CN215177129U - Air conditioning system with plate heat exchanger - Google Patents
Air conditioning system with plate heat exchanger Download PDFInfo
- Publication number
- CN215177129U CN215177129U CN202023322797.7U CN202023322797U CN215177129U CN 215177129 U CN215177129 U CN 215177129U CN 202023322797 U CN202023322797 U CN 202023322797U CN 215177129 U CN215177129 U CN 215177129U
- Authority
- CN
- China
- Prior art keywords
- heat exchanger
- plate heat
- sensor
- air conditioning
- temperature
- 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.)
- Active
Links
Images
Landscapes
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to the field of air conditioning systems, in particular to an air conditioning system with a plate type heat exchanger. An air conditioning system with a plate heat exchanger comprises the plate heat exchanger, wherein a refrigerant channel and a secondary refrigerant channel which can generate heat exchange are formed inside the plate heat exchanger; the inlet end and the outlet end of the secondary refrigerant channel are respectively provided with a water inlet sensor and a water outlet sensor for detecting the water temperature; and the side wall of the plate heat exchanger is connected with an electric heating module, and the electric heating module controls the start and stop based on the feedback information of the water inlet sensor and/or the water outlet sensor. This air conditioning system can directly heat plate heat exchanger through electric heating module, and need not to improve plate heat exchanger's inside temperature through the unit operation, has simple structure, prevents frostbite the lower advantage of control cost.
Description
Technical Field
The utility model relates to an air conditioning system field especially relates to an air conditioning system with plate heat exchanger.
Background
The prior plate heat exchanger has high heat transfer efficiency and is widely applied to various fields; however, since the plate heat exchanger has a small internal volume and is easily frozen, substances which can lower the freezing point of the coolant, such as glycol solution, are conventionally added to the coolant, but due to the slight toxicity and cost of such additives, the conditions for adding low-temperature solution, such as glycol, are not provided in many cases. Therefore, the anti-freezing problem of the plate heat exchanger is solved, and the anti-freezing device has important significance.
Because the plate trades the water side runner a lot of, and each way volume is less, when the velocity of water is on the low side, can cause local area to freeze, slightly freeze, cause the runner to warp, and multiple accumulation also can cause the plate to trade interior hourglass, influences the reliability. In a traditional air conditioning system with a plate heat exchanger, the temperature of inlet water and the temperature of outlet water (secondary refrigerant is generally water) entering the plate heat exchanger are generally detected, and the unit is adjusted based on the detection result; the common mode is that the unit is started to enter a heating mode when the detected temperature is too low, and the scheme has high energy consumption and is generally only used when the detected temperature is very low, but is not suitable for being used when the temperature is low.
In addition, based on the operation principle of the air conditioning system with the plate heat exchanger, the plate heat exchanger is used as an evaporator in a refrigeration scene, and the inlet of the evaporator is in a throttled gas-liquid two-phase state without pressure drop of the evaporator, so that the temperature is higher than the saturation temperature in the evaporator; the temperature at the evaporator outlet is also higher than the evaporation temperature due to the superheat. Therefore, the lowest temperature point of the heat exchange area cannot be intuitively reflected only by detecting the water inlet temperature and the water outlet temperature.
Disclosure of Invention
In order to solve the problem, an object of the utility model is to provide an air conditioning system with plate heat exchanger, this air conditioning system can directly heat plate heat exchanger through electric heating module, and need not to improve plate heat exchanger's inside temperature through the unit operation, has simple structure, and the lower advantage of control cost prevents frostbite.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an air conditioning system with a plate heat exchanger comprises the plate heat exchanger, wherein a refrigerant channel and a secondary refrigerant channel which can generate heat exchange are formed inside the plate heat exchanger; the inlet end and the outlet end of the secondary refrigerant channel are respectively provided with a water inlet sensor and a water outlet sensor for detecting the water temperature; the method is characterized in that: and the side wall of the plate heat exchanger is connected with an electric heating module, and the electric heating module controls the start and stop based on the feedback information of the water inlet sensor and/or the water outlet sensor.
The above technical scheme is adopted in the utility model, this technical scheme relates to an air conditioning system with plate heat exchanger, is equipped with the sensor of intaking that is used for detecting into water temperature on the plate heat exchanger among this air conditioning system to and be used for detecting out the water temperature's play water sensor. On the basis, the air conditioning system is different from the prior art, the side wall of the plate type heat exchanger is connected with the electric heating module, and the start and stop of the electric heating module can be controlled based on the feedback information of the water inlet sensor and/or the water outlet sensor.
By adopting the structure, the scheme can directly heat the plate heat exchanger through the electric heating module without increasing the internal temperature of the plate heat exchanger through the operation of the unit, and has the advantages of simple structure and lower anti-freezing control cost.
Preferably, the circumferential side walls of the plate heat exchangers are connected with electric heating modules. Among this technical scheme, the preferred scheme is that all wrap up electric heating in plate heat exchanger's side all around, so can each water side runner area of even heating, can prevent that the stagnant water district from freezing.
Preferably, the plate heat exchanger is further provided with an anti-freezing sensor, and the anti-freezing sensor is used for detecting the lowest temperature of the refrigerant in the refrigerant channel; the electric heating module controls starting and stopping based on feedback information of the water inlet sensor and/or the water outlet sensor and/or the anti-freezing sensor. As described in the background art, when the plate heat exchanger is used in a refrigeration scene, the plate heat exchanger serves as an evaporator, and the inlet of the evaporator is throttled and then has a gas-liquid two-phase state without pressure drop of the evaporator, so that the temperature is higher than the saturation temperature inside the evaporator; the temperature at the evaporator outlet is also higher than the evaporation temperature due to the superheat. Therefore, the lowest temperature point of the heat exchange area cannot be intuitively reflected only by detecting the water inlet temperature and the water outlet temperature. Therefore, the plate heat exchanger is also provided with an anti-freezing sensor which is used for detecting the lowest temperature of the refrigerant in the refrigerant channel; specifically, as the gas-liquid two-phase refrigerant flows in the evaporator, and because of the pressure drop, when the liquid refrigerant is evaporated to be in a gas state, the lowest point of the temperature of the refrigerant is obtained. Therefore, the anti-freezing sensor in the scheme only needs to ensure that the detection end of the anti-freezing sensor is connected with the refrigerant channel in which the refrigerant is gasified, and the temperature sensor is used as the most accurate control reference.
Preferably, the air conditioning system further comprises a compressor, a throttling component, an air side heat exchanger, a gas-liquid separator and a four-way reversing valve; two ends of a first pipeline which is sequentially connected with the gas-liquid separator and the compressor are respectively connected with a port a and a port c of the four-way reversing valve, two ends of a second pipeline which is sequentially connected with the air-side heat exchanger, the throttling component and the plate type heat exchanger are respectively connected with a port b and a port d of the four-way reversing valve, the port a of the four-way reversing valve can be communicated with one of the port b and the port d, and the port c of the four-way reversing valve can be communicated with the other of the port b and the port d.
Preferably, the first pipelines on both sides of the compressor are respectively provided with a high pressure sensor and a low pressure sensor. In the technical scheme, the refrigerant pressure in the refrigerant channel is monitored based on the high-pressure sensor and the low-pressure sensor, so that protective measures such as controlling the operation of the compressor can be started when the pressure is higher than a set pressure value or lower than the set pressure value.
An anti-freezing control method of an air conditioning system, which adopts the air conditioning system with the plate heat exchanger and can execute the following anti-freezing control method in winter:
when T ise< 5 ℃ and Ts1+2℃＜T1 and T2＜Ts1At +3 ℃, a water pump communicated with the secondary refrigerant channel runs discontinuously;
when T ise< 5 ℃ and T1 or T2≤Ts1At +2 ℃, an electric heating module on the plate heat exchanger is started and the water pump is closed until T1 and T2≥Ts1The electric heating module is closed at +5 ℃;
when T ise< 5 ℃ and T1 or T2≤Ts1And continuing for a period of time, starting the unit, and entering a heating mode until T1If the temperature is higher than 15 ℃, the winter anti-freezing mode is exited;
t in the above schemeeIs ambient temperature, Ts1Setting the temperature, T, for winter freeze protection1For detecting temperature, T, of water intake sensor2The detected temperature of the water outlet sensor.
The method is a winter anti-freezing control method, and the adoption of the winter anti-freezing control method can prevent the local area from being frozen and slightly frozen due to the low temperature of the secondary refrigerant in the plate heat exchanger under the condition of low ambient temperature in winter, so that the flow channel is deformed. In this case, the temperature T detected by the water inlet sensor1The detected temperature T of the water outlet sensor2Ambient temperature TeAnd a system-set winter freeze-proofing set temperature Ts1And (6) judging. At the temperature of the environmentDegree TeFor the triggering condition, the ambient temperature TeCan be detected by an ambient temperature sensor, and judges T under the condition of low ambient temperature1 、 T2And Ts1And performing the above steps as appropriate to adapt a less costly freeze protection method to different conditions.
An anti-freezing control method of an air conditioning system adopts the air conditioning system with the plate heat exchanger, and can execute the following refrigeration anti-freezing control method:
s1, when T is1 or T2 or T3＜Ts2And continuing for a period of time, judging whether a compressor in the air-conditioning system operates: if the compressor is not operated, S2 is executed; if the compressor is operated, S3 is performed;
s2, starting the electric heating module on the plate heat exchanger until T3 and T2＞Ts2Closing the electric heating module at +3 ℃;
s3, the unit enters a refrigeration temperature anti-freezing protection state, and the refrigeration water temperature is too low for protection times N + 1; after a while, judging S1 again until T3 and T2＞Ts2+3 ℃ and make the following statistical judgment:
if the refrigerating water temperature is too low and the accumulated times N is less than 3 within the specified time, the refrigerating and anti-freezing protection state is exited;
if the refrigerating water temperature is too low and the accumulated times N is more than or equal to 3 times within the specified time, entering a refrigerating anti-freezing protection state, alarming and stopping, and needing to shut down or reset after power failure;
t in the above schemes2Setting the temperature, T, for refrigeration1For detecting temperature, T, of water intake sensor2For detecting temperature, T, of water-outlet sensor3The detected temperature of the anti-freezing sensor.
The method is a refrigeration anti-freezing control method, and is an anti-freezing control method for the unit in a refrigeration mode state. By adopting the refrigeration anti-freezing control method, the phenomenon that the flow channel is deformed due to the fact that the local area is frozen and slightly frozen in the plate heat exchanger because the temperature of the secondary refrigerant is low in the refrigeration state can be prevented. This is achieved byIn the table, Ts2Setting the temperature, T, for refrigeration1For detecting temperature, T, of water intake sensor2For detecting temperature, T, of water-outlet sensor3The detected temperature of the anti-freezing sensor. The detection temperature of the anti-freezing sensor is the lowest point of the temperature of the refrigerant in the running state of the unit, so that the standards are the most accurate in sequence. When the unit does not operate, the unit can be directly heated by the electric heating module; when the unit operates, the triggering times of the refrigeration anti-freezing protection state are repeatedly counted for many times, and whether the unit is stopped for alarming is judged according to the times.
An anti-freezing control method of an air conditioning system adopts the air conditioning system with the plate heat exchanger, and can execute the following refrigeration low-pressure anti-freezing control method:
SS1, reporting the times M +1 of refrigeration anti-freezing low-pressure protection and protection state when the refrigeration mode is started, if P is less than 400kPa and the specified time is continued;
SS2, reporting the times M +1 of refrigeration anti-freezing low-pressure protection and protection state after the press runs for a specified time in the refrigeration mode, if P is less than 515kPa and the specified time is continued;
SS3, reporting the number of times of the refrigeration anti-freezing low-pressure protection state M +1 when the refrigeration mode is normally started, such as when P is less than 600kPa and lasts for a specified time;
SS4, stopping the compressor and the fan after the refrigeration anti-freezing low-pressure protection state appears, and accumulating and reporting the times M +1 of the refrigeration anti-freezing low-pressure protection state; when P is larger than or equal to 650kPa and the number of times M of the refrigeration anti-freezing low-pressure protection state is less than 3 within a specified time period, automatically resetting, automatically clearing faults and allowing the compressor to start; when the number M of times of the refrigeration anti-freezing low-pressure protection state is not less than 3 within a specified time period, manual reset is required;
p in the scheme is the detection pressure value of the low-pressure sensor.
The method is a refrigeration low-pressure anti-freezing control method which is different from other schemes, and the scheme is that the judgment is carried out by combining the running state of the unit based on the detection pressure value of a low-pressure sensor. When the unit operates, the triggering times of the refrigeration anti-freezing low-pressure protection state are repeatedly counted for many times, and whether the unit is stopped for alarming is judged according to the times.
Drawings
Fig. 1 is a first structural schematic diagram of a plate heat exchanger.
Fig. 2 is a structural schematic diagram ii of the plate heat exchanger.
Fig. 3 is a schematic diagram of an air conditioning system having a plate heat exchanger.
Fig. 4 is a schematic diagram of a cooling flow of the air conditioning system.
Fig. 5 is a schematic diagram of a heating process of the air conditioning system.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Example 1:
as shown in fig. 1 to 5, the present embodiment relates to an air conditioning system with a plate heat exchanger, which includes a plate heat exchanger 1, and a refrigerant channel and a secondary refrigerant channel capable of generating heat exchange are formed inside the plate heat exchanger 1. And a water inlet sensor 21 and a water outlet sensor 22 for detecting the water temperature are respectively arranged on the inlet end 11 and the outlet end 12 of the secondary refrigerant channel. The side wall of the plate heat exchanger 1 is connected with an electric heating module 13, and the electric heating module 13 controls starting and stopping based on feedback information of a water inlet sensor 21 and/or a water outlet sensor 22.
The above technical scheme is adopted in the utility model, this technical scheme relates to an air conditioning system with plate heat exchanger 1, is equipped with the sensor 21 that intakes that is used for detecting into water temperature on plate heat exchanger 1 among this air conditioning system to and be used for detecting out the play water sensor 22 of temperature degree. On the basis, the air conditioning system is different from the prior art, the electric heating module 13 is connected to the side wall of the plate heat exchanger 1, and the on-off of the electric heating module 13 can be controlled based on the feedback information of the water inlet sensor 21 and/or the water outlet sensor 22.
By adopting the structure, the plate heat exchanger 1 can be directly heated by the electric heating module 13 according to the scheme, the internal temperature of the plate heat exchanger 1 is not required to be increased by the operation of a unit, and the plate heat exchanger has the advantages of simple structure and lower anti-freezing control cost.
And the circumferential side walls of the plate heat exchanger 1 are connected with electric heating modules 13. Among this technical scheme, the preferred scheme is that all wrap up electric heating in plate heat exchanger 1's side all around, so can each water side runner area of even heating, can prevent that the stagnant water district from freezing.
The plate heat exchanger 1 is further provided with an anti-freezing sensor 23, and the anti-freezing sensor 23 is used for detecting the lowest temperature of the refrigerant in the refrigerant channel. The electric heating module 13 controls the start and stop based on the feedback information of the water inlet sensor 21 and/or the water outlet sensor 22 and/or the anti-freezing sensor 23. As described in the background art, the plate heat exchanger 1 is used as an evaporator in a refrigeration scene, and the inlet of the evaporator is throttled to form two phases of gas and liquid, and the two phases do not undergo pressure drop of the evaporator, so that the temperature of the evaporator is higher than the saturation temperature inside the evaporator. The temperature at the evaporator outlet is also higher than the evaporation temperature due to the superheat. Therefore, the lowest temperature point of the heat exchange area cannot be intuitively reflected only by detecting the water inlet temperature and the water outlet temperature. Therefore, in the scheme, the plate heat exchanger 1 is further provided with an anti-freezing sensor 23, and the anti-freezing sensor 23 is used for detecting the lowest temperature of the refrigerant in the refrigerant channel. Specifically, as the gas-liquid two-phase refrigerant flows in the evaporator, and because of the pressure drop, when the liquid refrigerant is evaporated to be in a gas state, the lowest point of the temperature of the refrigerant is obtained. Therefore, the anti-freezing sensor 23 in the scheme only needs to ensure that the detection end of the anti-freezing sensor is connected with the refrigerant channel in which the refrigerant is gasified, and the temperature sensor is used as the most accurate control reference.
The air conditioning system also comprises a compressor 3, a throttling component 4, a heat exchanger 5, a gas-liquid separator 6 and a four-way reversing valve 7. Two ends of a first pipeline which is sequentially connected with the gas-liquid separator 6 and the compressor 3 are respectively connected with a port a and a port c of the four-way reversing valve 7, two ends of a second pipeline which is sequentially connected with the heat exchanger 5, the throttling part 4 and the plate heat exchanger 1 are respectively connected with a port b and a port d of the four-way reversing valve 7, the port a of the four-way reversing valve 7 can be communicated with one of the port b and the port d, and the port c of the four-way reversing valve 7 can be communicated with the other of the port b and the port d.
And a high-pressure sensor 9 and a low-pressure sensor 10 are respectively arranged on the first pipelines at two sides of the compressor 3. In the technical scheme, the refrigerant pressure in the refrigerant channel is monitored based on the high-pressure sensor 9 and the low-pressure sensor 10, so that when the refrigerant pressure is higher than a set pressure value or lower than the set pressure value, protective measures can be started, such as controlling the operation of the compressor 3.
Referring to the schematic diagram of the refrigeration flow of the air conditioning system shown in fig. 4, at this time, the port a of the four-way reversing valve 7 is communicated with the port d, and the port b is communicated with the port c, the plate heat exchanger 1 in this scheme is used as an evaporator, and the heat exchanger 5 is used as a condenser. The refrigerant sent by the compressor is condensed in the heat exchanger 5 to become liquid refrigerant, and the liquid refrigerant is throttled to be in gas-liquid two phases and evaporated to be in a gaseous state in the plate heat exchanger 1; the gaseous refrigerant flows into the compressor after passing through the gas-liquid separator 6 to form a cycle.
Referring to the heating flow diagram of the air conditioning system shown in fig. 5, at this time, the port a of the four-way reversing valve 7 is communicated with the port b, and the port d is communicated with the port c; the plate heat exchanger 1 in this solution acts as a condenser and the heat exchanger 5 as an evaporator. The refrigerant sent out by the compressor is condensed in the plate heat exchanger 1 to become liquid refrigerant, and the liquid refrigerant is throttled to be in gas-liquid two phases and evaporated to be in a gaseous state in the heat exchanger 5; the gaseous refrigerant flows into the compressor after passing through the gas-liquid separator 6 to form a cycle.
Example 2:
the present embodiment relates to an antifreeze control method for an air conditioning system, which employs the air conditioning system having the plate heat exchanger 1 described in embodiment 1.
The air conditioning system can execute the following winter anti-freezing control method:
when T ise< 5 ℃ and Ts1+2℃＜T1 and T2＜Ts1And at +3 ℃, a water pump communicated with the secondary refrigerant channel runs for 5min every 35 min.
When T ise< 5 ℃ and T1 or T2≤Ts1At +2 ℃, the electric heating module 13 on the plate heat exchanger 1 is started and the water pump is closed until T1 and T2≥Ts1+5 ℃, the electrical heating module 13 is turned off.
When T ise< 5 ℃ and T1 or T2≤Ts1And continuing for 20s, starting the unit, and entering a heating mode until T1And if the temperature is higher than 15 ℃, the winter anti-freezing mode is exited.
T in the above schemeeIs ambient temperature, T1For detecting the temperature, T, of the water inlet sensor 212Is the detected temperature of the water outlet sensor 22; t iss1The temperature is set for winter anti-freezing, and the temperature range which can be generally set is between 2 ℃ and 6 ℃.
The method is a winter anti-freezing control method, and the adoption of the winter anti-freezing control method can prevent the local area from being frozen and slightly frozen due to the low temperature of the secondary refrigerant in the plate heat exchanger 1 under the condition of low ambient temperature in winter, so that the flow channel is deformed. In this case, the temperature T detected by the water inlet sensor 211The detected temperature T of the water outlet sensor 222Ambient temperature TeAnd a system-set winter freeze-proofing set temperature Ts1And (6) judging. At ambient temperature TeFor the triggering condition, the ambient temperature TeCan be detected by an ambient temperature sensor, and judges T under the condition of low ambient temperature1 、 T2And Ts1And performing the above steps as appropriate to adapt a less costly freeze protection method to different conditions.
2, the air conditioning system can execute the following refrigeration anti-freezing control method:
s1, when T is1 or T2 or T3＜Ts2And last for 5s, judging the air conditioning systemWhether the compressor 3 in (1) is operated: if the compressor 3 is not operated, S2 is executed. If the compressor 3 is operated, S3 is performed.
S2, starting the electric heating module 13 on the plate heat exchanger 1 until T3 and T2＞Ts2The electrical heating module 13 is turned off at +3 ℃.
And S3, the unit enters a refrigeration temperature anti-freezing protection state, and the refrigeration water temperature is too low for protection times N + 1. After 2min, judging S1 again until T3 and T2＞Ts2+3 ℃ and make the following statistical judgment:
if the refrigerating water temperature is too low and the protection is carried out within 1h, the accumulative times N are less than 3, and the refrigerating and anti-freezing protection state is exited.
If the refrigerating water temperature is too low and the protection is carried out within 1h, the accumulated times N is more than or equal to 3 times, the refrigerating anti-freezing protection state is entered, the alarm is given and the machine is stopped, and the machine must be shut down or reset after power failure.
T in the above scheme1For detecting the temperature, T, of the water inlet sensor 212For detecting the temperature, T, of the water outlet sensor 223The detected temperature of the antifreeze sensor 23; t iss2The temperature is set for refrigeration and freeze protection, and the temperature range which can be generally set is 2-5 ℃.
The method is a refrigeration anti-freezing control method, and is an anti-freezing control method for the unit in a refrigeration mode state. By adopting the refrigeration anti-freezing control method, the phenomenon that the flow channel is deformed due to the fact that the local area is frozen and slightly frozen in the plate heat exchanger 1 because the temperature of the secondary refrigerant is low can be prevented in a refrigeration state. In this case, Ts2Setting the temperature, T, for refrigeration1For detecting the temperature, T, of the water inlet sensor 212For detecting the temperature, T, of the water outlet sensor 223Is the detected temperature of the antifreeze sensor 23. The temperature detected by the anti-freezing sensor 23 is the lowest point of the temperature of the refrigerant in the unit operating state, and therefore the standard is the most accurate in sequence. When the unit is not operating, heating can be carried out directly by means of the electric heating module 13. When the unit operates, the triggering times of the refrigeration anti-freezing protection state are repeatedly counted for many times, and whether the unit is stopped for alarming is judged according to the times.
3, the air conditioning system can execute the following refrigeration low-pressure anti-freezing control method:
SS1, when the refrigeration mode is started, if P is less than 400kPa and lasts for 5s, reporting the times M +1 of the refrigeration anti-freezing low-pressure protection state.
SS2, reporting the number M +1 of the refrigeration anti-freezing low-pressure protection state if P is less than 515kPa and lasts for 30s after the press runs for a set time in the refrigeration mode.
SS3, reporting the number of times of the refrigeration anti-freezing low-pressure protection state M +1 when the refrigeration mode is normally started, such as when P is less than 600kPa and continues for 120 s.
And SS4, stopping the compressor 3 and the fan after the refrigeration anti-freezing low-pressure protection state appears, and reporting the times M +1 of the refrigeration anti-freezing low-pressure protection state in an accumulated mode. When P is larger than or equal to 650kPa and the number of times M of the refrigeration anti-freezing low-pressure protection state is less than 3 within 1h, the system is automatically reset, the fault is automatically cleared, and the compressor is allowed to start after 33 min. When the number M of times of the refrigeration anti-freezing low-pressure protection state is more than or equal to 3 within 1h, manual reset is required;
p in the above scheme is a detection pressure value of the low pressure sensor 10.
The method is a refrigeration low-pressure anti-freezing control method which is different from other schemes, and the scheme is that the judgment is carried out by combining the running state of the unit based on the detection pressure value of the low-pressure sensor 10. When the unit operates, the triggering times of the refrigeration anti-freezing low-pressure protection state are repeatedly counted for many times, and whether the unit is stopped for alarming is judged according to the times.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention.
Claims (5)
1. An air conditioning system with a plate heat exchanger comprises the plate heat exchanger (1), wherein a refrigerant channel and a secondary refrigerant channel which can generate heat exchange are formed inside the plate heat exchanger (1); the inlet end (11) and the outlet end (12) of the secondary refrigerant channel are respectively provided with a water inlet sensor (21) and a water outlet sensor (22) for detecting the water temperature; the method is characterized in that: the side wall of the plate type heat exchanger (1) is connected with an electric heating module (13), and the electric heating module (13) is controlled to be started and stopped based on feedback information of a water inlet sensor (21) and/or a water outlet sensor (22).
2. An air conditioning system with a plate heat exchanger according to claim 1, characterized in that: and the circumferential side walls of the plate heat exchangers (1) are connected with electric heating modules (13).
3. An air conditioning system with a plate heat exchanger according to claim 1, characterized in that: the plate heat exchanger (1) is also provided with an anti-freezing sensor (23), and the anti-freezing sensor (23) is used for detecting the lowest temperature of a refrigerant in the refrigerant channel; the electric heating module (13) controls starting and stopping based on feedback information of the water inlet sensor (21), the water outlet sensor (22) and/or the anti-freezing sensor (23).
4. An air conditioning system with a plate heat exchanger according to claim 3, characterized in that: the air conditioning system also comprises a compressor (3), a throttling component (4), a heat exchanger (5), a gas-liquid separator (6) and a four-way reversing valve (7); two ends of a first pipeline which is sequentially connected with the gas-liquid separator (6) and the compressor (3) are respectively connected with a port a and a port c of the four-way reversing valve (7), and two ends of a second pipeline which is sequentially connected with the heat exchanger (5), the throttling component (4) and the plate heat exchanger (1) are respectively connected with a port b and a port d of the four-way reversing valve (7); the port a of the four-way reversing valve (7) can be communicated with one of the port b and the port d, and the port c of the four-way reversing valve (7) can be communicated with the other of the port b and the port d.
5. An air conditioning system with a plate heat exchanger according to claim 4, characterized in that: and a high-pressure sensor (9) and a low-pressure sensor (10) are respectively arranged on the first pipelines at two sides of the compressor (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023322797.7U CN215177129U (en) | 2020-12-31 | 2020-12-31 | Air conditioning system with plate heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023322797.7U CN215177129U (en) | 2020-12-31 | 2020-12-31 | Air conditioning system with plate heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215177129U true CN215177129U (en) | 2021-12-14 |
Family
ID=79399458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023322797.7U Active CN215177129U (en) | 2020-12-31 | 2020-12-31 | Air conditioning system with plate heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215177129U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112728978A (en) * | 2020-12-31 | 2021-04-30 | 浙江中广电器股份有限公司 | Air conditioning system with plate heat exchanger and anti-freezing control method thereof |
-
2020
- 2020-12-31 CN CN202023322797.7U patent/CN215177129U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112728978A (en) * | 2020-12-31 | 2021-04-30 | 浙江中广电器股份有限公司 | Air conditioning system with plate heat exchanger and anti-freezing control method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20080229782A1 (en) | Refrigerating Apparatus | |
| US20120186284A1 (en) | Refrigerant system and method for controlling the same | |
| CN102538300B (en) | Air-cooling heat pump unit and anti-freezing method for plate heat exchanger | |
| EP2891849A1 (en) | Heat reclaim for a multifunction heat pump and a multifunction air conditioner | |
| CN107044692B (en) | Multi-split air conditioning system and defrosting control method and device thereof | |
| CN104833010A (en) | Outdoor unit of heat recovery VRF air conditioning system and heat recovery VRF air conditioning system | |
| JP5220045B2 (en) | Cooling system | |
| CN112728978A (en) | Air conditioning system with plate heat exchanger and anti-freezing control method thereof | |
| CN107965853B (en) | Outdoor unit of three-pipe multi-split air conditioner system and control method | |
| US11274851B2 (en) | Air conditioning apparatus | |
| CN215177129U (en) | Air conditioning system with plate heat exchanger | |
| EP3851764A1 (en) | Cooling system with flooded low side heat exchangers | |
| CN109177689A (en) | A kind of novel new-energy automobile heat pump air conditioning system | |
| KR101964946B1 (en) | temperature compensated cooling system high efficiency | |
| EP2375187A2 (en) | Heat pump apparatus and operation control method of heat pump apparatus | |
| KR100911218B1 (en) | Air conditioning system for communication equipment and controlling method thereof | |
| KR20180123271A (en) | Air conditioning system | |
| KR100911217B1 (en) | Air conditioning system for communication equipment and method for preventing frozen | |
| CN113154731A (en) | Three-pipe multi-split air conditioning system without defrosting shutdown | |
| KR20130135132A (en) | Heat pump type air conditioner | |
| CN212870024U (en) | Air conditioner | |
| CN219141148U (en) | Air conditioner | |
| KR20100062117A (en) | Air conditioner having plate heat exchanger and controlling method of the same of | |
| CN212511905U (en) | Refrigeration system | |
| KR101539498B1 (en) | Hybrid refrigerants system for preventing performance degradation of Heating/Cooling by defrosting process and Heating/Cooling system including the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 323000 No.96 Yunjing Road, Shuige Industrial Park, Lishui City, Zhejiang Province Patentee after: Zhejiang Zhongguang Electric Appliance Group Co.,Ltd. Address before: 323000 No.96 Yunjing Road, Shuige street, Liandu District, Lishui City, Zhejiang Province Patentee before: ZHEJIANG ZHONGGUANG ELECTRIC APPLIANCES Co.,Ltd. |
|
| CP03 | Change of name, title or address |