CN219222840U - Heat pump water heating system - Google Patents
Heat pump water heating system Download PDFInfo
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- CN219222840U CN219222840U CN202223110079.2U CN202223110079U CN219222840U CN 219222840 U CN219222840 U CN 219222840U CN 202223110079 U CN202223110079 U CN 202223110079U CN 219222840 U CN219222840 U CN 219222840U
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Abstract
The utility model relates to a heat pump hot water system, relates to the technical field of heat pump equipment, and is used for solving the problem that a refrigerant in the heat pump hot water system restricts the performance of the heat pump hot water system. Comprising the following steps: the heat exchange device is used for accommodating water to be exchanged; the high-temperature refrigerant system is partially arranged in the heat exchange device, and a high-temperature refrigerant is arranged in the high-temperature refrigerant system; the low-temperature refrigerant system is partially arranged in the heat exchange device, a low-temperature refrigerant is arranged in the low-temperature refrigerant system, and the system can start at least one of the high-temperature refrigerant system and the low-temperature refrigerant system according to the set target water temperature and the current environment temperature. The heat pump hot water system integrates two sets of refrigerant systems, plays the advantages of the high-temperature refrigerant system under the condition of high ambient temperature, absorbs heat in air and then exchanges heat with the water system, and improves the water temperature to a target temperature. Under the condition of low ambient temperature, the low-temperature refrigerant system and the high-temperature refrigerant system are operated in a combined mode, the condition that a compressor is operated in an out-of-range mode is avoided, and the heat pump hot water system can achieve an ideal working state.
Description
Technical Field
The utility model relates to the technical field of heat pump equipment, in particular to a heat pump hot water system.
Background
At present, a single refrigerant is generally used in a heat pump hot water system, and the actual operation process is easily influenced by the characteristics of the refrigerant, so that the performance of the heat pump hot water system is restricted, and even the heat pump system cannot normally operate when serious. Taking a high-temperature heat pump system using a high-temperature refrigerant as an example, the high-temperature refrigerant has good high-condensation temperature characteristics, but the evaporation characteristic of the low-temperature evaporation temperature is poor, the compression ratio caused by the high-condensation temperature and the low-evaporation temperature is large, and the normal operation range of the compressor is easily exceeded. Therefore, the heating capacity of the high-temperature heat pump hot water is drastically reduced at a low ambient temperature, and it is difficult to achieve an ideal working output state. Also, low temperature heat pump hot water systems using low temperature refrigerants have difficulty achieving the desired operating output conditions at high ambient temperatures.
That is, the refrigerant in the related art heat pump hot water system has a problem of restricting the performance thereof.
Disclosure of Invention
The utility model provides a heat pump water heating system, which is used for solving the problem that a refrigerant in the heat pump water heating system restricts the performance of the heat pump water heating system.
The utility model provides a heat pump water heating system, comprising: the heat exchange device is used for accommodating water to be exchanged; the high-temperature refrigerant system is partially arranged in the heat exchange device, and is internally provided with a high-temperature refrigerant, and the high-temperature refrigerant is used for carrying out heat exchange with water to be heat-exchanged so as to heat the water to be output to a first preset temperature; the low-temperature refrigerant system is partially arranged in the heat exchange device, and is internally provided with a low-temperature refrigerant, and the low-temperature refrigerant is used for carrying out heat exchange with water to be heat-exchanged so as to heat the water to be output to a second preset temperature; wherein the first preset temperature is higher than the second preset temperature, the heat pump water heating system can perform the heat pump water heating according to the set target water temperature and the current environment temperature, at least one of the high-temperature refrigerant system and the low-temperature refrigerant system is started to heat water to be output so as to meet the water demands of users at different temperatures.
In one embodiment, a cryogenic refrigerant system includes: the first condenser is arranged in the heat exchange device, and the low-temperature refrigerant in the first condenser is used for carrying out heat exchange with water to be heat-exchanged in the heat exchange device; the first electronic expansion valve is communicated with the outlet of the first condenser; and a first evaporator in communication with the first electronic expansion valve; and the inlet of the first compressor is communicated with the first evaporator, and the outlet of the first compressor is communicated with the inlet of the first condenser; the low-temperature refrigerant exchanges heat with water to be heat-exchanged in the heat exchange device through the first condenser so as to heat the water to be output to a second preset temperature.
In one embodiment, the low temperature refrigerant system further comprises a first gas-liquid separator, an inlet of the first gas-liquid separator is in communication with an outlet of the first evaporator, and an outlet of the first gas-liquid separator is in communication with an inlet of the first compressor.
In one embodiment, a high temperature refrigerant system includes: the high-temperature refrigerant in the second condenser is used for carrying out heat exchange with water to be output; the second electronic expansion valve is communicated with the outlet of the second condenser; the heat exchanger is arranged in the heat exchange device and is communicated with the second electronic expansion valve; the inlet of the second compressor is communicated with the heat exchanger, and the outlet of the second compressor is communicated with the inlet of the second condenser; the heat exchanger is used as a second evaporator so that high-temperature refrigerant in the heat exchanger evaporates and absorbs heat, and the high-temperature refrigerant exchanges heat with water to be output through the second condenser so as to heat the water to be output to a first preset temperature.
In one embodiment, the high temperature refrigerant system further comprises a second gas-liquid separator, an inlet of the second gas-liquid separator is in communication with an outlet of the second evaporator, and an outlet of the second gas-liquid separator is in communication with an inlet of the second compressor.
In one embodiment, the heat exchanger acts as a third condenser to release heat from the high temperature refrigerant therein, the high temperature refrigerant system further comprising: the inlet of the third evaporator is communicated with the outlet of the third condenser and the inlet of the second compressor, and the outlet of the third evaporator is communicated with the inlet of the third condenser; and the first control valve is arranged on a communicating pipe between the outlet of the third evaporator and the inlet of the third condenser and is used for controlling the on-off of the outlet of the third evaporator and the inlet of the third condenser.
In one embodiment, the high temperature refrigerant system further includes a second control valve and a conduction line, the second control valve is disposed on the communication line and located between the first control valve and the inlet of the third condenser, one end of the conduction line is connected to the communication line and located between the second control valve and the first control valve, and the other end of the conduction line is connected to the second electronic expansion valve, wherein the inlet of the third condenser can be conducted only with the outlet of the third evaporator by operating the first control valve and the second control valve, or the inlet of the second evaporator can be conducted only with the second electronic expansion valve.
In one embodiment, the high temperature refrigerant system has an air source heat exchange mode and a water side heat exchange mode, when the high temperature refrigerant system is in the air source heat exchange mode, the inlet of the third condenser is communicated with the outlet of the third evaporator and is not communicated with the second electronic expansion valve, and when the high temperature refrigerant system is in the water side heat exchange mode, the inlet of the second evaporator is communicated with the second electronic expansion valve and is not communicated with the outlet of the third evaporator.
In one embodiment, the heat exchange device has a water inlet end and a water outlet end, and the heat pump water heating system further comprises: the medium-temperature water tank is provided with a first water inlet and a first water outlet; the first water conveying pipeline is connected with the water inlet end and the first water outlet; the second water conveying pipeline is connected with the water outlet end and the first water inlet; the first water pump is arranged on the first water conveying pipeline or the second water conveying pipeline; the first water pump can pump water in the medium-temperature water tank into the heat exchange device for heating.
In one embodiment, the medium temperature water tank further has a second water inlet and a second water outlet, and the heat pump water heating system further comprises: the high-temperature water tank is provided with a water inlet and a water outlet; the third water conveying pipeline is connected with the second water outlet and the water inlet of the high-temperature water tank; the fourth water conveying pipeline is connected with the second water inlet and the water outlet of the high-temperature water tank; the second water pump is arranged on the third water conveying pipeline or the fourth water conveying pipeline; the second water pump can pump water in the medium-temperature water tank into the high-temperature water tank, and the second condenser is arranged in the high-temperature water tank.
Compared with the prior art, the utility model has the advantages that as the heat pump water heating system integrates the high-temperature refrigerant system and the low-temperature refrigerant system, namely, two sets of refrigerant systems are integrated, and two refrigerants are adopted, the heat pump water heating system can adapt to the water temperature requirement in a wide range. When the water temperature requirement is low, a single low-temperature refrigerant system can meet the user requirement. When the water temperature requirement is high, the advantages of the high-temperature refrigerant system are exerted under the condition of high ambient temperature, heat in the air is absorbed, heat exchange is further carried out with the water system, and the water temperature is increased to the target temperature. Under the condition of low ambient temperature, the low-temperature refrigerant system and the high-temperature refrigerant system are operated in a combined mode, the condition that a compressor is operated in an out-of-range mode is avoided, and meanwhile the heat pump hot water system can reach an ideal working state. Thereby ensuring the stable operation of the heat pump hot water system so as to provide high-temperature hot water for users stably and reliably. And further, the problem that the performance of the refrigerant in the hot water system of the heat pump in the related art is limited is avoided.
Drawings
The utility model will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of the specific structural composition of a heat pump water heating system (the arrow direction is the flow direction of the refrigerant) according to the embodiment of the utility model;
fig. 2 is a method flowchart of a control method of a heat pump hot water system according to an embodiment of the present utility model.
Reference numerals:
10. a high temperature refrigerant system; 11. a second electronic expansion valve; 12. a heat exchanger; 13. a second compressor; 14. a second gas-liquid separator; 15. a first control valve; 16. a second control valve; 17. a conducting line; 18. a third evaporator; 19. a first four-way valve; 20. a heat exchange device; 30. a low temperature refrigerant system; 31. a first electronic expansion valve; 32. a first evaporator; 33. a first compressor; 34. a first gas-liquid separator; 35. a second four-way valve; 40. a medium temperature water tank; 50. a first water transport line; 60. a second water transport line; 70. a first water pump; 80. a high temperature water tank; 90. a third water delivery line; 100. a fourth water delivery line; 110. and a second water pump.
Detailed Description
The utility model will be further described with reference to the accompanying drawings.
As shown in fig. 1, the present utility model provides a heat pump water heating system, which includes a heat exchange device 20, a high temperature refrigerant system 10 and a low temperature refrigerant system 30. The heat exchange device 20 is internally provided with water to be exchanged; and a high-temperature refrigerant system 10, partially disposed in the heat exchange device 20, in which a high-temperature refrigerant is disposed, the high-temperature refrigerant being used for heat exchange with water to be heat-exchanged so as to heat the water to be output to a first preset temperature; and a low-temperature refrigerant system part is arranged in the heat exchange device 20, and a low-temperature refrigerant is arranged in the low-temperature refrigerant, and is used for carrying out heat exchange with water to be heat-exchanged so as to heat the water to be output to a second preset temperature. The first preset temperature is higher than the second preset temperature, and the heat pump water heating system can start at least one of the high-temperature refrigerant system and the low-temperature refrigerant system to heat water to be output according to the set target water temperature and the current environment temperature so as to meet water use requirements of users at different temperatures.
In the above arrangement, since the heat pump water heating system integrates the high temperature refrigerant system 10 and the low temperature refrigerant system 30, i.e. two sets of refrigerant systems are integrated, and two refrigerants are adopted, the heat pump water heating system can adapt to a wide range of water temperature requirements. When the water temperature requirement is low (less than or equal to 40 ℃), a single low-temperature refrigerant system 30 can meet the user requirement. When the water temperature is required to be high (more than 40 ℃), the advantages of the high-temperature refrigerant system 10 are exerted under the condition of high ambient temperature (more than 10 ℃), heat in the air is absorbed, heat is further exchanged with the water system, and the water temperature is increased to the target temperature. Under the condition of low ambient temperature (less than or equal to 10 ℃), the low-temperature refrigerant system 30 and the high-temperature refrigerant system 10 are operated in a combined mode, the condition that a compressor is operated in an out-of-range mode is avoided, and meanwhile the heat pump hot water system can achieve an ideal working state. Thereby ensuring the stable operation of the heat pump hot water system so as to provide high-temperature hot water for users stably and reliably. And further, the problem that the performance of the refrigerant in the hot water system of the heat pump in the related art is limited is avoided.
It should be noted that the first preset temperature is a temperature range value, and the second preset temperature is a temperature range value. For example, the second preset temperature setting range is: [ a ℃, b ℃) and the first preset temperature setting range is as follows: (bdeg.C, c deg.C), where a < b < c.
It should be noted that, taking a common R410A, R a refrigerant as an example, R410a can adapt to-35 ℃ as a low-temperature refrigerant, and can provide hot water of about 80 ℃ under the condition of combined working with an R134A high-temperature refrigerant system.
It should be noted that, during heating operation, the heat source of the air source heat pump is air in the environment, the ambient temperature determines the evaporation pressure of the heat pump system, the water temperature determines the condensation pressure, the condensation pressure/evaporation temperature is the pressure ratio of the compressor, and the pressure ratio of the compressor cannot be too high, so that the energy efficiency and the service life of the compressor are affected by too high pressure ratio.
The parts in the heat pump hot water system are communicated through the communication pipeline.
Specifically, as shown in fig. 1, in one embodiment, the low temperature refrigerant system 30 includes a first condenser, a first electronic expansion valve 31, a first evaporator 32, and a first compressor 33. The first condenser is disposed in the heat exchange device 20, and the low-temperature refrigerant in the first condenser is used for heat exchange with water to be heat exchanged in the heat exchange device 20. The first electronic expansion valve 31 communicates with an outlet of the first condenser, the first evaporator 32 communicates with the first electronic expansion valve 31, an inlet of the first compressor 33 communicates with the first evaporator 32, and an outlet of the first compressor 33 communicates with an inlet of the first condenser. The low-temperature refrigerant is heat-exchanged with water to be heat-exchanged in the heat exchange device 20 through the first condenser to heat it to a second preset temperature.
Specifically, as shown in fig. 1, in one embodiment, the low temperature refrigerant system 30 further includes a first gas-liquid separator 34, an inlet of the first gas-liquid separator 34 is in communication with an outlet of the first evaporator 32, and an outlet of the first gas-liquid separator 34 is in communication with an inlet of the first compressor 33. The first gas-liquid separator 34 is used for gas-liquid separation of the refrigerant exiting from the first evaporator 32.
Specifically, as shown in fig. 1, in one embodiment, the low-temperature refrigerant system 30 further includes a second four-way valve 35, where the second four-way valve 35 is used to control on-off of the inlet of the first gas-liquid separator 34 and the outlet of the first evaporator 32. And the on-off of the outlet of the first compressor 33 with the inlet of the first condenser.
Specifically, as shown in fig. 1, in one embodiment, the high temperature refrigerant system 10 includes a second condenser, a second electronic expansion valve 11, a heat exchanger 12, and a second compressor 13. The high-temperature refrigerant in the second condenser is used for carrying out heat exchange with water to be output; and the second electronic expansion valve 11 is communicated with the outlet of the second condenser; and a heat exchanger 12 is provided in the heat exchange device and communicates with the second electronic expansion valve 11; the inlet of the second compressor 13 is in communication with the heat exchanger 12 and the outlet of the second compressor 13 is in communication with the inlet of the second condenser. The heat exchanger is used as a second evaporator so that the high-temperature refrigerant in the heat exchanger evaporates and absorbs heat, and the high-temperature refrigerant exchanges heat with water to be output through the second condenser so as to heat the water to be output to a first preset temperature.
Specifically, as shown in fig. 1, in one embodiment, the high temperature refrigerant system 10 further includes a second gas-liquid separator 14, an inlet of the second gas-liquid separator 14 is in communication with an outlet of the second evaporator, and an outlet of the second gas-liquid separator 14 is in communication with an inlet of the second compressor 13.
Specifically, as shown in fig. 1, in one embodiment, the high temperature refrigerant system 10 further includes a first four-way valve 19. The device is used for controlling the switching and on-off of the liquid path.
It should be noted that, the specific working principles of the high temperature refrigerant system 10 and the low temperature refrigerant system 30 are the prior art, and will not be described again.
Specifically, as shown in fig. 1, in one embodiment, the heat exchanger 12 serves as a third condenser to release heat from the high-temperature refrigerant therein, and the high-temperature refrigerant system further includes a third evaporator 18 and a first control valve 15, an inlet of the third evaporator 18 being in communication with an outlet of the third condenser and an inlet of the second compressor 13, and an outlet of the third evaporator 18 being in communication with an inlet of the third condenser. And the first control valve 15 is arranged on a communication pipeline between the outlet of the third evaporator 18 and the inlet of the third condenser and is used for controlling the on-off of the outlet of the third evaporator 18 and the inlet of the third condenser.
Specifically, as shown in fig. 1, in one embodiment, the high temperature refrigerant system 10 further includes a second control valve 16 and a conductive line 17, the second control valve 16 is disposed on the conductive line and located between the first control valve 15 and the inlet of the third condenser, one end of the conductive line 17 is connected to the conductive line and located between the second control valve 16 and the first control valve 15, and the other end of the conductive line 17 is connected to the second electronic expansion valve 11, wherein the inlet of the third condenser can be conducted only to the outlet of the third evaporator 18 or the inlet of the second evaporator can be conducted only to the second electronic expansion valve 11 by operating the first control valve 15 and the second control valve 16.
Specifically, as shown in fig. 1, in one embodiment, the hot-air system has an air source heat exchange mode and a water side heat exchange mode, when the hot-air system is in the air source heat exchange mode, the inlet of the third condenser is in communication with the outlet of the third evaporator 18 and is not in communication with the second electronic expansion valve 11, and when the hot-air system is in the water side heat exchange mode, the inlet of the second evaporator is in communication with the second electronic expansion valve 11 and is not in communication with the outlet of the third evaporator 18.
Specifically, as shown in fig. 1, in one embodiment, the heat exchange device 20 has a water inlet end and a water outlet end, and the heat pump hot water system further includes a medium temperature water tank 40, a first water delivery line 50, a second water delivery line 60, and a first water pump 70. Wherein, the first water delivery pipeline 50 is connected with the water inlet end and the first water outlet, and the second water delivery pipeline 60 is connected with the water outlet end and the first water inlet. The first water pump 70 is disposed in the first water delivery line 50. The first water pump 70 can pump the water circulating in the medium-temperature water tank 40 into the heat exchange device 20 for heating.
The first water pump 70 may be disposed on the second water delivery line 60 according to actual situations.
Specifically, as shown in fig. 1, in one embodiment, the intermediate temperature water tank 40 has a second water inlet and a second water outlet, and the heat pump water heating system further includes a high temperature water tank 80, a third water delivery line 90, a fourth water delivery line 100, and a second water pump 110. Wherein the high temperature water tank 80 has a water inlet and a water outlet; the third water delivery line 90 is connected with the second water outlet and the water inlet of the high-temperature water tank 80. The fourth water delivery line 100 is connected to the second water inlet and the water outlet of the high temperature water tank 80.
Specifically, as shown in fig. 1, in one embodiment, the second water pump 110 is disposed in the third water delivery line 90. The second water pump 110 can pump water in the medium-temperature water tank 40 into the high-temperature water tank 80, and the second condenser is provided in the high-temperature water tank 80.
The second water pump 110 may be disposed on the fourth water delivery line 100 according to practical situations.
It should be noted that, in addition to providing the high-temperature hot water to the user according to the requirement, the high-temperature disinfection and cleaning of the water tank (the high-temperature water tank 80 and the medium-temperature water tank 40) can be realized through the action of the water pump (the first water pump 70 and the second water pump 110), so that the experience of the user is improved. One side of the evaporator in the application can be provided with an axial flow fan for blowing air to the evaporator.
As shown in fig. 2, the utility model further provides a control method of the heat pump water heating system, and the control method is used for controlling the heat pump water heating system. The heat pump water heating system can start at least one of the high-temperature refrigerant system 10 and the low-temperature refrigerant system 30 according to the set target water temperature T1 (set output water temperature) and the current environment temperature T5 (the current external environment temperature where the heat pump water heating system is located), and exchange heat with water to be exchanged in the heat exchange device so as to heat the water to be output in the medium-temperature water tank or the high-temperature water tank. The control method comprises the following steps:
starting the heat pump hot water system;
inputting a set temperature value;
wherein, the set temperature values include a set target water temperature T1 (abbreviated as target water temperature T1), a set high water temperature value T2 (abbreviated as high water temperature value T2), a set low water temperature value T3 (abbreviated as low water temperature value T3) and a set low ambient temperature value T4 (abbreviated as low ambient temperature value T4);
it should be noted that the high water temperature value T2 is set within the first preset temperature, and the low water temperature value T3 is set within the second preset temperature. For example, the high water temperature value T2 is set within [ a ℃, b ℃) and the low water temperature value T3 is set within (b ℃, c ℃).
Detecting a current temperature value;
the current temperature value comprises a current environment temperature T5, a current medium-temperature water tank temperature T6 and a current high-temperature water tank temperature T7;
judging whether the target water temperature T1 is smaller than a low water temperature value T3 or not;
if the target water temperature T1 is smaller than the low water temperature value T3, starting a low-temperature refrigerant system to enter a first low-temperature heating program;
the method comprises the steps of detecting a current temperature value after a first low-temperature heating program is executed;
if the target water temperature T1 is not smaller than the low water temperature value T3, entering a next judging program;
judging whether the target water temperature T1 is larger than a high water temperature value T2 or not;
if the target water temperature T1 is greater than the high water temperature value T2, entering a program for resetting the target water temperature (namely, exceeding the running range of the unit and resetting the target water temperature);
if the target water temperature T1 is not greater than the high water temperature value T2, entering a next judging program;
judging whether the current ambient temperature T5 is smaller than a low ambient temperature value T4 or not;
if the current ambient temperature T5 is smaller than the low ambient temperature value T4, the low-temperature refrigerant system is started to enter a second low-temperature heating program.
After the second low-temperature heating program is executed, entering a high-temperature heating program;
and after the high-temperature heating program is executed, returning to the step of detecting the current temperature value. Specifically, as shown in fig. 1, in one embodiment, the first cryogenic heating process comprises the steps of:
starting a low-temperature refrigerant system;
heating the medium-temperature water tank, and detecting the current temperature T6 of the medium-temperature water tank;
judging whether the current medium-temperature water tank temperature T6 is smaller than the target water temperature T1 or not;
if the current medium-temperature water tank temperature T6 is smaller than the target water temperature T1, returning to the previous step until the current medium-temperature water tank temperature T6 is not smaller than the target water temperature T1;
if the current medium-temperature water tank temperature T6 is not smaller than the target water temperature T1, the medium-temperature water tank is automatically supplemented with water to maintain the target water temperature T1.
The medium-temperature water tank 40 in the present application has an automatic water replenishing function, and can be supplied with water from the outside.
Specifically, as shown in fig. 2, in one embodiment, the second cryogenic heating process comprises the steps of:
starting a low-temperature refrigerant system;
heating the medium-temperature water tank, and detecting the current temperature T6 of the medium-temperature water tank;
judging whether the current medium-temperature water tank temperature T6 is smaller than a low-temperature water value T3-a or not;
wherein a is a predetermined value;
if the current medium-temperature water tank temperature T6 is smaller than the low-temperature value T3-a, returning to the step of starting the low-temperature refrigerant system;
if the current medium-temperature water tank temperature T6 is not less than the low-temperature water value T3-a, entering a high-temperature heating program.
When the ambient temperature is low and the set water temperature is high, the high-temperature refrigerant system is independently started at the moment to enable the pressure ratio to be too large, the high-temperature refrigerant system absorbs heat from the medium-temperature water tank (the water temperature is more than the ambient temperature) to reduce the pressure ratio of the high-temperature refrigerant system, so that the water temperature of the medium-temperature water tank cannot be too low, on one hand, the water in the water tank is prevented from freezing, and on the other hand, the evaporation temperature of the high-temperature refrigerant system is reduced and the pressure ratio is increased due to the low water temperature of the medium-temperature water tank. Therefore, the water temperature of the medium-temperature water tank needs to be judged first, the low-temperature refrigerant system is started first when the water temperature is low, and the high-temperature refrigerant system is started directly when the water temperature is high.
Specifically, as shown in fig. 1, in one embodiment, the hot refrigerant system 10 has a water side heat exchange mode, and the hot heating process includes the steps of:
starting a high-temperature refrigerant system, and executing a water side heat exchange mode;
heating the high-temperature water tank, and detecting the current high-temperature water tank temperature T7;
judging whether the current high-temperature water tank temperature T7 is smaller than the target water temperature T1 or not;
if the current high water tank temperature T7 is smaller than the target water temperature T1, returning to the previous step until the current high water tank temperature T7 is not smaller than the target water temperature T1;
if the current temperature T7 of the high-temperature water tank is not less than the target water temperature T1, the high-temperature water tank is automatically supplemented with water to maintain the target water temperature T1.
The high-temperature water tank 80 in the present application has an automatic water replenishing function, and can be supplied with water from the outside.
Specifically, as shown in fig. 1, in one embodiment, the high temperature refrigerant system 10 has an air source heat exchange mode, and if the current ambient temperature T5 is not less than the low ambient temperature value T4, the high temperature refrigerant system is started to execute the air source heat exchange mode.
Specifically, as shown in fig. 2, in one embodiment, after the step of executing the air source heat exchange mode is completed after the high temperature refrigerant system is started, the method further includes the following steps:
heating the high-temperature water tank, and detecting the current high-temperature water tank temperature T7;
judging whether the current high-temperature water tank temperature T7 is smaller than the target water temperature T1 or not;
if the current high water tank temperature T7 is smaller than the target water temperature T1, returning to the previous step until the current high water tank temperature T7 is not smaller than the target water temperature T1;
if the current temperature T7 of the high-temperature water tank is not less than the target water temperature T1, the high-temperature water tank is automatically replenished with water to maintain the target water temperature T1;
returning to the step of detecting the current temperature value.
The heat pump water heating system and the control method thereof can accurately control temperature, save energy and be efficient. And the operation mode is switched to realize hot water supply by judging the states of the target water temperature and the current environment temperature. Therefore, the different water temperature requirements of users are met greatly, and compared with a common single-stage compression circulation system, the heat pump water heating system has the advantage of wide application range of the cascade system (the heat pump water heating system in the application), provides a heat source with a wider range, and has important application objections to areas with large latitude span and large environmental temperature change.
While the utility model has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present utility model is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (10)
1. A heat pump water heating system, comprising:
the heat exchange device is used for accommodating water to be exchanged; and
the high-temperature refrigerant system is partially arranged in the heat exchange device, and is internally provided with a high-temperature refrigerant, and the high-temperature refrigerant is used for performing heat exchange with the water to be subjected to heat exchange so as to heat the water to be output to a first preset temperature; and
the low-temperature refrigerant system is partially arranged in the heat exchange device, and is internally provided with a low-temperature refrigerant, and the low-temperature refrigerant is used for performing heat exchange with the water to be subjected to heat exchange so as to heat the water to be outputted to a second preset temperature;
the heat pump water heating system comprises a high-temperature refrigerant system, a low-temperature refrigerant system, a heat pump water heating system and a heat pump water heating system, wherein the first preset temperature is higher than the second preset temperature, and the heat pump water heating system can start at least one of the high-temperature refrigerant system and the low-temperature refrigerant system to heat water to be output according to set target water temperature and current environment temperature so as to meet water demands of users with different temperatures.
2. The heat pump water heating system according to claim 1, wherein the low temperature refrigerant system comprises:
the low-temperature refrigerant in the first condenser is used for carrying out heat exchange with water to be heat-exchanged in the heat exchange device; and
the first electronic expansion valve is communicated with the outlet of the first condenser; and
a first evaporator communicated with the first electronic expansion valve; and
a first compressor having an inlet in communication with the first evaporator and an outlet in communication with the inlet of the first condenser;
the low-temperature refrigerant exchanges heat with water to be heat-exchanged in the heat exchange device through the first condenser so as to heat the water to be output to the second preset temperature.
3. The heat pump water heating system according to claim 2, wherein the low temperature refrigerant system further comprises a first gas-liquid separator, an inlet of the first gas-liquid separator being in communication with an outlet of the first evaporator, an outlet of the first gas-liquid separator being in communication with an inlet of the first compressor.
4. The heat pump water heating system according to claim 1, wherein the high temperature refrigerant system comprises:
the high-temperature refrigerant in the second condenser is used for carrying out heat exchange with the water to be output; and
the second electronic expansion valve is communicated with the outlet of the second condenser; and
the heat exchanger is arranged in the heat exchange device and is communicated with the second electronic expansion valve; and
a second compressor, an inlet of which is communicated with the heat exchanger, and an outlet of which is communicated with an inlet of the second condenser;
the heat exchanger is used as a second evaporator so that the high-temperature refrigerant in the heat exchanger evaporates and absorbs heat, and the high-temperature refrigerant exchanges heat with the water to be output through the second condenser so as to heat the water to be output to the first preset temperature.
5. The heat pump water heating system according to claim 4, wherein the high temperature refrigerant system further comprises a second gas-liquid separator, an inlet of the second gas-liquid separator being in communication with an outlet of the second evaporator, an outlet of the second gas-liquid separator being in communication with an inlet of the second compressor.
6. The heat pump water heating system according to claim 4, wherein the heat exchanger acts as a third condenser to reject heat from the high temperature refrigerant therein, the high temperature refrigerant system further comprising:
a third evaporator, an inlet of which is communicated with an outlet of the third condenser and an inlet of the second compressor, and an outlet of which is communicated with an inlet of the third condenser; and
and the first control valve is arranged on a communicating pipe between the outlet of the third evaporator and the inlet of the third condenser and is used for controlling the on-off of the outlet of the third evaporator and the inlet of the third condenser.
7. The heat pump water heating system according to claim 6, wherein the high temperature refrigerant system further comprises a second control valve provided on the communication line between the first control valve and the inlet of the third condenser, and a conduction line having one end connected to the communication line and between the second control valve and the first control valve, and the other end connected to the second electronic expansion valve, wherein the inlet of the third condenser can be conducted only to the outlet of the third evaporator or the inlet of the second evaporator can be conducted only to the second electronic expansion valve by operating the first control valve and the second control valve.
8. The heat pump water heating system according to claim 7, wherein the high temperature refrigerant system has an air source heat exchange mode and a water side heat exchange mode, the inlet of the third condenser is in communication with the outlet of the third evaporator and is not in communication with the second electronic expansion valve when the high temperature refrigerant system is in the air source heat exchange mode, and the inlet of the second evaporator is in communication with the second electronic expansion valve and is not in communication with the outlet of the third evaporator when the high temperature refrigerant system is in the water side heat exchange mode.
9. The heat pump water heating system according to claim 4, wherein the heat exchange device has a water inlet end and a water outlet end, the heat pump water heating system further comprising:
the medium-temperature water tank is provided with a first water inlet and a first water outlet; and
the first water conveying pipeline is connected with the water inlet end and the first water outlet; and
the second water conveying pipeline is connected with the water outlet end and the first water inlet; and
the first water pump is arranged on the first water conveying pipeline or the second water conveying pipeline;
the first water pump can pump water in the medium-temperature water tank into the heat exchange device for heating.
10. The heat pump water heating system of claim 9, wherein the medium temperature tank further has a second water inlet and a second water outlet, the heat pump water heating system further comprising:
the high-temperature water tank is provided with a water inlet and a water outlet; and
the third water conveying pipeline is connected with the second water outlet and the water inlet of the high-temperature water tank; and
the fourth water conveying pipeline is connected with the second water inlet and the water outlet of the high-temperature water tank; and
the second water pump is arranged on the third water conveying pipeline or the fourth water conveying pipeline;
the second water pump can pump water in the medium-temperature water tank into the high-temperature water tank, and the second condenser is arranged in the high-temperature water tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223110079.2U CN219222840U (en) | 2022-11-22 | 2022-11-22 | Heat pump water heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223110079.2U CN219222840U (en) | 2022-11-22 | 2022-11-22 | Heat pump water heating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219222840U true CN219222840U (en) | 2023-06-20 |
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ID=86757035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223110079.2U Active CN219222840U (en) | 2022-11-22 | 2022-11-22 | Heat pump water heating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219222840U (en) |
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2022
- 2022-11-22 CN CN202223110079.2U patent/CN219222840U/en active Active
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