CN110595126A - Heat pump set with function of internet of things and control circuit thereof - Google Patents
Heat pump set with function of internet of things and control circuit thereof Download PDFInfo
- Publication number
- CN110595126A CN110595126A CN201910904793.2A CN201910904793A CN110595126A CN 110595126 A CN110595126 A CN 110595126A CN 201910904793 A CN201910904793 A CN 201910904793A CN 110595126 A CN110595126 A CN 110595126A
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- CN
- China
- Prior art keywords
- heat pump
- relay
- contactor
- pump unit
- control circuit
- Prior art date
- Legal status (The legal status 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 status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
Abstract
The invention relates to a heat pump unit with the function of Internet of things and a control circuit thereof, belonging to the technical field of heat pumps; the heat pump unit and the control circuit thereof are provided, wherein the heat pump unit can be operated remotely and has good human-computer interface display effect; the control circuit comprises a main loop and a control mainboard, wherein the control mainboard is connected with a touch screen, a GPRS module, a plurality of relays, a plurality of temperature sensors, a normally closed contact of a first thermal relay KH1, a normally closed contact of a second thermal relay KH2, an electronic oil pressure difference switch SP1, a low-pressure switch SP2 and a high-pressure switch SP3, and the GPRS module is wirelessly connected with the mobile terminal; the invention can be applied to the field of heating and cooling.
Description
Technical Field
The invention discloses a heat pump unit with an Internet of things function and a control circuit thereof, and belongs to the technical field of heat pumps.
Background
The heat pump is a device which can obtain low-grade heat energy from the nature and provide high-grade heat energy which can be used by people through high-temperature energy to do work. The heat pump unit must be provided with a set of automatic protection device corresponding to the heat pump unit, so that the equipment works within a safe condition range, and the normal and reliable work of the whole system is ensured.
After the heat pump unit is put into operation, real-time intelligent monitoring is not available, and operators need to regularly go to patrol. The efficiency of checking the running state of the system is low by depending on the on-site patrol of personnel, and the real-time performance is poor. The existing authorization bulletin number is CN 207849875U, and the name is a heat pump controller based on functions of the Internet of things, and the heat pump controller comprises a heat pump controller, a manual operation device and a smart phone, wherein a control mainboard is arranged inside the heat pump controller, a plurality of temperature sensors, a plurality of electronic switches, a phase sequence protection device, a compressor, a four-way valve, a fan, a water pump, a chassis electric heater, an electronic expansion valve and an operation/fault lamp are connected to the control mainboard, a main control chip, a communication interface and a Wi-Fi module are arranged inside the manual operation device, the communication interface is in optical coupling connection with the control mainboard through three core wires, and the Wi-Fi module is in wireless connection with the smart phone and is in wired connection with the. The heat pump controller can operate the heat pump through a mobile phone, but the Wi-Fi coverage range is limited, the display content of a human-computer interface of a manual operator is less, and therefore the improvement space is provided.
Disclosure of Invention
The invention provides a heat pump unit with the function of Internet of things and a control circuit thereof, overcomes the defects in the prior art, and provides the heat pump unit which can be operated remotely and has a good human-computer interface display effect and the control circuit thereof.
In order to solve the technical problems, the invention adopts the technical scheme that: a control circuit of a heat pump unit with an Internet of things function comprises a main loop and a control main board, wherein in the main loop, a three-phase power source passes through a first circuit breaker QS1 and then is connected with a first winding of a compressor motor M through a main contact of a first contactor KM1, and the first circuit breaker QS1 is also connected with a second winding of the compressor motor M through a main contact of a second contactor KM 2; a second circuit breaker QS2 is disposed between the first circuit breaker QS1 and the main contact of the first contactor KM 1; a main contact of a first thermal relay KH1 is disposed between a first winding of the compressor motor M and a main contact of the first contactor KM1, and a main contact of a second thermal relay KH2 is disposed between a second winding of the compressor motor M and a main contact of the second contactor KM 2;
the control mainboard is connected with a touch screen, a GPRS module, a plurality of relays, a plurality of temperature sensors, a normally closed contact of a first thermal relay KH1, a normally closed contact of a second thermal relay KH2, an electronic oil pressure difference switch SP1, a low-pressure switch SP2 and a high-pressure switch SP3, and the GPRS module is in wireless connection with the mobile terminal.
Further, the liquid supply device comprises a liquid supply electromagnetic valve, an electric heater R and a FAN FAN, wherein the relays comprise a first relay KA1, a second relay KA2 and a third relay KA3, a normally open contact of the first relay KA1 is connected with the first contactor KM1 in series at two ends of a power supply, a normally open contact of the second relay KA2 is connected with the second contactor KM2 in series at two ends of the power supply, a normally open contact of the third relay KA3 is connected with a coil J of the liquid supply electromagnetic valve in series at two ends of the power supply, a normally closed contact of the first contactor KM1 is connected with the electric heater R in series at two ends of the power supply, and a normally open contact of the first contactor KM1 is connected with the FAN FAN in series at two ends of the power.
Further, the temperature sensor includes a first thermocouple, a second thermocouple, a third thermocouple, a fourth thermocouple, and a fifth thermocouple.
The phase sequence protector XX is arranged on the control main board, the phase sequence protector XX is connected with each phase of the three-phase power supply, and the control main board is respectively connected with the phase sequence protector XX, the button SB and the wireless remote control switch RK.
Further, the control main board is connected to the second circuit breaker QS 2.
A heat pump unit with the function of the Internet of things comprises a compressor, a condenser, a liquid supply electromagnetic valve, an expansion valve and an evaporator which are sequentially connected by a working medium pipeline; the heat pump unit control circuit is arranged in the cabinet and is the control circuit of the heat pump unit with the function of the Internet of things.
Further, the electric heater R is arranged at the bottom of the compressor, and the touch screen is embedded in a cabinet door of the cabinet.
Compared with the prior art, the invention has the following beneficial effects.
The control mainboard is adopted to realize automatic protection control on the heat pump, so that the space is saved and more complex control can be completed compared with the traditional low-voltage electrical appliance control device; the GPRS module is adopted in the invention, so that a user can remotely monitor and operate the heat pump unit; the invention adopts a large-size touch screen, displays more contents, enriches control options and is easy to operate.
Drawings
Fig. 1 is a schematic structural diagram of a heat pump unit with an internet of things function according to an embodiment of the present invention.
Fig. 2 is an electrical schematic diagram of a main circuit according to an embodiment of the present invention.
Fig. 3 is an electrical schematic diagram of a control loop according to an embodiment of the present invention.
Fig. 4 is a schematic connection diagram of a control motherboard according to an embodiment of the present invention.
In the figure, 1-a compressor, 2-a condenser, 3-a liquid supply electromagnetic valve, 4-an expansion valve, 5-an evaporator, 6-a water source, 7-a water pump, 8-a control main board, 9-a touch screen, 10-a GPRS module, 11-a mobile terminal, 12-a first thermocouple, 13-a second thermocouple, 14-a third thermocouple, 15-a fourth thermocouple and 16-a fifth thermocouple.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The invention relates to a control circuit of a heat pump unit with an internet of things function, which comprises a main loop and a control mainboard 8, wherein as shown in fig. 2, in the main loop, a three-phase power source passes through a first circuit breaker QS1 and then is connected with a first winding of a compressor motor M through a main contact of a first contactor KM1, and the first circuit breaker QS1 is also connected with a second winding of the compressor motor M through a main contact of a second contactor KM 2; a second circuit breaker QS2 is disposed between the first circuit breaker QS1 and the main contact of the first contactor KM 1; a main contact of the first thermal relay KH1 is disposed between a first winding of the compressor motor M and a main contact of the first contactor KM1, and a main contact of the second thermal relay KH2 is disposed between a second winding of the compressor motor M and a main contact of the second contactor KM 2;
as shown in fig. 4, the control main board 8 is connected with a touch screen 9, a GPRS module 10, a plurality of relays, a plurality of temperature sensors, a normally closed contact of the first thermal relay KH1, a normally closed contact of the second thermal relay KH2, an electronic oil pressure difference switch SP1, a low-pressure switch SP2 and a high-pressure switch SP3, and the GPRS module 10 is wirelessly connected with the mobile terminal 11.
As shown in fig. 3, the control circuit further includes a liquid supply solenoid valve 3, an electric heater R, a FAN, the relay includes a first relay KA1, a second relay KA2 and a third relay KA3, a normally open contact of the first relay KA1 is connected in series with the two ends of the power supply of the first contactor KM1, a normally open contact of the second relay KA2 is connected in series with the two ends of the power supply of the second contactor KM2, a normally open contact of the third relay KA3 is connected in series with the coil J of the liquid supply solenoid valve at the two ends of the power supply, a normally closed contact of the first contactor KM1 is connected in series with the electric heater R at the two ends of the power supply, and a normally open contact of the first contactor KM1 is connected in series with the FAN.
The temperature sensors include a first thermocouple 12, a second thermocouple 13, a third thermocouple 14, a fourth thermocouple 15, and a fifth thermocouple 16.
The control circuit further comprises a phase sequence protector XX, a button SB and a wireless remote control switch RK, the phase sequence protector XX is arranged on the control main board 8, the phase sequence protector XX is connected with each phase of the three-phase power supply, and the control main board 8 is respectively connected with the phase sequence protector XX, the button SB and the wireless remote control switch RK. The control board 8 is connected to a second circuit breaker QS 2.
As shown in fig. 1, a heat pump unit with internet of things function comprises a compressor 1, a condenser 2, a liquid supply electromagnetic valve 3, an expansion valve 4 and an evaporator 5 which are sequentially connected by a working medium pipeline; the heat pump unit control circuit is arranged in the cabinet and is the control circuit of the heat pump unit with the function of the Internet of things.
The first thermocouple 12 is used for measuring the ambient temperature, the second thermocouple 13 is used for measuring the water inlet temperature of the condenser, the third thermocouple 14 is used for measuring the water outlet temperature of the condenser, the fourth thermocouple 15 is used for measuring the water inlet temperature of the evaporator, and the fifth thermocouple 16 is used for measuring the water outlet temperature of the evaporator.
In order to prevent a large amount of lubricant oil inside the compressor from flowing into the refrigeration circuit, the electric heater R is provided at the bottom of the compressor 1. The touch screen 9 is embedded in the cabinet door of the cabinet, and in order to improve the display effect, a touch screen with a model WT19150, a screen size of 15.6 inches and a resolution of 1920 × 1080 can be adopted. The touch screen is integrated with 256MB of running memory and 4GB of storage memory. The control motherboard 8 may be of the type PSC 230R. The GPRS terminal 10 may be a WTBOX-LITE type terminal, and a mobile phone SIM card is built in the terminal.
The working process and principle of the invention are further explained: when people are beside the heat pump unit, the operation can be carried out on the touch screen 9. The control method of the heat pump unit mainly comprises the following steps:
after the heat pump unit is electrified, waiting for at least 3 minutes for electrifying the first winding of the compressor motor M, and after 0.1-3 seconds, electrifying the second winding of the compressor motor M, and starting the compressor;
after the compressor is started, waiting for 2-5 seconds, and opening the liquid supply electromagnetic valve 3;
judging whether the current winding current of the compressor motor M is overloaded or not, if so, disconnecting the main contact of the thermal relay to stop the compressor 1, and closing the liquid supply electromagnetic valve 3;
judging whether the current three-phase power supply has phase loss and phase inversion, if the current three-phase power supply has phase loss and phase inversion, actuating a phase sequence protection relay XX, controlling a main board 8 to send an instruction, stopping a compressor 1, and closing a liquid supply electromagnetic valve 3;
judging whether the oil pressure difference of the current compressor 1 is lower than a set rated value or not, if the oil pressure difference of the current compressor 1 is lower than the set rated value and lasts for 1-3 seconds, closing an electronic oil pressure difference switch SP1 to stop the compressor 1 and closing a liquid supply electromagnetic valve 3;
judging whether the pressure of the exhaust pipe of the current compressor 1 is higher than a set high-pressure value or not, if so, closing a high-pressure switch SP2 to stop the compressor 1 and close the liquid supply electromagnetic valve 3;
judging whether the pressure of the air suction pipe of the compressor 1 is lower than a set high pressure value or not, if the pressure of the air suction pipe of the compressor 1 is lower than the set low pressure value and lasts for 8-28 seconds, closing a low pressure switch SP3 to stop the compressor 1 and closing a liquid supply electromagnetic valve 3;
judging whether the temperature of the water outlet of the current condenser 2 is higher than a set maximum temperature, such as 85 ℃, if the temperature of the water outlet of the current condenser 2 is higher than the set maximum temperature, controlling the main board 8 to send an instruction to stop the compressor 1, and closing the liquid supply electromagnetic valve 3;
judging whether the temperature of the water outlet of the evaporator 5 is lower than a set minimum temperature, such as 4 ℃, if the temperature of the water outlet of the evaporator 5 is lower than a set low temperature, controlling the main board 8 to send an instruction to stop the compressor 1 and close the liquid supply electromagnetic valve 3;
after the heat pump unit is powered off, the liquid supply electromagnetic valve 3 is closed, and after 2-5 seconds, the compressor 1 is stopped.
When the first winding of the compressor motor M is energized, the FAN embedded in the electric cabinet casing starts to work to dissipate heat. When the first winding of the compressor motor M is de-energized and the first and second circuit breakers QS1 and QS2 are in an on state, the electric heater R starts to operate. The output of control mainboard 8 is equipped with opto-coupler relay, connects first relay KA1, second relay KA2 and third relay KA3 respectively through opto-coupler relay, can keep apart AC contactor's winding and the coil J that supplies the liquid solenoid valve with control mainboard 8, reduces control mainboard 8 and produces electromagnetic interference's possibility. The memory in the touch screen 9 can store various operating parameters and curves of the heat pump unit.
In addition, the unit is started and stopped through a button SB arranged at the far position of the heat pump unit. And a wireless remote control switch RK can also be used for starting and stopping the heat pump unit at a longer distance. The mobile terminal 11 can also be used for transmitting an instruction to the server, the server transmits the instruction to the GPRS module 10 through a 2G signal, and the GPRS module 10 transmits the instruction to the control mainboard 8 for remote monitoring and operation. On the contrary, the control main board 8 may also transmit the real-time parameters of the heat pump unit to the mobile terminal 11.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (7)
1. The utility model provides a heat pump set's control circuit with thing networking function which characterized in that: the three-phase power supply system comprises a main circuit and a control main board (8), wherein in the main circuit, a three-phase power supply passes through a first circuit breaker QS1 and then is connected with a first winding of a compressor motor M through a main contact of a first contactor KM1, and the first circuit breaker QS1 is also connected with a second winding of the compressor motor M through a main contact of a second contactor KM 2; a second circuit breaker QS2 is disposed between the first circuit breaker QS1 and the main contact of the first contactor KM 1; a main contact of a first thermal relay KH1 is disposed between a first winding of the compressor motor M and a main contact of the first contactor KM1, and a main contact of a second thermal relay KH2 is disposed between a second winding of the compressor motor M and a main contact of the second contactor KM 2;
the control main board (8) is connected with a touch screen (9), a GPRS module (10), a plurality of relays, a plurality of temperature sensors, a normally closed contact of a first thermal relay KH1, a normally closed contact of a second thermal relay KH2, an electronic oil pressure difference switch SP1, a low-pressure switch SP2 and a high-pressure switch SP3, and the GPRS module (10) is in wireless connection with the mobile terminal (11).
2. The control circuit of the heat pump unit with the function of the internet of things according to claim 1, characterized in that: still include to supply liquid solenoid valve (3), electric heater R, FAN FAN, the relay includes first relay KA1, second relay KA2 and third relay KA3, the normally open contact of first relay KA1 with first contactor KM1 establishes ties at the both ends of power, the normally open contact of second relay KA2 with second contactor KM2 establishes ties at the both ends of power, the normally open contact of third relay KA3 and the coil J who supplies the liquid solenoid valve establish ties at the both ends of power, the normally closed contact of first contactor KM1 and electric heater R establish ties at the both ends of power, the normally open contact of first contactor KM1 and FAN FAN establish ties at the both ends of power.
3. The control circuit of the heat pump unit with the function of the internet of things according to claim 1, characterized in that: the temperature sensor comprises a first thermocouple (12), a second thermocouple (13), a third thermocouple (14), a fourth thermocouple (15) and a fifth thermocouple (16).
4. The control circuit of the heat pump unit with the function of the internet of things according to claim 2, characterized in that: the phase sequence protection device is characterized by further comprising a phase sequence protection device XX, a button SB and a wireless remote control switch RK, wherein the phase sequence protection device XX is arranged on the control main board (8), the phase sequence protection device XX is connected with each phase of the three-phase power supply, and the control main board (8) is connected with the phase sequence protection device XX, the button SB and the wireless remote control switch RK respectively.
5. The control circuit of the heat pump unit with the function of the internet of things according to claim 4, characterized in that: the control main board (8) is connected with the second circuit breaker QS 2.
6. The utility model provides a heat pump set with thing networking function which characterized in that: comprises a compressor (1), a condenser (2), a liquid supply electromagnetic valve (3), an expansion valve (4) and an evaporator (5) which are sequentially connected by a working medium pipeline; the heat pump unit control circuit is the control circuit of the heat pump unit with the function of the Internet of things, which is disclosed in any one of claims 1 to 5.
7. The heat pump unit with the function of the internet of things according to claim 6, wherein: the electric heater R is arranged at the bottom of the compressor (1), and the touch screen (9) is embedded in a cabinet door of the cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910904793.2A CN110595126A (en) | 2019-09-24 | 2019-09-24 | Heat pump set with function of internet of things and control circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910904793.2A CN110595126A (en) | 2019-09-24 | 2019-09-24 | Heat pump set with function of internet of things and control circuit thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110595126A true CN110595126A (en) | 2019-12-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910904793.2A Pending CN110595126A (en) | 2019-09-24 | 2019-09-24 | Heat pump set with function of internet of things and control circuit thereof |
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| Country | Link |
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| CN (1) | CN110595126A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2894417A1 (en) * | 2014-01-09 | 2015-07-15 | Stiebel Eltron GmbH & Co. KG | Heat pump device and method for operating same |
| CN204665690U (en) * | 2015-04-29 | 2015-09-23 | 广东芬尼克兹节能设备有限公司 | A kind of source pump stoppage protection system |
| CN207884276U (en) * | 2018-03-16 | 2018-09-18 | 中山市信泰机械设备有限公司 | Cooling-water machine control circuit |
| CN109780626A (en) * | 2017-11-13 | 2019-05-21 | 河北省机电一体化中试基地 | Solar heat pump trilogy supply intelligence control system and its control method based on Internet of Things |
| CN109883061A (en) * | 2019-04-02 | 2019-06-14 | 刘斯汉 | The control system of space energy Teat pump boiler |
| CN210718239U (en) * | 2019-09-24 | 2020-06-09 | 深圳市辉宏技术有限公司 | Heat pump set with function of internet of things and control circuit thereof |
-
2019
- 2019-09-24 CN CN201910904793.2A patent/CN110595126A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2894417A1 (en) * | 2014-01-09 | 2015-07-15 | Stiebel Eltron GmbH & Co. KG | Heat pump device and method for operating same |
| CN204665690U (en) * | 2015-04-29 | 2015-09-23 | 广东芬尼克兹节能设备有限公司 | A kind of source pump stoppage protection system |
| CN109780626A (en) * | 2017-11-13 | 2019-05-21 | 河北省机电一体化中试基地 | Solar heat pump trilogy supply intelligence control system and its control method based on Internet of Things |
| CN207884276U (en) * | 2018-03-16 | 2018-09-18 | 中山市信泰机械设备有限公司 | Cooling-water machine control circuit |
| CN109883061A (en) * | 2019-04-02 | 2019-06-14 | 刘斯汉 | The control system of space energy Teat pump boiler |
| CN210718239U (en) * | 2019-09-24 | 2020-06-09 | 深圳市辉宏技术有限公司 | Heat pump set with function of internet of things and control circuit thereof |
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