circulating pump 12 can provide hot water circulating power, and the cold and heat exchange efficiency is ensured.
In another embodiment, three connecting pipelines are arranged between the first reversing device 4 and the second reversing device 5, namely a connecting pipeline I13, a connecting pipeline II 14 and a connecting pipeline III 15, and a high-pressure liquid reservoir 16, an electromagnetic valve 17 and a throttle valve 18 are sequentially arranged on the connecting pipeline I13 from the first reversing device 4 to the second reversing device 5; an evaporative condenser 19 is arranged on the third connecting pipeline 15.
In the process of combined cooling and heating operation, the refrigeration load and the heating load are not always matched, and the power and the operation mode of the system need to be adjusted according to the production condition. The matching degree of cooling and heating can be judged by comparing the cold load and the heat load, so that the working state of the system can be divided into three states of mainly heating, mainly cooling and simultaneously heating.
Referring to FIG. 1, in combined cooling and heating mode of operation, QHeat generation＝QColdAnd cooling and heating are simultaneously carried out. The first reversing device 4 and the second reversing device 5 are closed, high-temperature high-pressure gaseous refrigerant compressed by the refrigeration house compressor 8 flows into the heat recovery heat exchanger 3 through the oil separator 2, the working medium in the high-temperature heat pump unit 1 absorbs heat, the refrigerant is cooled, the refrigerant after heat release flows into the throttle valve 18 through the first connecting pipeline 13 through the valve B of the first reversing device 4, the gas-liquid mixed refrigerant in a low-pressure low-temperature state after adiabatic expansion flows into the refrigeration house 6 through the valve B of the second reversing device 5, the low-temperature low-pressure refrigerant absorbs heat in the refrigeration house 6, and the low-temperature low-pressure gaseous refrigerant after heat absorption enters the refrigeration house compressor 8 through the gas-liquid separator 7, so that continuous circulation is realized.
Referring to FIG. 2, when heating is in the main mode, QHeat generation＞QColdThe first reversing device 4 is closed, the second reversing device 5 is opened, and the evaporative condenser 19 discharges cold energy to outdoor air, so that the hot water circulating pump 12 outputs hot water. The high-temperature high-pressure gaseous refrigerant compressed by the cold storage compressor 8 flows into the heat recovery heat exchanger 3 through the oil separator 2, the refrigerant is cooled while the working medium in the high-temperature heat pump unit 1 absorbs heat, the heat-released refrigerant flows into the throttle valve 18 through the valve B of the reversing device I4 through the connecting pipeline I13, the gas-liquid mixed refrigerant in the low-pressure low-temperature state after adiabatic expansion flows into the evaporative condenser 19 through the valve A of the reversing device II 5 to absorb heat from outdoor air for evaporation, the heat-absorbed low-temperature low-pressure gas-liquid mixed refrigerant flows into the cold storage 6 through the valve C of the reversing device I4 and the valve D of the reversing device II 5, and the evaporated low-temperature low-pressure gaseous refrigerant enters the cold storage compressor 8 through the gas-liquid separator 7 and circulates continuously in such a way, and the purpose of preparing hot.
Referring to FIG. 3, when refrigeration is in primary mode, QHeat generation＜QColdThe first reversing device 4 and the second reversing device 5 are opened, the requirement of system hot water is small, the effect of a heat recovery part is small, the evaporative condenser 19 and the high-temperature heat pump unit 1 are connected in series mainly through the first reversing device 4 and the second reversing device 5, and refrigerant heat exhaust is discharged from the evaporative condenser 19 and the heat recovery heat exchanger 3 to keep the normal operation of the refrigeration house 6. The high-temperature high-pressure gaseous refrigerant compressed by the cold storage compressor 8 flows into the heat recovery heat exchanger 3 through the oil separator 2, the refrigerant is cooled while the working medium in the high-temperature heat pump unit 1 absorbs heat, the refrigerant after heat release flows into the evaporative condenser 19 through the valve A of the reversing device I4, the refrigerant after heat release is cooled continuously to form high-pressure liquid refrigerant, then the high-pressure liquid refrigerant flows into the throttling valve 18 through the valve C of the reversing device II and the valve D of the reversing device I, the low-pressure low-temperature liquid refrigerant after adiabatic expansion flows into the cold storage 6 through the valve B of the reversing device II 5, and the evaporated low-temperature low-pressure gaseous refrigerant flows into the cold storage compressor 8 through the gas-liquid separator 7, so that the continuous circulation is realized, and the aim of normal operation.
Referring to fig. 4, a hot end inlet thermometer 20 is provided at the inlet of the hot water pipe, and a hot end outlet thermometer 21 and a hot end outlet flow meter 22 are provided at the outlet of the hot water pipe. The temperature of the hot water pipeline in front of and behind the high-temperature heat pump unit 1 can be collected through the hot end inlet thermometer 20 and the hot end outlet thermometer 21, and the water flow in the hot water pipeline can be collected through the hot end outlet flowmeter 22.
The freezer inlet is provided with freezer entry thermometer 23 and freezer entry flowmeter 24, and the freezer export is provided with freezer export thermometer 25. The temperature of the inlet and the outlet of the refrigeration house can be acquired through the refrigeration house inlet thermometer 23 and the refrigeration house outlet thermometer 25, and the flow of the refrigerant can be acquired through the refrigeration house inlet flowmeter 24.
The utility model discloses still include controller 26, hot junction entry thermometer 20, hot junction exit thermometer 21, hot junction export flowmeter 22, freezer entry thermometer 23, freezer entry flowmeter 24, freezer exit thermometer 25, switching-over device 4, switching-over device two 5, solenoid valve 17 and evaporative condenser 19 all with controller electric connection.
In another embodiment, the outlet temperature of the hot water pipeline 9 is 60-65 ℃, and the refrigerating temperature of the cold storage 6 is-32 ℃ to-18 ℃ so as to meet the requirements of users on hot water and refrigerating temperature. In the operation process, the control program is used for meeting various operation working conditions of unmatched cold and hot loads during cold and hot combined supply through data acquisition and accurate calculation, hot water with the temperature of 60-65 ℃ and refrigeration of a refrigeration house with the temperature of-18-32 ℃ can be provided for users at the same time, the energy use cost of the users in the use process is reduced, and the energy utilization rate is improved.
According to the heat load calculation formula Q ═ cm delta t, the heat load Q of the high-temperature heat pump end can be calculatedHeat generationAnd the cooling load Q of the cold storageCold。
In the formula, Q represents the cold load of the work of the refrigeration house or the heat load of the work of the hot end; c represents the specific heat capacity of the working medium; delta t represents the temperature difference of the working medium flowing into and out of the user pipe network; m represents the mass flow of the working medium.
By making Q pairHeat generation、QColdAnd comparing to judge the matching degree of refrigeration and heating. When Q isHeat generation＝QColdThe thermal load and the cold load are matchedA cold-hot combined supply operation mode is adopted; when Q isHeat generation＞QColdWhen the system is in a heating operation mode, the system is mainly in a heating operation mode; when Q isHeat generation＜QColdMeanwhile, the system is mainly in a cooling operation mode. The evaporative condenser changes the serial connection mode through a valve to achieve the effects of supplementing heat and discharging cold; the auxiliary discharge of cold and heat is accomplished by the fan speed of the process controller and the cooling water flow valve on the device 9.
The control algorithm based on the above formula in the control device collects control parameters such as the temperature delta t1 of the inlet and outlet working media of the high-temperature heat pump unit, the flow m1, the temperature delta t2 of the inlet and outlet working media of the refrigeration house, the flow m2 and the like and various valve signals, data are calculated in the controller 26 through a PID control program to make judgment, output signals are transmitted to execution ends such as the reversing device I4, the reversing device II 5, the evaporative condenser 9 and the like, the system works in different operation modes according to load requirements, cold and hot load variation is judged by collecting the temperature and the flow of a cold and hot user main pipe network, and the matching mode of cold and hot combined supply is obtained through calculation. The matching mode of the combined cooling and heating control system determines the coupling relation between the evaporative condenser 19 and the high-temperature heat pump unit 1 by taking the difference between the opening degrees and the cooling and heating loads of the first reversing device 4 and the second reversing device 5 as a judgment quantity.
The heat load of the system is controlled by a hot water inlet and outlet control valve 13 at the hot water heat exchanger end of the high-temperature heat pump according to the heat demand, and the cold load is controlled by a solenoid valve 6 for enabling a refrigerating working medium to enter a refrigeration house to control the flow, so that the control on the running state of the high-temperature heat pump and the cold and heat combined supply system is finally realized, and the running requirement when the cold and heat load is unbalanced can be met.
The utility model discloses simple structure, convenient to use, through the switch and the closed two kinds of states of switching-over device one 4 and switching-over device two 5, can change the refrigerant circulation direction in the system to the state of control system operation. Further realizing various running states of combined cooling and heating supply. In the whole circulation process of the system, the high-temperature heat pump unit 1 consumes a small amount of electric energy by utilizing the higher COP value, absorbs heat from the condensation and heat discharge of the refrigeration house 6, and is converted into high-temperature hot water through the high-temperature heat pump unit 1, so that the energy consumption is reduced, and the purposes of saving energy and improving the energy utilization are achieved.
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 device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
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. A combined cooling and heating control system using a high-temperature heat pump is characterized by comprising: the system comprises a high-temperature heat pump unit, a condenser, a heat recovery heat exchanger, a reversing device I, a reversing device II, a refrigeration house, a gas-liquid separator and a refrigeration house compressor; one side of the high-temperature heat pump unit is connected with a hot water pipeline through the condenser, and the other side of the high-temperature heat pump unit is connected with a circulating pipeline through the heat recovery heat exchanger; the heat recovery heat exchanger is connected with the first reversing device, the second reversing device, the refrigeration house, the gas-liquid separator and the refrigeration house compressor through a circulating pipeline in sequence to form a circulating loop.
2. The combined cooling and heating control system adopting the high-temperature heat pump according to claim 1, wherein an oil separator is arranged on a pipeline communicating the refrigeration house compressor and the heat recovery heat exchanger.
3. The combined cooling and heating control system using the high-temperature heat pump according to claim 1 or 2, wherein a hot water circulating pump is provided on the hot water pipeline.
4. The combined cooling and heating control system adopting the high-temperature heat pump as claimed in claim 3, wherein three connecting pipelines are arranged between the first reversing device and the second reversing device, namely a first connecting pipeline, a second connecting pipeline and a third connecting pipeline, and a high-pressure liquid reservoir, an electromagnetic valve and a throttle valve are sequentially arranged on the first connecting pipeline from the first reversing device to the second reversing device; and an evaporative condenser is arranged on the third connecting pipeline.
5. The cold and heat cogeneration control system adopting the high-temperature heat pump according to claim 4 is characterized in that when in a cold and heat cogeneration operation mode, the first reversing device and the second reversing device are closed, high-temperature and high-pressure gaseous refrigerant compressed by the refrigeration house compressor flows into the heat recovery heat exchanger, the medium in the high-temperature heat pump unit absorbs heat, the refrigerant is cooled, and the refrigerant after heat release flows into the second reversing device through the first reversing device and then sequentially passes through the refrigeration house and the gas-liquid separator to enter the refrigeration house compressor, so that the circulation is not interrupted.
6. The cold and heat cogeneration control system adopting the high-temperature heat pump as claimed in claim 4, wherein when the heating is performed in the main mode, the first reversing device is closed, the second reversing device is opened, the high-temperature high-pressure gaseous refrigerant compressed by the refrigeration house compressor flows into the heat recovery heat exchanger, the refrigerant in the high-temperature heat pump unit cools while absorbing heat, the refrigerant after releasing heat flows into the first reversing device through the first connecting pipeline, flows back to the first reversing device through the third connecting pipeline after flowing into the second reversing device, flows into the second reversing device through the second connecting pipeline, sequentially passes through the refrigeration house and the gas-liquid separator, and enters the refrigeration house compressor, so that the circulation is continuous.
7. The combined cooling and heating control system adopting the high-temperature heat pump according to claim 4, characterized in that when refrigeration is in a main mode of operation, the first reversing device and the second reversing device are opened, high-temperature and high-pressure gaseous refrigerant compressed by the refrigeration storage compressor flows into the heat recovery heat exchanger, refrigerant in the high-temperature heat pump unit absorbs heat and is cooled, the refrigerant after heat release flows back to the first reversing device through the second connecting pipeline after flowing into the second reversing device through the first reversing device and the third connecting pipeline, then flows into the second reversing device through the first connecting pipeline, and then sequentially passes through the refrigeration storage and the gas-liquid separator to enter the refrigeration storage compressor, so that the circulation is continuous.
8. The combined cooling and heating control system using the high temperature heat pump as claimed in claim 1, wherein the inlet of the hot water pipeline is provided with a hot end inlet thermometer, and the outlet of the hot water pipeline is provided with a hot end outlet thermometer and a hot end outlet flowmeter.
9. The combined cooling and heating control system adopting the high-temperature heat pump according to claim 8, wherein a refrigerator inlet thermometer and a refrigerator inlet flowmeter are arranged at the refrigerator inlet, and a refrigerator outlet thermometer is arranged at the refrigerator outlet.
10. The combined cooling and heating control system adopting the high-temperature heat pump according to claim 9, wherein the outlet temperature of the hot water pipeline is 60-65 ℃, and the refrigerating temperature of the refrigerator is-32 to-18 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920864271.XU CN210569335U (en) | 2019-06-06 | 2019-06-06 | Cold and heat combined supply control system adopting high-temperature heat pump |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920864271.XU CN210569335U (en) | 2019-06-06 | 2019-06-06 | Cold and heat combined supply control system adopting high-temperature heat pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145888A (en) * | 2019-06-06 | 2019-08-20 | 西安航空学院 | A kind of cold and heat combined supply control system using high temperature heat pump |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145888A (en) * | 2019-06-06 | 2019-08-20 | 西安航空学院 | A kind of cold and heat combined supply control system using high temperature heat pump |
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