CN107726531B - Heat pump fresh air system and control method thereof - Google Patents
Heat pump fresh air system and control method thereof Download PDFInfo
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- CN107726531B CN107726531B CN201711121390.8A CN201711121390A CN107726531B CN 107726531 B CN107726531 B CN 107726531B CN 201711121390 A CN201711121390 A CN 201711121390A CN 107726531 B CN107726531 B CN 107726531B
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000011084 recovery Methods 0.000 claims abstract description 50
- 238000007599 discharging Methods 0.000 claims abstract description 49
- 238000007791 dehumidification Methods 0.000 claims abstract description 47
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 238000005192 partition Methods 0.000 claims description 30
- 230000008569 process Effects 0.000 claims description 8
- 238000000746 purification Methods 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000005057 refrigeration Methods 0.000 abstract description 7
- 239000003507 refrigerant Substances 0.000 description 17
- 230000002457 bidirectional effect Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000004887 air purification Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
- F24F7/08—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/28—Arrangement or mounting of filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
- F24F3/1405—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification in which the humidity of the air is exclusively affected by contact with the evaporator of a closed-circuit cooling system or heat pump circuit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
- F24F3/147—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification with both heat and humidity transfer between supplied and exhausted air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a heat pump fresh air system and a control method thereof, wherein the system comprises the following components: the outdoor fresh air introducing system is arranged in the outdoor fresh air circulating channel, the indoor air discharging system is arranged in the indoor air exhausting channel, one part of the heat pump system is arranged in the indoor air exhausting channel, and the other part of the heat pump system is arranged in the outdoor fresh air circulating channel. The invention has the advantages that: (1) The heat pump system can work according to five modes of refrigeration, heating, dehumidification, no heat recovery, dehumidification, partial heat recovery, dehumidification and total heat recovery under the control of the control system, so that the annual heat recovery and the dehumidification treatment of fresh air under the high humidity condition are realized; and (2) high heat recovery efficiency and low wind resistance.
Description
Technical Field
The invention relates to a heat pump fresh air system and a control method thereof, in particular to a heat pump fresh air system which has five working modes of refrigeration, heating, dehumidification, no heat recovery, dehumidification, partial heat recovery, dehumidification and total heat recovery, improves heat recovery efficiency and can reduce resistance of an air circulation channel, and a control method thereof, and belongs to the technical field of fresh air purification.
Background
The fresh air fan mainly has two main types: fresh air machine with heat recovery function, fresh air machine without heat recovery function.
For a fresh air fan with a heat recovery function, heat recovery is mainly realized through a heat exchange core, for example, the fresh air fan for heat recovery disclosed in patent 201610547610.2 is realized by arranging heat recovery cores (heat exchange cores) on fresh air and exhaust channels. The fresh air fan adopting the heat exchange core has a simple structure, but the heat recovery efficiency changes along with the change of the outdoor environment temperature, and the heat exchange efficiency is lower, and the resistance of air is larger. At the same time, this new fan cannot handle the humidity of the air.
In order to solve the humidity problem of indoor air, the invention patent 201710206979.1 discloses a heat pump type heat recovery fresh air purification and dehumidification integrated machine which utilizes the principle of a heat pump to treat the humidity of fresh air. The integrated machine overcomes the problem of large resistance of an air circulation channel, but has lower heat recovery efficiency and can not realize heat recovery in winter.
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims to provide a heat pump fresh air system which has five working modes of refrigeration, heating, dehumidification, no heat recovery, dehumidification, partial heat recovery, dehumidification and total heat recovery, improves the heat recovery efficiency and can reduce the resistance of an air circulation channel, and a control method of the heat pump fresh air system.
In order to achieve the above object, the present invention adopts the following technical scheme:
a heat pump fresh air system, comprising: the shell, and a heat pump system, an outdoor fresh air introducing system, an indoor air discharging system and a control system which are arranged in the shell, wherein,
the outer shell is separated into an outdoor fresh air circulation channel and an indoor air exhaust channel by a middle partition plate with a third air valve, the symmetrical two ends of the outdoor fresh air circulation channel are respectively provided with an outdoor fresh air inlet and an outdoor fresh air outlet, and the symmetrical two ends of the indoor air exhaust channel are respectively provided with an outdoor air outlet and an indoor air outlet;
the outdoor fresh air introducing system is arranged in the outdoor fresh air circulating channel, the indoor air discharging system is arranged in the indoor air discharging channel, the compressor, the four-way valve and part of heat exchangers of the heat pump system are arranged in the indoor air discharging channel and are positioned between the second fan of the indoor air discharging system and the outdoor air outlet, and the other part of heat exchangers of the heat pump system are arranged in the outdoor fresh air circulating channel and are positioned between the first fan of the outdoor fresh air introducing system and the outdoor fresh air introducing port;
the control system collects and processes the temperature data at the outdoor fresh air inlet and the humidity data at the indoor air outlet and CO 2 The concentration data controls a third air valve, a heat pump system, an outdoor fresh air introducing system and an indoor air discharging system on the intermediate plate.
The heat pump fresh air system is characterized in that the heat pump system comprises: the device comprises a compressor, a four-way valve, an electromagnetic valve, a heat exchanger, a throttle valve, a plurality of connecting pipes and an air return pipe, wherein a d port of the four-way valve is connected with the compressor through the connecting pipe, a s port is connected with the compressor through the air return pipe, a c port is connected with one connecting pipe, the connecting pipe is divided into two branches at the tail end, the electromagnetic valve, the heat exchanger and the throttle valve are sequentially arranged on each branch, the first branch is arranged in an indoor air exhaust channel, the electromagnetic valve of the second branch is arranged in the indoor air exhaust channel, the heat exchanger and the throttle valve are arranged in an outdoor fresh air circulation channel, the two branches are connected with a third heat exchanger positioned at the upstream of the heat exchanger of the second branch after being combined, and the third heat exchanger is connected with an e port of the four-way valve through the connecting pipe.
The foregoing heat pump fresh air system, characterized in that the foregoing outdoor fresh air intake system includes: the air conditioner comprises a first air valve, a first filter screen, a first fan and a purifying combination unit, wherein the first air valve and the first filter screen are arranged at an outdoor fresh air inlet, the first filter screen is positioned at the inner side, the first fan and the purifying combination unit are arranged at a fresh air outlet, and the first fan is positioned at the inner side.
The heat pump fresh air system is characterized in that the indoor air exhaust system comprises: the second air valve, the second fan and the second filter screen, wherein, the second air valve sets up in outdoor air outlet department, and second fan and second filter screen set up in indoor air exit department to the second fan is located the inboard.
The heat pump fresh air system is characterized in that the control system comprises: controller, temperature sensor and CO 2 The temperature sensor is arranged at the outdoor fresh air inlet, and CO is arranged at the outdoor fresh air inlet 2 The sensor and the humidity sensor are arranged at the indoor air outlet, the temperature sensor and the CO 2 The sensor and the humidity sensor are both in signal connection with the controller.
The heat pump fresh air system is characterized in that the controller is arranged in an indoor air exhaust channel.
The control method of the heat pump fresh air system is characterized by comprising the following steps:
step1: starting up;
step2: detecting indoor relative humidity RH_test through a humidity sensor at an indoor air outlet, and turning to Step10 if RH_test > RH_set; if RH_test is less than or equal to RH_set, turning to Step3;
step3: CO passing through indoor air outlet 2 Sensor detects indoor CO 2 Concentration of CO of (2) 2 Test, if CO 2 _Test>CO 2 Set, go to Step5; if CO 2 _Test≤CO 2 Set, go to Step4;
step4: the heat pump system does not work, the whole heat pump fresh air system works in an internal circulation air purification mode, and then Step9 is performed;
step5: detecting the outdoor fresh air temperature Tfa_test by a temperature sensor at the outdoor fresh air inlet, and turning to Step6 if Tfa_test > Tfa_SetH; if Tfa_SetL < Tfa_test is less than or equal to Tfa_SetH, turning to Step7; if Tfa_test is less than or equal to Tfa_SetL, turning to Step8;
step6: the heat pump system works in a fresh air side refrigeration mode, and then the process goes to Step9;
step7: the heat pump system does not work, the whole heat pump fresh air system works in a pure fresh air mode, and then Step9 is carried out;
step8: the heat pump system works according to a fresh air side heating mode, and then the Step9 is carried out;
step9: a controller of the control system receives an on-off command of the heat pump fresh air system, and if the on-off command is not received, the process goes to Step2; if the shutdown instruction is received, the heat pump fresh air system is shut down;
step10: CO passing through indoor air outlet 2 Sensor detects indoor CO 2 Concentration of CO of (2) 2 Test, if CO 2 _Test>CO 2 Set, go to Step12; if CO 2 _Test≤CO 2 Set, go to Step11;
step11: the heat pump system works according to the fresh air side internal circulation dehumidification mode, and then the Step9 is carried out;
step12: detecting the outdoor fresh air temperature Tfa_test by a temperature sensor at the outdoor fresh air inlet, and turning to Step13 if Tfa_test > Tfa_SetH; if Tfa_SetL < Tfa_test is less than or equal to Tfa_SetH, turning to Step14; if Tfa_test is less than or equal to Tfa_SetL, turning to Step15;
step13: the heat pump system works in a fresh air side dehumidification mode, and then the Step9 is carried out;
step14: the heat pump system works according to a fresh air side dehumidification and partial heat recovery mode, and then the process goes to Step9;
step15: the heat pump system works according to the fresh air side dehumidification and total heat recovery mode, and then the process goes to Step9.
The invention has the advantages that:
(1) The heat pump fresh air system realizes dehumidification and heat recovery by utilizing the heat pump principle, different parts of the heat pump system are arranged in the outdoor fresh air circulation channel and the indoor air exhaust channel, and under the control of the control system, the heat pump system can work according to five modes of refrigeration, heating, dehumidification, no heat recovery, dehumidification, partial heat recovery, dehumidification and total heat recovery, so that the annual heat recovery and the dehumidification treatment of fresh air under the high humidity condition are realized, and clean fresh air meeting the humidity requirement is provided for the indoor environment;
(2) According to the heat pump fresh air system, the wind resistance of the heat exchanger of the heat pump system is far smaller than that of the heat recovery filter element, and the heat exchange efficiency is far higher than that of the heat recovery filter element, so that the resistance of an air circulation channel is reduced while the heat recovery efficiency is improved;
(3) The control method of the heat pump fresh air system is easy to implement.
Drawings
FIG. 1 is a schematic diagram of the components of a heat pump fresh air system of the present invention;
fig. 2 is a control block diagram of the heat pump fresh air system of the present invention.
Meaning of reference numerals in the drawings:
101-compressor, 102-four-way valve, 103-connecting pipe, 110-connecting pipe, 111-solenoid valve, 112-connecting pipe, 113-heat exchanger, 114-throttle valve, 115-connecting pipe, 120-connecting pipe, 121-solenoid valve, 122-connecting pipe, 123-heat exchanger, 124-connecting pipe, 125-throttle valve, 126-connecting pipe, 130-connecting pipe, 131-heat exchanger, 132-connecting pipe, 133-muffler;
201-a first air valve, 202-a first filter screen, 203-a first fan and 204-a purifying combination unit;
301-a second air valve, 302-a second fan and 303-a second filter screen;
401-a shell, 402-a middle partition plate, 403-a third air valve, 404-an outdoor fresh air inlet, 405-a fresh air outlet, 406-an outdoor air outlet and 407-an indoor air outlet;
501-controller, 502-temperature sensor, 503-CO 2 Sensor, 504-humidity sensor.
Detailed Description
The invention is described in detail below with reference to the drawings and the specific embodiments.
A first part: the composition of the fresh air system of the heat pump of the invention
Referring to fig. 1, the heat pump fresh air system of the present invention includes: the housing 401, a heat pump system, an outdoor fresh air intake system, an indoor air discharge system and a control system provided in the housing 401.
1. Outer casing
Referring to fig. 1, a middle partition plate 402 is provided in an interior of a housing 401, a third air valve 403 is provided on the middle partition plate 402, and the housing 401 is partitioned into an outdoor fresh air circulation passage and an indoor air discharge passage by the middle partition plate 402 with the third air valve 403.
The two symmetrical ends of the outdoor fresh air circulation channel are respectively provided with an outdoor fresh air inlet 404 and a fresh air outlet 405.
The symmetrical two ends of the indoor air exhaust channel are respectively provided with an outdoor air outlet 406 and an indoor air outlet 407.
2. Outdoor fresh air introducing system
The outdoor fresh air introducing system is arranged in the outdoor fresh air circulating channel.
Referring to fig. 1, the outdoor fresh air introduction system includes: a first air valve 201, a first filter screen 202, a first fan 203 and a purification combination unit 204.
The first damper 201 and the first filter 202 are disposed at the outdoor fresh air introduction port 404, and the first filter 202 is located at the inner side.
The first fan 203 and the purge combination unit 204 are disposed at the fresh air outlet 405, and the first fan 203 is located on the inner side.
3. Indoor air exhaust system
The indoor air exhaust system is arranged in the indoor air exhaust channel.
Referring to fig. 1, the indoor air discharging system includes: a second air valve 301, a second fan 302 and a second filter screen 303.
The second damper 301 is provided at the outdoor outlet 406.
The second fan 302 and the second filter 303 are disposed at the indoor air outlet 407, and the second fan 302 is located at the inner side.
The first air valve 201, the second air valve 301 and the third air valve 403 are matched with different on-off control of the first fan 203 and the second fan 302, so that two air treatment modes of internal circulation and external circulation can be realized.
4. Heat pump system
One part of the heat pump system is arranged in the indoor air exhaust channel, and the other part of the heat pump system is arranged in the outdoor fresh air circulation channel.
Referring to fig. 1, the heat pump system includes: compressor 101, four-way valve 102, solenoid valve 111, solenoid valve 121, heat exchanger 113, heat exchanger 123, heat exchanger 131, throttle valve 114, throttle valve 125, muffler 133, and several connecting pipes (connecting pipe 103, connecting pipe 110, connecting pipe 112, connecting pipe 115, connecting pipe 120, connecting pipe 122, connecting pipe 124, connecting pipe 126, connecting pipe 130, connecting pipe 132).
The compressor 101 and the four-way valve 102 are arranged in an indoor air exhaust channel, a d port of the four-way valve 102 is connected with the compressor 101 through a connecting pipe, a s port is connected with the compressor 101 through an air return pipe 133, a c port is connected with a connecting pipe 103, the connecting pipe 103 is divided into two branches at the tail end, a solenoid valve 111, a heat exchanger 113 and a throttle valve 114 are sequentially arranged on a first branch, a solenoid valve 121, a heat exchanger 123 and a throttle valve 125 are sequentially arranged on a second branch, wherein the first branch is arranged in the indoor air exhaust channel, and the compressor 101, the four-way valve 102 and the branch are positioned between a second fan 302 of an indoor air exhaust system and an outdoor air outlet 406; the solenoid valve 121 of the second branch is disposed in the indoor air exhaust passage, the heat exchanger 123 and the throttle valve 125 are disposed in the outdoor fresh air circulation passage, and the heat exchanger 123 and the throttle valve 125 are located between the first fan 203 of the outdoor fresh air introduction system and the outdoor fresh air introduction port 404. The two branches are joined and then connected with a third heat exchanger 131, the third heat exchanger 131 is positioned at the upstream of the second branch heat exchanger 123 according to the air flow direction, and finally the third heat exchanger 131 is connected with the e port of the four-way valve 102 through a connecting pipe 132.
5. Control system
The control system collects and processes the temperature data at the outdoor fresh air inlet 404 and the humidity data at the indoor air outlet 407, and the CO 2 The concentration data controls the third damper 403, the heat pump system, the outdoor fresh air intake system, and the indoor air exhaust system on the intermediate plate 402.
Referring to fig. 1, the control system includes: controller 501, temperatureDegree sensor 502, CO 2 A sensor 503 and a humidity sensor 504.
The temperature sensor 502 is arranged at the outdoor fresh air inlet 404 and is used for CO 2 The sensor 503 and the humidity sensor 504 are arranged at the indoor air outlet 407, and the three sensors are all in signal connection with the controller 501.
A controller 501 is disposed in the indoor air discharging passage, and is in signal connection with the third damper 403, the heat pump system, the outdoor fresh air introduction system, and the indoor air discharging system, to control their operations.
According to the difference of air treatment contents in the outdoor fresh air introducing system, the work of the heat pump system can be divided into: a cooling mode; heating mode; dehumidification + no heat recovery mode; dehumidification+partial heat recovery mode; dehumidification + total heat recovery mode.
When the CO is arranged at the indoor air outlet 407 2 The sensor 503 and the humidity sensor 504 detect indoor CO 2 When the concentration is higher, humidity is lower, indicate that indoor fresh air needs to be introduced:
(1) If the temperature sensor 502 arranged at the outdoor fresh air inlet 404 detects that the temperature is higher, the fresh air needs to be cooled, the heat pump system works in a refrigeration mode, namely, high-temperature and high-pressure refrigerant gas compressed by the compressor 101 flows to the electromagnetic valve 111 and the heat exchanger 113 through the c-port of the four-way valve 102, the refrigerant throttled by the throttle valve 114 flows into the heat exchanger 131 through the connecting pipe 115 and the connecting pipe 130 to evaporate, the temperature of the fresh air is reduced, and the warmed refrigerant returns to the compressor 101 from the connecting pipe 132 and the muffler 133. In the cooling mode, the electromagnetic valve 121 is closed, the first fan 203 of the outdoor fresh air intake system and the second fan 302 of the indoor air exhaust system are opened to operate, the third air valve 403 on the intermediate partition 402 is closed, and the first air valve 201 of the outdoor fresh air intake system and the second air valve 301 of the indoor air exhaust system are opened.
(2) If the temperature sensor 502 arranged at the outdoor fresh air inlet 404 detects that the temperature is lower, the fresh air needs to be heated, and the heat pump system works in a heating mode, namely, high-temperature and high-pressure refrigerant gas compressed by the compressor 101 flows to the heat exchanger 131 through the e-port of the four-way valve 102, flows to the throttle valve 114 through the connecting pipe 130 and the connecting pipe 115, flows to the heat exchanger 113 after being throttled by the throttle valve 114, is evaporated, and the refrigerant after evaporation and cooling flows to the four-way valve 102 through the electromagnetic valve 111, the connecting pipe 110 and the connecting pipe 103 and returns to the compressor 101 through the air return pipe 133. In the heating mode, the electromagnetic valve 121 is closed, the first fan 203 of the outdoor fresh air intake system and the second fan 302 of the indoor air exhaust system are opened, the third air valve 403 on the intermediate partition 402 is closed, and the first air valve 201 of the outdoor fresh air intake system and the second air valve 301 of the indoor air exhaust system are opened.
(3) If the temperature sensor 502 arranged at the outdoor fresh air inlet 404 detects that the temperature is moderate, the fresh air does not need to be subjected to temperature rise and fall treatment, the heat pump system does not work, and in the working mode, the first fan 203 of the outdoor fresh air inlet system and the second fan 302 of the indoor air outlet system are started to work, the third air valve 403 on the middle partition plate 402 is closed, and the first air valve 201 of the outdoor fresh air inlet system and the second air valve 301 of the indoor air outlet system are opened.
When the CO is arranged at the indoor air outlet 407 2 The sensor 503 and the humidity sensor 504 detect indoor CO 2 When the concentration is lower and the humidity is higher, the fresh air can be not introduced into the room, at this time, the heat pump system works in the dehumidification and total heat recovery mode, namely, the high-temperature and high-pressure refrigerant gas compressed by the compressor 101 flows to the electromagnetic valve 121 and the heat exchanger 123 through the c port of the four-way valve 102, the refrigerant throttled by the throttle valve 125 flows into the heat exchanger 131 to evaporate through the connecting pipe 126 and the connecting pipe 130, the fresh air is dehumidified, and the refrigerant after the temperature rise returns to the compressor 101 from the connecting pipe 132 and the muffler 133. In the dehumidification mode, the electromagnetic valve 111 is closed, the first air valve 201 of the outdoor fresh air intake system and the second air valve 301 of the indoor air exhaust system are closed, the third air valve 403 on the middle partition plate 402 is opened, the first fan 203 of the outdoor fresh air intake system and the second fan 302 of the indoor air exhaust system are opened to work, fresh air is cooled and dehumidified by the heat exchanger 131 and then flows to the heat exchanger 123 to be heated, the heat pump system works according to the dehumidification and total heat recovery modes, and the whole heat pump fresh air system works according to the internal circulationThe air cleaning mode works.
When the CO is arranged at the indoor air outlet 407 2 The sensor 503 and the humidity sensor 504 detect indoor CO 2 When the concentration is higher, humidity is higher, the indoor fresh air that needs to be introduced is described:
(1) If the temperature sensor 502 arranged at the outdoor fresh air inlet 404 detects that the temperature is higher, the fresh air needs to be cooled and dehumidified, the heat pump system works in a dehumidification mode, namely, the high-temperature and high-pressure refrigerant gas compressed by the compressor 101 flows to the electromagnetic valve 111 and the heat exchanger 113 through the c port of the four-way valve 102, the refrigerant throttled by the throttle valve 114 flows into the heat exchanger 131 through the connecting pipe 115 and the connecting pipe 130 to evaporate, the temperature and the humidity of the fresh air are reduced, and the warmed refrigerant returns to the compressor 101 from the connecting pipe 132 and the air return pipe 133. In the dehumidification mode, the electromagnetic valve 121 is closed, the first fan 203 of the outdoor fresh air intake system and the second fan 302 of the indoor air exhaust system are opened to operate, the third air valve 403 on the middle partition plate 402 is closed, the first air valve 201 of the outdoor fresh air intake system and the second air valve 301 of the indoor air exhaust system are opened, the heat pump system operates in the dehumidification and no-heat recovery modes, and the whole heat pump fresh air system operates in the external circulation bidirectional flow mode.
(2) If the temperature sensor 502 arranged at the outdoor fresh air inlet 404 detects that the temperature is low, the fresh air needs to be dehumidified, and the dehumidified air needs to be subjected to the temperature-raising heat pump system to work in a dehumidification mode, namely, high-temperature and high-pressure refrigerant gas compressed by the compressor 101 flows to the electromagnetic valve 121 and the heat exchanger 123 through the c port of the four-way valve 102, the refrigerant throttled by the throttle valve 125 flows into the heat exchanger 131 through the connecting pipe 126 and the connecting pipe 130 to evaporate, the fresh air is dehumidified, and the warmed refrigerant returns to the compressor 101 from the connecting pipe 132 and the muffler 133. In the dehumidifying operation mode, the electromagnetic valve 111 is closed, the first air valve 201 of the outdoor fresh air intake system and the second air valve 301 of the indoor air exhaust system are closed, the third air valve 403 on the middle partition plate 402 is opened, the first fan 203 of the outdoor fresh air intake system and the second fan 302 of the indoor air exhaust system are opened to operate, fresh air is cooled and dehumidified by the heat exchanger 131 and then flows to the heat exchanger 123 to heat, the heat pump system operates in the dehumidifying and total heat recovery mode, and the whole heat pump fresh air system operates according to the external circulation bidirectional flow mode.
(3) If the temperature sensor 502 arranged at the outdoor fresh air inlet 404 detects that the temperature is moderate, the fresh air needs to be dehumidified, and the dehumidified fresh air properly heats the heat pump system to work in a dehumidification mode, namely, the high-temperature high-pressure refrigerant gas compressed by the compressor 101 is divided into two paths through the port c of the four-way valve 102 and the connecting pipe 103, and one path flows to the electromagnetic valve 121, the heat exchanger 123 and the throttle valve 125; the other path flows to the electromagnetic valve 111 and the heat exchanger 113 and passes through the throttle valve 114; the refrigerant having passed through the throttle valve 125 and the throttle valve 114 is collected in the connection pipe 130 via the connection pipe 126 and the connection pipe 115, flows into the heat exchanger 131, evaporates, dehumidifies fresh air, and returns to the compressor 101 from the connection pipe 132 and the return pipe 133. In this working mode, the electromagnetic valve 111 and the electromagnetic valve 121 are opened, the first air valve 201 of the outdoor fresh air intake system and the second air valve 301 of the indoor air exhaust system are opened, the third air valve 403 on the middle partition plate 402 is closed, the first fan 203 of the outdoor fresh air intake system and the second fan 302 of the indoor air exhaust system are opened to work, fresh air is cooled and dehumidified by the heat exchanger 131 and flows to the heat exchanger 123 to heat up and heat, the heat pump system works in the dehumidification and partial heat recovery mode, and the whole heat pump fresh air system works in the external circulation bidirectional flow mode.
Therefore, the heat pump system is controlled by the control system to work in different working modes, and the functions of dehumidification, heat recovery and the like can be realized.
Under the external circulation bidirectional flow working mode, if the outdoor environment temperature is lower, the heat of indoor exhaust air can be transferred to fresh air under the action of a refrigerant through the heat pump system, so that high-efficiency heat recovery is realized, and the system wind resistance is small. The heat pump system operates at a higher efficiency due to the relatively high indoor temperature.
In the external circulation bidirectional flow working mode, if the outdoor environment temperature is higher, the outdoor high-temperature fresh air can be cooled through the heat pump system. Because the indoor temperature is lower than the outdoor temperature, the heat pump system can realize better condensation, ensure the refrigerating effect at the fresh air side, ensure the fresh air conveyed into the room at a lower temperature level, maintain the indoor comfortable environment and realize the recovery of indoor exhaust air cooling capacity.
A second part: the invention relates to a control method of a heat pump fresh air system
Referring to fig. 1 and 2, the control method of the heat pump fresh air system of the present invention specifically includes:
step1: and (5) starting.
Step2: detecting the indoor relative humidity RH_test by a humidity sensor 504 at an indoor air outlet 407, and turning to Step10 if RH_test > RH_set; if RH_test is less than or equal to RH_set, turning to Step3.
RH_set is the indoor relative comfortable humidity, and the value is 60% -70%.
Step3: through CO at the indoor air outlet 407 2 Sensor 503 detects indoor CO 2 Concentration of CO of (2) 2 Test, if CO 2 _Test>CO 2 Set, go to Step5; if CO 2 _Test≤CO 2 Set, go to Step4.
CO 2 Set is CO relatively comfortable in the room 2 The concentration is generally 1000ppm.
Step4: the heat pump system does not work, the first air valve 201 of the outdoor fresh air introducing system and the second air valve 301 of the indoor air discharging system are closed, the third air valve 403 on the middle partition plate 402 is opened, the first fan 203 of the outdoor fresh air introducing system and the second fan 302 of the indoor air discharging system are opened to work, the whole heat pump fresh air system works in an internal circulation air purifying mode, and then Step9 is carried out.
Step5: detecting the outdoor fresh air temperature Tfa_test by a temperature sensor 502 at the outdoor fresh air inlet 404, and turning to Step6 if Tfa_test > Tfa_SetH; if Tfa_SetL < Tfa_test is less than or equal to Tfa_SetH, turning to Step7; if Tfa_test is less than or equal to Tfa_SetL, go to Step8.
Tfa_SetH is the highest set value of outdoor fresh air temperature, and the general value is 24-28 ℃.
Tfa_SetL is the lowest set value of outdoor fresh air temperature, and the value is 14-18 ℃.
Step6: the heat pump system works according to the fresh air side refrigeration mode, the first air valve 201 of the outdoor fresh air introducing system and the second air valve 301 of the indoor air discharging system are opened, the third air valve 403 on the middle partition plate 402 is closed, the first fan 203 of the outdoor fresh air introducing system and the second fan 302 of the indoor air discharging system are opened to work, and then Step9 is carried out.
Step7: the heat pump system does not work, the first air valve 201 of the outdoor fresh air intake system and the second air valve 301 of the indoor air exhaust system are opened, the third air valve 403 on the middle partition plate 402 is closed, the first fan 203 of the outdoor fresh air intake system and the second fan 302 of the indoor air exhaust system are opened, and then Step9 is performed.
Step8: the heat pump system works according to the fresh air side heating mode, the first air valve 201 of the outdoor fresh air introducing system and the second air valve 301 of the indoor air discharging system are opened, the third air valve 403 on the middle partition plate 402 is closed, the first air blower 203 of the outdoor fresh air introducing system and the second air blower 302 of the indoor air discharging system are opened, and then Step9 is carried out.
Step9: the controller 501 of the control system receives an on-off command of the heat pump fresh air system, and if the on-off command is not received, the process goes to Step2; if the shutdown command is received, the heat pump fresh air system is shut down.
Step10: through CO at the indoor air outlet 407 2 Sensor 503 detects indoor CO 2 Concentration of CO of (2) 2 Test, if CO 2 _Test>CO 2 Set, go to Step12; if CO 2 _Test≤CO 2 Set, go to Step11.
Step11: the heat pump system works according to the fresh air side internal circulation dehumidification mode, the first air valve 201 of the outdoor fresh air introducing system and the second air valve 301 of the indoor air discharging system are closed, the third air valve 403 on the middle partition plate 402 is opened, the first fan 203 of the outdoor fresh air introducing system and the second fan 302 of the indoor air discharging system are opened, the indoor air works according to the internal circulation, and the air dehumidified by the heat exchanger 131 is heated by the heat exchanger 123 to rise temperature, and then the Step9 is carried out.
Step12: detecting the outdoor fresh air temperature Tfa_test by a temperature sensor 502 at the outdoor fresh air inlet 404, and turning to Step13 if Tfa_test > Tfa_SetH; if Tfa_SetL < Tfa_test is less than or equal to Tfa_SetH, turning to Step14; if Tfa_test is less than or equal to Tfa_SetL, go to Step15.
Step13: the heat pump system works according to the fresh air side dehumidification and no heat recovery modes, the first air valve 201 of the outdoor fresh air introducing system and the second air valve 301 of the indoor air discharging system are opened, the third air valve 403 on the middle partition plate 402 is closed, the first fan 203 of the outdoor fresh air introducing system and the second fan 302 of the indoor air discharging system are opened to work, fresh air dehumidified and cooled by the heat exchanger 131 is purified and then conveyed into a room, and heat generated by dehumidification is brought outdoors through the heat exchanger 113 in the indoor air discharging channel, and then Step9 is carried out.
Step14: the heat pump system works according to the fresh air side dehumidification and partial heat recovery mode, the first air valve 201 of the outdoor fresh air introducing system and the second air valve 301 of the indoor air discharging system are opened, the third air valve 403 on the middle partition plate 402 is closed, the first fan 203 of the outdoor fresh air introducing system and the second fan 302 of the indoor air discharging system are opened to work, fresh air dehumidified and cooled by the heat exchanger 131 is heated and absorbed by the heat exchanger 123 and purified and then conveyed into a room, partial heat generated by dehumidification is brought outdoors through the heat exchanger 113 in the indoor air discharging channel, and the other part of heat is transferred to fresh air conveyed into the room through the heat exchanger 123 and then transferred to Step9.
Step15: the heat pump system works according to the fresh air side dehumidification and total heat recovery modes, the first air valve 201 of the outdoor fresh air introducing system and the second air valve 301 of the indoor air discharging system are opened, the third air valve 403 on the middle partition plate 402 is closed, the first fan 203 of the outdoor fresh air introducing system and the second fan 302 of the indoor air discharging system are opened to work, fresh air dehumidified and cooled by the heat exchanger 131 is heated and absorbed by the heat exchanger 123 and purified and then is conveyed into a room, heat generated by dehumidification is transferred to fresh air conveyed into the room by the heat exchanger 123, and then Step9 is carried out.
It should be noted that, the above embodiments are not intended to limit the present invention in any way, and all the technical solutions obtained by adopting equivalent substitution or equivalent transformation fall within the protection scope of the present invention.
Claims (1)
1. The control method of the heat pump fresh air system is characterized by comprising the following steps of: a housing (401), and a heat pump system, an outdoor fresh air introducing system, an indoor air discharging system and a control system which are arranged in the housing (401), wherein,
the shell (401) is separated into an outdoor fresh air circulation channel and an indoor air exhaust channel by a middle partition plate (402) with a third air valve (403), an outdoor fresh air inlet (404) and a fresh air outlet (405) are respectively arranged at two symmetrical ends of the outdoor fresh air circulation channel, and an outdoor air outlet (406) and an indoor air exhaust outlet (407) are respectively arranged at two symmetrical ends of the indoor air exhaust channel;
the outdoor fresh air introducing system is arranged in the outdoor fresh air circulating channel, the indoor air discharging system is arranged in the indoor air discharging channel, the compressor (101), the four-way valve (102) and the partial heat exchanger (113) of the heat pump system are arranged in the indoor air discharging channel and are positioned between the second fan (302) and the outdoor air outlet (406) of the indoor air discharging system, and the other partial heat exchangers (123, 131) of the heat pump system are arranged in the outdoor fresh air circulating channel and are positioned between the first fan (203) and the outdoor fresh air introducing port (404) of the outdoor fresh air introducing system;
the control system controls a third air valve (403), a heat pump system, an outdoor fresh air introducing system and an indoor air discharging system on the middle partition plate (402) by collecting and processing temperature data at an outdoor fresh air introducing port (404) and humidity data and CO2 concentration data at an indoor air discharging port (407);
the heat pump system includes: the system comprises a compressor (101), a four-way valve (102), electromagnetic valves (111, 121), heat exchangers (113, 123, 131), throttle valves (114, 125), a plurality of connecting pipes (103, 110, 112, 115, 120, 122, 124, 126, 130, 132) and an air return pipe (133), wherein a port d of the four-way valve (102) is connected with the compressor (101) through the connecting pipe, a port s is connected with the compressor (101) through the air return pipe (133), a port c is connected with one connecting pipe (103), the connecting pipe (103) is divided into two branches at the tail end, each branch is sequentially provided with the electromagnetic valves (111, 121), the heat exchangers (113, 123) and the throttle valves (114, 125), a first branch is arranged in an indoor air exhaust channel, a solenoid valve (121) of a second branch is arranged in an indoor air exhaust channel, a second branch heat exchanger (123) and the throttle valve (125) are arranged in an outdoor air exhaust channel, the two branches are connected with a third heat exchanger (131) positioned at the upstream of the second branch heat exchanger (123), and the third heat exchanger (131) is connected with a connecting pipe (102 e) through the four-way valve (132);
the air conditioner comprises a first air valve (201), a first filter screen (202), a first fan (203) and a purification combination unit (204), wherein the first air valve (201) and the first filter screen (202) are arranged at an outdoor fresh air inlet (404), the first filter screen (202) is positioned on the inner side, the first fan (203) and the purification combination unit (204) are arranged at a fresh air outlet (405), and the first fan (203) is positioned on the inner side;
the second air valve (301), the second fan (302) and the second filter screen (303), wherein the second air valve (301) is arranged at an outdoor air outlet (406), the second fan (302) and the second filter screen (303) are arranged at an indoor air outlet (407), and the second fan (302) is positioned on the inner side;
the device comprises a controller (501), a temperature sensor (502), a CO2 sensor (503) and a humidity sensor (504), wherein the temperature sensor (502) is arranged at an outdoor fresh air inlet (404), the CO2 sensor (503) and the humidity sensor (504) are arranged at an indoor air outlet (407), and the temperature sensor (502), the CO2 sensor (503) and the humidity sensor (504) are in signal connection with the controller (501);
the controller (501) is arranged in the indoor air exhaust channel;
the control method of the heat pump fresh air system is characterized by comprising the following steps of:
step1: starting up;
step2: detecting the indoor relative humidity RH_test by a humidity sensor (504) at an indoor air outlet (407), and turning to Step10 if RH_test > RH_set; if RH_test is less than or equal to RH_set, turning to Step3, wherein RH_set is indoor relative comfortable humidity;
step3: detecting the concentration of CO2 in the room by a CO2 sensor (503) at an indoor air outlet (407), and turning to Step5 if the concentration of CO2 in the room is CO2 Test > CO2 Set; if the CO2_test is less than or equal to the CO2_set, turning to Step4, wherein the CO2_set is the relatively comfortable CO2 concentration in the room;
step4: the heat pump system does not work, a first air valve (201) of the outdoor fresh air introducing system and a second air valve (301) of the indoor air discharging system are closed, a third air valve (403) on a middle partition plate (402) is opened, a first fan (203) of the outdoor fresh air introducing system and a second fan (302) of the indoor air discharging system are opened to work, and the whole heat pump fresh air system works to turn to Step9 after an internal circulation air purifying mode;
step5: detecting an outdoor fresh air temperature Tfa_test by a temperature sensor 502 at an outdoor fresh air inlet (404), and turning to Step6 if Tfa_test > Tfa_SetH; if Tfa_SetL < Tfa_test is less than or equal to Tfa_SetH, turning to Step7; if Tfa_test is less than or equal to Tfa_SetL, turning to Step8, wherein Tfa_SetH is the highest outdoor fresh air temperature set value, and Tfa_SetL is the lowest outdoor fresh air temperature set value;
step6: the heat pump system works according to a fresh air side refrigerating mode, a first air valve (201) of the outdoor fresh air introducing system and a second air valve (301) of the indoor air discharging system are opened, a third air valve (403) on an intermediate partition plate (402) is closed, a first fan (203) of the outdoor fresh air introducing system and a second fan (302) of the indoor air discharging system are opened to work, and then Step9 is carried out;
step7: the heat pump system does not work, a first air valve (201) of the outdoor fresh air introducing system and a second air valve (301) of the indoor air discharging system are opened, a third air valve (403) on a middle partition plate (402) is closed, a first fan (203) of the outdoor fresh air introducing system and a second fan (302) of the indoor air discharging system are opened, and then Step9 is turned;
step8: the heat pump system works according to a fresh air side heating mode, a first air valve (201) of the outdoor fresh air introducing system is opened, a second air valve (301) of the indoor air discharging system is opened, a third air valve (403) on an intermediate partition plate (402) is closed, a first fan (203) of the outdoor fresh air introducing system and a second fan (302) of the indoor air discharging system are opened, and then Step9 is carried out;
step9: a controller (501) of the control system receives an on-off command of the heat pump fresh air system, and if the on-off command is not received, the process goes to Step2; if the shutdown instruction is received, the heat pump fresh air system is shut down;
step10: detecting the concentration of CO2 in the room by a CO2 sensor (503) at an indoor air outlet (407), and turning to Step12 if the concentration of CO2 in the room is CO2 Test > CO2 Set; if the CO2_test is less than or equal to the CO2_Set, turning to Step11;
step11: the heat pump system works according to a fresh air side internal circulation dehumidification mode, a first air valve (201) of the outdoor fresh air introducing system and a second air valve (301) of the indoor air discharging system are closed, a third air valve (403) on a middle partition plate (402) is opened, a first fan (203) of the outdoor fresh air introducing system and a second fan (302) of the indoor air discharging system are opened, indoor air works according to internal circulation, and air dehumidified by the third heat exchanger (131) is heated and warmed by the second branch heat exchanger (123), and then Step9 is carried out;
step12: detecting the outdoor fresh air temperature Tfa_test by a temperature sensor (502) at the outdoor fresh air inlet (404), and turning to Step13 if Tfa_test > Tfa_SetH; if Tfa_SetL < Tfa_test is less than or equal to Tfa_SetH, turning to Step14; if Tfa_test is less than or equal to Tfa_SetL, turning to Step15;
step13: the heat pump system works according to a fresh air side dehumidification and no heat recovery mode, a first air valve (201) of the outdoor fresh air introducing system and a second air valve (301) of the indoor air discharging system are opened, a third air valve (403) on a middle partition plate (402) is closed, a first fan (203) of the outdoor fresh air introducing system and a second fan (302) of the indoor air discharging system are opened to work, fresh air dehumidified and cooled by a third heat exchanger (131) is purified and then conveyed into a room, and heat generated by dehumidification is brought outdoors through a heat exchanger (113) in an indoor air exhaust channel and then Step9 is carried out;
step14: the heat pump system works according to a fresh air side dehumidification and partial heat recovery mode, a first air valve (201) of the outdoor fresh air introducing system and a second air valve (301) of the indoor air discharging system are opened, a third air valve (403) on a middle partition plate (402) is closed, a first fan (203) of the outdoor fresh air introducing system and a second fan (302) of the indoor air discharging system are opened to work, fresh air dehumidified and cooled by a third heat exchanger (131) is heated by a second branch heat exchanger (123) and purified and then conveyed into a room, partial heat generated by dehumidification is brought outdoors by a third heat exchanger (113) in an indoor air exhaust channel, and the other part of heat is transferred to fresh air conveyed into the room by the second branch heat exchanger (123), and then Step9 is carried out;
step15: the heat pump system works according to a fresh air side dehumidification and total heat recovery mode, a first air valve (201) of the outdoor fresh air introducing system and a second air valve (301) of the indoor air discharging system are opened, a third air valve (403) on a middle partition plate (402) is closed, a first fan (203) of the outdoor fresh air introducing system and a second fan (302) of the indoor air discharging system are opened to work, fresh air dehumidified and cooled by a third heat exchanger (131) is heated by a second branch heat exchanger (123) and is purified and then is conveyed to a room, and heat generated by dehumidification is transferred to fresh air conveyed to the room by the second branch heat exchanger (123), and then Step9 is turned.
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| CN109000312B (en) * | 2018-06-08 | 2020-07-28 | 同济大学 | Integral heat pump heat recovery type fresh air dehumidifier with internal circulation mode |
| CN109114740A (en) * | 2018-07-11 | 2019-01-01 | 南京天加环境科技有限公司 | A kind of control method of heat pump fresh humidification system |
| CN110319616B (en) * | 2019-06-26 | 2021-03-05 | 上海理工大学 | Frostless type gas heat pump system |
| CN111397009A (en) * | 2020-03-27 | 2020-07-10 | 北京金茂绿建科技有限公司 | Energy-saving air-out temperature adjustable dehumidification system |
| CN114017867A (en) * | 2021-12-15 | 2022-02-08 | 北京威能通电气设备有限公司 | Intelligent environment control machine |
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| WO2012152199A1 (en) * | 2011-05-06 | 2012-11-15 | Rong Guohua | Air conditioning unit for heat recovery from heat pump |
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| CN101995062A (en) * | 2010-11-09 | 2011-03-30 | 帝思迈环境设备（上海）有限公司 | Total heat recovery humidifying fresh-air heat pump |
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| CN204665596U (en) * | 2015-05-29 | 2015-09-23 | 北京网电盈科科技发展有限公司 | Direct-expansion type heat-recycling air treatment device |
| CN106705298B (en) * | 2016-12-23 | 2022-07-01 | 南通华信中央空调有限公司 | Multi-connected fresh air conditioning unit with exhaust heat pump heat recovery function and heat exchange method |
| CN206420078U (en) * | 2016-12-26 | 2017-08-18 | 北京卡林新能源技术有限公司 | A kind of horizontal heat pump fresh air-changing device |
| CN207716607U (en) * | 2017-11-14 | 2018-08-10 | 科林贝思（深圳）科技有限公司 | A kind of heat pump fresh air system |
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Effective date of registration: 20230420 Address after: 518000 R & D building 202, Founder science and Technology Industrial Park, north of Songbai highway, Longteng community, Shiyan street, Bao'an District, Shenzhen City, Guangdong Province Applicant after: KELIN BEISI (SHENZHEN) TECHNOLOGY CO.,LTD. Applicant after: Collinbeth (Guangdong) Technology Co.,Ltd. Address before: 518108, 3rd Floor, Building A3, Fangzheng Science and Technology Park, Shiyan Street, Bao'an District, Shenzhen City, Guangdong Province Applicant before: KELIN BEISI (SHENZHEN) TECHNOLOGY CO.,LTD. |
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Denomination of invention: A heat pump fresh air system and its control method Granted publication date: 20230509 Pledgee: Agricultural Bank of China Limited Zhongshan triangle sub branch Pledgor: Collinbeth (Guangdong) Technology Co.,Ltd. Registration number: Y2024980009607 |