CN111609597A - Automatic water replenishing system and method for heat pump unit - Google Patents

Automatic water replenishing system and method for heat pump unit Download PDF

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Publication number
CN111609597A
CN111609597A CN201910132544.6A CN201910132544A CN111609597A CN 111609597 A CN111609597 A CN 111609597A CN 201910132544 A CN201910132544 A CN 201910132544A CN 111609597 A CN111609597 A CN 111609597A
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CN
China
Prior art keywords
water
water flow
heat pump
pump unit
main controller
Prior art date
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Pending
Application number
CN201910132544.6A
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Chinese (zh)
Inventor
罗亚军
杨继坤
陆扬明
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Copeland Suzhou Co Ltd
Original Assignee
Emerson Climate Technologies Suzhou Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Emerson Climate Technologies Suzhou Co Ltd filed Critical Emerson Climate Technologies Suzhou Co Ltd
Priority to CN201910132544.6A priority Critical patent/CN111609597A/en
Priority to PCT/CN2019/121481 priority patent/WO2020168771A1/en
Publication of CN111609597A publication Critical patent/CN111609597A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B30/00Heat pumps
    • F25B30/02Heat pumps of the compression type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B30/00Heat pumps
    • F25B30/06Heat pumps characterised by the source of low potential heat
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00Arrangement or mounting of control or safety devices
    • F25B49/02Arrangement or mounting of control or safety devices for compression type machines, plants or systems

Abstract

The invention relates to an automatic water replenishing system for a heat pump unit and a water replenishing method thereof. The automatic water replenishing system comprises a water flow detection device, a water replenishing valve, a locking device and a main controller. The water flow detection device is used for monitoring the water flow in a water flow pipeline of the heat pump unit so as to judge whether water is required to be supplemented to the water flow pipeline or not, and a water supplementing signal is sent out when water is required to be supplemented to the water flow pipeline. The main controller is configured to open the water replenishing valve to replenish water to the heat pump unit according to a water replenishing signal sent by the water flow detection device. After water replenishing is repeatedly performed for a preset number of times within preset time, if the water flow detection device still judges that water replenishing is needed for the water flow pipeline, the main controller determines that the heat pump unit has leakage and locks the whole heat pump unit by the locking device.

Description

Automatic water replenishing system and method for heat pump unit
Technical Field
The invention relates to the field of heat pump units, in particular to an automatic water supplementing system for a heat pump unit and a water supplementing method for the heat pump unit.
Background
The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
A heat pump unit system is an apparatus that uses a medium in nature, such as air, water, and soil, to transfer heat to achieve temperature regulation. Specifically, the heat pump system can transfer heat in air, soil, or water around a house to the indoor to heat the indoor air, thereby achieving a winter heating effect. Further, in summer, the heat pump system can transfer indoor heat to the environment around the house, thereby enabling reduction in indoor temperature.
In the heat pump system, water needs to be replenished to the system after the heat pump system is installed for the first time or after leakage occurs during operation. When water is supplemented, tap water needs to be connected to a water system of the heat pump, so that a water supplementing valve is needed to complete the work.
At present, the mechanical automatic water replenishing valve is widely applied. The principle of the mechanical automatic water replenishing valve is as follows: if the water pressure difference between the front and the rear of the valve reaches the valve opening pressure, the water shortage of the water system of the heat pump is represented, at the moment, the water in the tap water pipe can be automatically supplemented into the water system under the action of the water pressure difference until the water pressure difference is reduced, and the water supplementing valve is closed.
The pure mechanical water replenishing valve works purely by the pressure difference between the front and the back of the water replenishing valve. The water replenishing valve has no detection induction system and no feedback system, and belongs to an open-loop control system. If the pressure difference between the front and the back of the water replenishing valve exists all the time, water can be replenished to the system without limitation. Therefore, the pure mechanical water replenishing valve has the following great disadvantages: if the water system side of a user has large water leakage, the mechanical water replenishing valve can continuously replenish water due to the fact that the pressure difference between the front and the rear of the valve exists all the time. This may cause water in the user side water system to leak continuously, which may eventually cause the user's house to be soaked by water, and the whole heat pump system to fail.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide an automatic water replenishing system and a water replenishing method which are used for a heat pump unit, have automatic detection and automatic alarm functions and can realize reasonable water replenishing.
According to one aspect of the invention, an automatic water replenishing system for a heat pump unit is provided. This automatic water charging system includes: the water flow detection device is used for monitoring the water flow in a water flow pipeline of the heat pump unit so as to judge whether the water needs to be supplemented to the water flow pipeline or not, and sending a water supplementing signal when the water needs to be supplemented to the water flow pipeline; the water replenishing valve is opened to replenish water to the water flow pipeline when water is required to be replenished; a main controller electrically connected to the water flow detection device and the water replenishment valve, the main controller configured to control the opening and closing of the water replenishment valve according to determination information of the water flow detection device, wherein the main controller opens the water replenishment valve upon receiving a water replenishment signal; and the locking device is configured to lock the heat pump unit, wherein after the water replenishing is repeatedly performed for a preset number of times within preset time, if the water flow detection device still judges that the water replenishing is required to be performed on the water flow pipeline, the main controller determines that the heat pump unit has leakage and locks the whole heat pump unit by the locking device.
The automatic water replenishing system further comprises an alarm device, and the alarm device is constructed to send an alarm signal when the main controller determines that the heat pump unit has leakage.
Wherein the locking device is configured to perform locking of the heat pump unit after receiving an alarm signal of the alarm device.
Wherein, the water flow detection device is a water flow switch.
The main controller comprises a water supplementing control module used for receiving a water supplementing signal and controlling a water supplementing process.
According to another aspect of the invention, a heat pump unit with the automatic water replenishing system is provided.
According to another aspect of the invention, a method for supplementing water to a heat pump unit by using the automatic water supplementing system is provided, and the method comprises the following steps: a judging step: monitoring the water flow in a water flow pipeline of the heat pump unit by using a water flow detection device to judge whether water needs to be supplemented to the water flow pipeline; water replenishing step: when the water flow detection device judges that water needs to be supplemented to the water flow pipeline, a water supplementing signal is sent to a main controller of the automatic water supplementing system, and the main controller opens a water supplementing valve according to the water supplementing signal to supplement water to the water flow pipeline; locking: after the water replenishing step is repeatedly executed for a preset number of times within preset time, if the water flow detection device still judges that water is required to be replenished to the water flow pipeline, the main controller determines that the heat pump unit has leakage and locks the whole heat pump unit through the locking device.
Wherein, the method also comprises: and after receiving the water supplementing signal, the main controller stops running each device of the heat pump unit and sends an opening instruction to the water supplementing valve. Alternatively, the main controller sends an open command to the water replenishment valve after the heat pump unit stops operating for a preset downtime.
Wherein, the method also comprises: after the water replenishing time is preset for the automatic water replenishing of the water flow pipeline, the main controller closes the water replenishing valve.
Wherein the determining step includes: when the water flow switch judges that water is not needed to be supplied to the water flow pipeline, the water flow switch is closed, the water supply valve is closed, and the heat pump unit operates normally.
Wherein, the method also comprises: after the water replenishing step is repeatedly executed for a preset number of times within preset time, if the water flow detection device still judges that water is required to be replenished to the water flow pipeline, the alarm device sends out an alarm signal, and after the alarm signal is sent out, the heat pump unit is locked.
According to yet another aspect of the invention, a computer-readable medium for performing the above method is provided.
Drawings
The drawings described herein are for illustrative purposes only of exemplary embodiments and are not intended to limit the scope of the present disclosure.
Fig. 1 is a schematic diagram showing a connection line of an exemplary heat pump unit according to the invention.
FIG. 2 is a schematic coupling diagram of a main controller of an automatic refill system according to an embodiment of the present invention.
FIG. 3 is a control flow chart of an automatic water refill system according to an embodiment of the present invention.
Detailed Description
A heat pump system typically comprises a heat exchange side and a user side. The heat exchange side is used to heat or cool water supplied to the user side by, for example, heat exchange between refrigerant and water to meet the heat demand of the user side. The heat exchange side typically has a heat exchanger, refrigerant lines and water lines. The user side typically includes air conditioning components such as a fan coil assembly and/or a geothermal assembly. Heated or cooled water flows in the fan coil assembly and/or the geothermal assembly to heat or cool the environment on the user side.
Fig. 1 shows a schematic view of a fluid connection line of an exemplary heat pump system according to the present invention. Specifically, the heat pump system according to the present invention has a heat exchanger 2, a refrigerant line 3, a water line 4, a water pump 5, and a water expansion tank 6 on the heat exchange side, and further includes a water replenishment valve 1. The water replenishment valve 1 is used to replenish the heat pump system with water prior to initial start-up of the system or in the event of a water leak in the system. The heat pump system according to the invention can employ an electrically controlled automatic water replenishing valve. Downstream of the refill valve 1 (upstream, downstream in this context means upstream, downstream in the direction of water or refrigerant flow) a check valve 7 is also provided to prevent water in the system from flowing backwards through the refill valve 1. A water filter 12 to filter impurities in water to be input into the heat pump system is provided upstream of the water replenishment valve 1. A ball valve 13 is also provided upstream of the water filter 12 upstream of the makeup water valve. A water flow detection device is provided in the water flow line 4. Here, the water flow detection means is a water flow switch 19, and the water flow switch 19 is used to detect the flow of water in the heat pump system.
On the heat exchange side, a water expansion tank 6 is provided downstream of the check valve 7, the water expansion tank 6 serving to balance the water pressure fluctuations in the water circulation line. A water pump 5 for pumping water to the heat exchanger 2 is arranged downstream of the water expansion tank 6. A water inlet temperature sensor 8 and a water outlet temperature sensor 9 are provided on the inlet side and the outlet side of the heat exchanger, respectively. The water inlet temperature sensor 8 and the water outlet temperature sensor 9 are used to measure the water temperature on the water inlet side and the water outlet side of the heat exchanger, respectively.
As shown in fig. 1, a water tank 10 for storing water flowing in the heat pump system is provided in an outdoor water circuit on the user side. An exhaust valve 101 and a pressure buffer valve 102 are provided on the water tank 10 to balance the pressure in the water tank. And an anti-vibration connection 11 and a discharge valve 18 are provided in the water circuit. A fan coil unit 14 and a floor heating unit 15 for adjusting the indoor temperature of the user side are provided indoors.
Although the positions of the various valves, tanks and sensors are described above as being upstream and downstream of the water flow, it will be understood by those skilled in the art that these components may be deleted or added as the case may be, and their positions may be adjusted as the case may be. The embodiments of these modifications described above fall within the scope of the present invention.
In order to overcome the defect that a user side is flooded due to the fact that leakage cannot be detected in time when water is replenished to a heat pump unit in the prior art, the heat pump system has the functions of automatic detection and automatic judgment. In particular, the heat pump system according to the present invention is provided with a water flow detection device in the water circuit capable of detecting the water flow in the user side water system, generating a corresponding electrical signal and transmitting the detected information to the main controller. If the judgment result is that the water flow in the water flow pipeline of the heat pump unit is insufficient, the main controller can open the water replenishing valve to replenish water to the heat pump unit; and if the judgment result is that the water quantity in the water flow pipeline is sufficient, water is not required to be supplied to the heat pump unit, and the water supply valve is closed. Further, the automatic detection and water replenishment system of the heat pump unit system according to the present invention further includes the following determination process: after the preset water replenishing circulation within the preset time, if the water flow detection device still judges that the water amount in the water flow pipeline is insufficient, the water leakage condition exists in the water flow pipeline of the heat pump unit, the water replenishing pump system is not supplemented, and the main controller enables the whole heat pump unit to be locked. In this way, the possibility that the user is flooded due to water supplement when the user side water system leaks can be prevented.
The automatic water replenishing system can utilize the existing water flow switch in the water flow pipeline of the heat pump unit, and the water flow switch can be configured by the heat pump unit system in a default mode in order to avoid the situation that the water pump is damaged due to water flow change. The water replenishing logic of the main controller is performed according to the signal input of the water flow switch, so that additional components and cost are not added.
Hereinafter, the operation of the automatic water replenishing system according to the present invention will be described in more detail with reference to the accompanying drawings. As shown in FIG. 2, the main controller 20 is communicatively coupled with devices such as the water flow switch 19, the water pump 5, the water refill valve 1, the heat exchanger 2, the fan coil 14, and the locking device 30. The water flow switch 19 may be a target water flow switch. When water flows through the target type water flow switch, the baffle in the target type water flow switch can deflect. The water flow switch sends out an opening or closing signal according to the preset water flow. The water flow switch 19 is turned off when the water flow in the water flow line is less than the set water flow, thereby sending a water supplement signal to the main controller 20. The main controller 20 instructs each of the execution units connected to the water flow switch 19 to stop or close the heat pump unit and instructs the water supply valve 1 to open the water supply valve to supply water to the heat pump unit according to the water supply signal from the water flow switch 19. After the water replenishing circulation is carried out for the preset times within the preset time, if the main controller still receives the water replenishing signal sent by the water flow switch, the main controller sends an instruction to the locking device 30 to stop the operation of the whole heat pump unit and lock the heat pump unit. The main controller comprises a water replenishing control module used for controlling the water replenishing process.
Fig. 3 shows a flowchart of an automatic water replenishment method according to an embodiment of the present invention. The water replenishing method comprises the following steps. Step S00: the water flow switch monitors the current water flow condition in the water flow pipeline of the heat pump unit. For example, the water flow switch monitors the water flow rate Qc in the water flow line. Step S10: when the current water flow Qc is detected to be smaller than the preset water flow (namely, the water flow required by the system) Qp, the water flow switch judges that the water flow in the water flow pipeline is insufficient, the water flow switch is disconnected, and a water supplementing signal Ss representing that the water flow in the water flow pipeline is insufficient is sent to the main controller. Step S11: the main controller sends instructions to various executing devices such as a compressor, a fan, a water pump and the like after receiving the water supplementing signal Ss, so that the devices stop operating or are closed, namely: stopping the whole heat pump unit from running; step S12: the main controller sends a command to the water replenishing valve 1 to open, so that water is replenished to the heat pump unit. Alternatively, after the shut down time Tc of the entire heat pump unit has been set to a predetermined value, for example 2 to 10 minutes, the main controller commands the water pump to start operating and simultaneously commands the water replenishment valve 1 to open, thereby replenishing the water to the heat pump unit. Step S13: after the automatic water replenishing is carried out for the preset water replenishing time Ts, for example, after the automatic water replenishing is carried out for 10-50 seconds, the main controller sends a command to the water replenishing valve to close the water replenishing valve, and simultaneously sends a command to the water pump to continuously operate the water pump so as to continuously operate the heat pump unit. Afterwards, return to step S00, if the discharge of water in the rivers pipeline of heat pump set is sufficient, then the water switch is closed, and main control unit no longer sends to the moisturizing valve and carries out moisturizing order once more, and the moisturizing valve is closed, and heat pump set normal operating, promptly: step S20. And if the water flow in the water flow pipeline of the heat pump unit still does not meet the requirement, repeating the steps S10-S13.
Further, if the monitoring result of the water flow switch shows that the water amount in the heat pump unit system still does not meet the requirement after the steps S10-S13 are performed for a predetermined number of times within a predetermined time, for example, after the steps are repeated for 3 times within 1 hour, the main controller determines that there is a leak in the system, and the alarm device sends out an alarm signal, so that the whole heat pump unit stops operating and is locked by the locking device, that is: step S30.
The detection time for the main controller to detect whether the water flow switch is opened or closed can be 2-10 seconds, and the detection time can be determined according to the requirements of a specific system. The detection time is not limited to the above range for other heat pump units.
According to the heat pump unit provided by the invention, water can be supplemented by utilizing the time interval of alarm recovery of the detection element and system restart, so that no additional time consumption is generated, and the water supplementing requirement can be responded more quickly, thereby realizing more reasonable water supplementing.
Exemplary couplings and/or configurations are disclosed for purposes of describing the present invention in detail. Detailed descriptions of specific details, such as specific components, structures, and methods, are provided for a more thorough explanation of the present disclosure. However, it will be apparent to one of ordinary skill in the art that specific details need not be employed, that example couplings and/or configurations may be embodied in many different forms and that these specific details and example configurations should not be construed as limiting the scope of the present disclosure.
Reference numerals
1 water compensating valve
2 Heat exchanger
3 refrigerant line
4 water flow pipeline
5 Water pump
6 water expansion tank
7 check valve
8 water inlet temperature sensor
9 water outlet temperature sensor
10 Water tank
101 exhaust valve
102 pressure buffer valve
11 vibration-proof connector
12 water filter
13 ball valve
14 fan coil
15 ground heating assembly
16 two-way valve
17 pressure balance valve
18 discharge valve
19 water flow switch
20 Main controller
30 locking device

Claims (14)

1. An automatic water supply system for a heat pump unit, the automatic water supply system comprising:
the water flow detection device is used for monitoring the water flow in a water flow pipeline of the heat pump unit so as to judge whether water needs to be supplemented to the water flow pipeline or not, and sending a water supplementing signal when water needs to be supplemented to the water flow pipeline;
the water replenishing valve is opened to replenish water to the water flow pipeline when water is required to be replenished;
a main controller coupled in electrical communication with the water flow detection device and the water refill valve, the main controller configured to control opening and closing of the water refill valve based on the determination of the water flow detection device, wherein the main controller causes the water refill valve to open upon receipt of the water refill signal;
a lock-up device configured to perform a lock-up of the heat pump unit;
after water replenishing is repeatedly performed for a preset number of times within preset time, if the water flow detection device still judges that water replenishing is needed for the water flow pipeline, the main controller determines that the heat pump unit has leakage and locks the whole heat pump unit by the locking device.
2. The automatic water replenishment system of claim 1, further comprising an alarm device configured to issue an alarm signal when the main controller determines that there is a leak in the heat pump unit.
3. The automatic water replenishment system according to claim 2, wherein the locking device is configured to perform locking of the heat pump unit after receiving the alarm signal of the alarm device.
4. The automatic water replenishing system according to any one of claims 1 to 3, wherein the water flow detecting means is a water flow switch.
5. The automatic water replenishing system according to any one of claims 1 to 3, wherein the main controller comprises a water replenishing control module for receiving the water replenishing signal and controlling a water replenishing process.
6. A heat pump unit having an automatic water replenishment system according to claims 1 to 5.
7. A method of supplementing water to a heat pump unit using the automatic water supplementing system of any one of claims 1 to 5, the method comprising:
a judging step: monitoring the water flow in a water flow pipeline of the heat pump unit by using the water flow detection device to judge whether water needs to be supplemented to the water flow pipeline;
water replenishing step: when the water flow detection device judges that water needs to be supplemented to the water flow pipeline, a water supplementing signal is sent to the main controller of the automatic water supplementing system, and the main controller opens the water supplementing valve according to the water supplementing signal so as to supplement water to the water flow pipeline;
locking: after the water replenishing step is repeatedly executed for a preset number of times within preset time, if the water flow detection device still judges that water is required to be replenished to the water flow pipeline, the main controller determines that the heat pump unit has leakage and locks the whole heat pump unit through a locking device.
8. The method of claim 7, wherein the method further comprises:
and after receiving the water supplementing signal, the main controller stops running of each device of the heat pump unit and sends an opening instruction to the water supplementing valve.
9. The method of claim 7, wherein the method further comprises:
the main controller stops running of each device of the heat pump unit after receiving the water supplementing signal;
and after the heat pump unit stops running for a preset shutdown time, the main controller sends an opening instruction to the water replenishing valve.
10. The method of claim 7, wherein the method further comprises:
and after the water flow pipeline is automatically supplied with water for preset water supply time, the main controller closes the water supply valve.
11. The method of claim 7, wherein the water flow detection device is a water flow switch.
12. The method of claim 11, wherein the determining step comprises: when the water flow switch judges that water is not needed to be supplied to the water flow pipeline, the water flow switch is closed, the water supply valve is closed, and the heat pump unit operates normally.
13. The method of claim 7, wherein the method further comprises: and when the main controller determines that the heat pump unit has leakage, an alarm device sends out an alarm signal.
14. A computer readable medium for performing the method recited in claims 7-13.
CN201910132544.6A 2019-02-22 2019-02-22 Automatic water replenishing system and method for heat pump unit Pending CN111609597A (en)

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CN201910132544.6A CN111609597A (en) 2019-02-22 2019-02-22 Automatic water replenishing system and method for heat pump unit
PCT/CN2019/121481 WO2020168771A1 (en) 2019-02-22 2019-11-28 Automatic water replenishing system for heat pump unit and water replenishing method

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CN201910132544.6A CN111609597A (en) 2019-02-22 2019-02-22 Automatic water replenishing system and method for heat pump unit

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CN207214372U (en) * 2017-08-15 2018-04-10 南京慧和建筑技术有限公司 A kind of central air-conditioning automatic water replenishing controller provided with pressure transmitter
CN207279890U (en) * 2017-08-15 2018-04-27 南京慧和建筑技术有限公司 A kind of central air-conditioning automatic water replenishing controller based on Cloud Server
CN207763909U (en) * 2018-01-25 2018-08-24 乐易泰(宁波)热能设备有限公司 A kind of leak water detdction equipment
CN208517447U (en) * 2018-06-29 2019-02-19 唐山钢铁集团有限责任公司 A kind of pressure water replanishing device of blast furnace inclosed recirculated cooling water
CN209944800U (en) * 2019-02-22 2020-01-14 艾默生环境优化技术(苏州)有限公司 Automatic water replenishing system for heat pump unit

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