CN205316766U - Solar air source heat pump - Google Patents

Abstract

The utility model belongs to the technical field of heating and cooling, and provides a solar air source heat pump, comprising: a solar heat collector, an air source heat pump, a third liquid/liquid heat exchanger and a user side device; the solar heat collector is connected to The air source heat pump and the user-side device; the air source heat pump includes: a plurality of air-cooled heat exchangers and heat pump units; the plurality of air-cooled heat exchangers are connected to the heat pump unit through a first liquid pump , the heat pump unit is connected to the user-side device; the user-side device is connected to the plurality of air-cooled heat exchangers through the third liquid/liquid heat exchanger. Through the use of multiple air-cooled heat exchangers, the air-cooled heat exchangers that do not need to be defrosted are used to absorb the heat energy of the air, and the hot water is produced by the heat pump unit, which is passed into the air-cooled heat exchangers to be defrosted for defrosting, ensuring The reliability of defrosting is improved, and the effect of defrosting is improved. At the same time, the continuity of heating is guaranteed during defrosting.

Description

A solar air source heat pump

technical field

The utility model relates to the technical field of heating and cooling, in particular to a solar energy air source heat pump.

Background technique

With the shortage of energy and the enhancement of environmental protection awareness, the development and utilization of renewable energy has attracted much attention, and solar energy is a safe and clean renewable energy, which is widely used in the production of hot water. However, the use of solar energy is greatly affected by weather changes and is unstable. Traditional solar heating devices cannot use solar radiation at night, or in the case of weak solar radiation, due to the solar heat collection in solar water heating devices The heater leaks heat, and the temperature of hot water produced by the solar heating device cannot meet the user's needs.

The air source heat pump uses the working principle of the heat pump to produce high-temperature hot water by using the low-grade heat energy in the air, which has the advantages of being able to be used all year round and not affected by solar radiation. However, the performance of traditional air source heat pumps is affected by the evaporation temperature, and the energy efficiency is low when the ambient temperature is low. Moreover, in practical applications, there is a problem of frosting, especially in areas with low temperature and high humidity, and the frosting of outdoor air-cooled heat exchangers is particularly serious. The existing defrosting schemes include refrigerant reverse defrosting, thermal storage defrosting and residual heat defrosting. Refrigerant reverse defrosting and thermal storage defrosting will affect the heating effect on the user side during the defrosting process. Although frost will not affect the heating effect on the user side, it will reduce the primary energy usage efficiency of the air source heat pump, failing to achieve the purpose of energy saving and environmental protection.

An existing solar air source heat pump combines the air source heat pump with solar radiation organically, and uses solar collectors to produce hot water. When the solar radiation is sufficient, it can directly use solar radiation for heating, and when the solar radiation is insufficient, it can use air Source heat pump heating solves the problem of unstable solar radiation, but does not take advantage of weaker solar radiation. Therefore, the frosting problem of the air source heat pump when the temperature is low and the humidity is high has not been solved.

Another existing solar air source heat pump uses solar radiation to defrost the air source heat pump while using the air source heat pump for heating to make up for the instability of solar radiation. The defrosting principle is: when the ambient temperature is higher than 0°C , the solar collector directly produces hot water, and when the ambient temperature is lower than 0°C, connect the solar collector to the air source heat pump evaporator to defrost the air source heat pump. However, this method ignores the influence of solar radiation on the heating capacity of solar collectors, and does not use weaker solar radiation when defrosting is not required. Therefore, when solar radiation is weak or there is no solar radiation, the solar collector It is not possible to defrost an air source heat pump.

Another existing solar air source heat pump adds a branch circuit using hot water produced by the solar heat collector as the heat source of the heat pump, so as to defrost the air source heat pump using weaker solar radiation. However, the solar air source heat pump still uses solar radiation to defrost the air source heat pump, and the solar radiation is unstable, so the reliability and defrosting effect of the air source heat pump cannot be guaranteed.

Moreover, the existing solar air source heat pumps use heat exchangers to realize direct heating by solar radiation, so water pumps and pipelines matching the heat exchangers are required, which makes the solar air source heat pumps more complicated.

Utility model content

Aiming at the defects existing in the prior art, the utility model proposes a solar air source heat pump to solve the problem that the existing solar air source heat pump adopts the traditional air source heat pump defrosting method, or uses solar radiation to defrost the air source heat pump, which cannot be used in defrosting. Stable heating while frosting, poor defrosting effect, unable to guarantee the reliability of air source heat pump defrosting, and not making full use of weak solar radiation.

For this purpose, in the first aspect, the utility model provides a solar air source heat pump, comprising:

Solar collectors, air source heat pumps, third liquid/liquid heat exchangers, and user-side devices;

The solar heat collector is connected to the air source heat pump and the user-side device;

The air source heat pump includes: multiple air-cooled heat exchangers and heat pump units;

The plurality of air-cooled heat exchangers are connected to the heat pump unit, and the heat pump unit is connected to the user-side device;

The user-side device is connected to the plurality of air-cooled heat exchangers through the third liquid/liquid heat exchanger.

Wherein, the heat pump unit is a composite heat pump unit, including: a compressor, a three-way valve, a first liquid/liquid heat exchanger, a second liquid/liquid heat exchanger, a throttle valve, and a refrigerant valve;

The refrigerant outlet of the second liquid/liquid heat exchanger, the refrigerant inlet and refrigerant outlet of the compressor, the first port and the second port of the three-way valve, the first liquid/liquid heat exchanger The refrigerant inlet and refrigerant outlet of the heater, the refrigerant inlet and refrigerant outlet of the throttling valve, and the refrigerant inlet of the second liquid/liquid heat exchanger are connected in sequence;

The refrigerant outlet of the second liquid/liquid heat exchanger is connected to the third port of the three-way valve;

The refrigerant valve is connected in parallel with the throttle valve.

Wherein, the heat pump unit is a vapor compression heat pump unit, including: a compressor, a four-way valve, a first liquid/liquid heat exchanger, a second liquid/liquid heat exchanger, and a throttle valve;

The first liquid/liquid heat exchanger and the second liquid/liquid heat exchanger are connected to the compressor through the four-way valve;

The first liquid/liquid heat exchanger is connected to the second liquid/liquid heat exchanger through the throttle valve.

Wherein, the liquid outlet of the solar collector is connected to the brine inlet of the second liquid/liquid heat exchanger through the first liquid pump; the liquid outlet of the solar collector is connected to the first liquid A first valve is arranged between the pumps;

The liquid inlet of the solar heat collector is connected to the brine outlet of the second liquid/liquid heat exchanger through a second valve.

Wherein, the liquid outlets of the plurality of air-cooled heat exchangers are connected to the brine inlets of the second liquid/liquid heat exchangers through the first liquid pump; the liquid outlets of each air-cooled heat exchanger are connected to the A fifth valve is arranged between the first liquid pumps;

The liquid inlet of each air-cooled heat exchanger is connected to the brine outlet of the second liquid/liquid heat exchanger through a sixth valve.

Wherein, the solar air source heat pump also includes: a fourth liquid/liquid heat exchanger;

The solar heat collector is connected to the user-side device through the fourth liquid/liquid heat exchanger.

Wherein, the solar heat collector is connected to the user-side device through the fourth liquid/liquid heat exchanger, including:

A third valve and a fourth valve are respectively arranged between the liquid outlet and the liquid inlet of the solar heat collector and the fourth liquid/liquid heat exchanger;

A fourth liquid pump is arranged between the third valve and the fourth liquid/liquid heat exchanger;

A thirteenth valve and a fourteenth valve are respectively arranged between the liquid outlet and the liquid inlet of the user-side device and the fourth liquid/liquid heat exchanger;

The liquid outlet of the user-side device is connected to the thirteenth valve through the second liquid pump.

Wherein, the user-side device is connected to the plurality of air-cooled heat exchangers through the third liquid/liquid heat exchanger, including:

An eleventh valve and a twelfth valve are respectively arranged between the liquid outlet and the liquid inlet of the user-side device and the third liquid/liquid heat exchanger;

The liquid outlet of the user-side device is connected to the eleventh valve through the second liquid pump;

A seventh valve and an eighth valve are respectively arranged between the liquid outlet and the liquid inlet of each air-cooled heat exchanger and the third liquid/liquid heat exchanger;

A third liquid pump is arranged between the seventh valve and the third liquid/liquid heat exchanger.

Wherein, a ninth valve and a tenth valve are respectively arranged between the liquid inlet and the liquid outlet of the user-side device and the first liquid/liquid heat exchanger;

A third liquid pump is arranged between the tenth valve and the first liquid/liquid heat exchanger.

Wherein, the number of the solar heat collector is at least one.

A solar air source heat pump provided by the utility model adopts a plurality of air-cooled heat exchangers, utilizes the heat energy of the air absorbed by the air-cooled heat exchangers that do not need defrosting, and prepares hot water as frosted wind through the heat pump unit. The defrosting of the cold heat exchanger ensures the reliability of the defrosting of the air-cooled heat exchanger when there is no solar radiation or insufficient solar radiation, and ensures the reliability of the heat supply of the heat pump when the air-cooled heat exchanger is frosted. The effect of frost.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present disclosure. For those skilled in the art, other drawings can also be obtained according to these drawings on the premise of not paying creative efforts.

Fig. 1 is a schematic structural view of a solar air source composite heat pump provided by an embodiment of the present invention;

Fig. 2 is a structural schematic diagram of the solar heat pipe mode of the solar air source composite heat pump provided by an embodiment of the utility model;

Fig. 3 is a schematic structural diagram of the solar air source composite heat pump operating air source heat pump mode provided by an embodiment of the utility model;

Fig. 4 is a schematic structural diagram of the solar air source heat pump operating solar air source heat pump mode provided by an embodiment of the utility model;

Fig. 5 is a structural schematic diagram of defrosting under the solar heat pipe mode of the solar air source composite heat pump provided by an embodiment of the utility model;

Fig. 6 is a structural schematic diagram of defrosting in the air source heat pump mode of the solar air source composite heat pump provided by an embodiment of the utility model;

Fig. 7 is a structural schematic diagram of defrosting under the solar air source heat pump mode of the solar air source composite heat pump provided by an embodiment of the utility model;

Fig. 8 is a structural schematic diagram of a solar air source vapor compression heat pump provided by an embodiment of the utility model;

Fig. 9 is a schematic structural diagram of a solar air source vapor compression heat pump operating in a solar direct heating mode provided by an embodiment of the utility model;

Fig. 10 is a schematic structural diagram of the solar air source vapor compression heat pump operating air source heat pump mode provided by an embodiment of the utility model;

Fig. 11 is a structural schematic diagram of the solar air source heat pump running solar air source heat pump mode provided by an embodiment of the utility model;

Fig. 12 is a structural schematic diagram of the combination mode of the solar air source vapor compression heat pump running the air source heat pump and solar direct heating provided by an embodiment of the utility model;

Fig. 13 is a structural schematic diagram of the air-conditioning mode of the solar air source vapor compression heat pump provided by an embodiment of the present invention;

Fig. 14 is a schematic structural diagram of an air source heat pump operating air conditioning and solar direct heating combined mode provided by an embodiment of the utility model;

Fig. 15 is a structural schematic diagram of defrosting under the solar direct heating mode of the solar air source vapor compression heat pump provided by an embodiment of the present invention;

Fig. 16 is a structural schematic diagram of defrosting in the air source heat pump mode of the solar air source vapor compression heat pump provided by an embodiment of the utility model;

Fig. 17 is a structural schematic diagram of defrosting under the solar air source heat pump mode of the solar air source vapor compression heat pump provided by an embodiment of the utility model;

Fig. 18 is a structural schematic diagram of defrosting under the combination mode of the solar air source vapor compression heat pump running the air source heat pump and solar direct heating provided by an embodiment of the utility model.

Explanation of reference signs

In the figure, 11: solar heat collector 12: first valve 13: second valve 14: third valve 15: fourth valve 21: air-cooled heat exchanger 22: fifth valve 23: sixth valve 24: seventh Valve 25: Eighth valve 31: Compressor 32: First liquid/liquid heat exchanger 33: Throttle valve 34: Second liquid/liquid heat exchanger 35: Four-way valve 36: Three-way valve 37: Refrigerant valve 4: First liquid pump 5: User side device 5': Hot water user device 61: Ninth valve 62: Tenth valve 63: Second liquid pump 71: Third liquid/liquid heat exchanger 72: Third liquid pump 73: Eleventh valve 74: Twelfth valve 81: Fourth liquid/liquid heat exchanger 82: Fourth liquid pump 83: Thirteenth valve 84: Fourteenth valve 85: Fifteenth valve 86: Tenth Six valves 87: the fifth liquid pump.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present disclosure with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present disclosure.

It should be noted first that in the drawings in the embodiments of the present disclosure, the running devices and pipelines are represented by solid lines, and the closed devices and pipelines are represented by dotted lines.

An embodiment of the present disclosure provides a solar air source heat pump, including: a solar collector, an air source heat pump, a third liquid/liquid heat exchanger, and a user-side device;

The solar heat collector is connected to the air source heat pump and the user-side device; the air source heat pump includes: multiple air-cooled heat exchangers and heat pump units; multiple air-cooled heat exchangers are connected to the The heat pump unit is described, and the heat pump unit is connected to a user-side device; the user-side device is connected to a plurality of air-cooled heat exchangers through a third liquid/liquid heat exchanger.

Specifically, the multiple air-cooled heat exchangers in this embodiment are connected in parallel.

It should be noted that this embodiment does not limit the specific connection manner of the multiple air-cooled heat exchangers, and those skilled in the art may use different connection manners to connect the multiple air-cooled heat exchangers according to actual conditions.

Specifically, the number of multiple air-cooled heat exchangers in this embodiment is at least two, the heat energy of the air is absorbed through the air-cooled heat exchangers that do not need to be defrosted, and hot water is generated through the heat pump unit, and the heat energy of the air that needs to be defrosted is absorbed. Cold heat exchanger defrost.

Specifically, the number of solar heat collectors in this embodiment is at least one.

It should be noted that this embodiment does not limit the number and connection mode of the solar heat collectors, and those skilled in the art can set the number and connection mode of the solar heat collectors according to the actual situation.

The solar air source heat pump provided in this embodiment connects a plurality of air-cooled heat exchangers to the heat pump unit, utilizes the air-cooled heat exchanger that does not require defrosting to absorb air heat energy, and generates hot water through the heat pump unit. Defrost air-cooled heat exchanger defrost. When there is no solar radiation or insufficient solar radiation, the reliability of the defrosting of the air-cooled heat exchanger is guaranteed, and the effect of defrosting is improved. At the same time, the air-cooled heat exchanger does not affect the heating during defrosting, ensuring that the air Sustainability of source heat pump heating.

The heat pump unit in this embodiment can be a vapor compression heat pump unit or a composite heat pump unit.

As shown in Figure 1, an embodiment of the present disclosure discloses a solar air source composite heat pump. The heat pump unit is a composite heat pump unit, including: a compressor 31, a first liquid/liquid heat exchanger 32, a throttle valve 33, Two-liquid/liquid heat exchanger 34, three-way valve 36 and refrigerant valve 37;

One inlet of the three-way valve 36 is connected with the outlet of the compressor 31, and the other inlet of the three-way valve 36 is respectively connected with the inlet of the compressor 31 and the refrigerant outlet of the second liquid/liquid heat exchanger 34, and the three-way valve 36 The outlet of the first liquid/liquid heat exchanger 32 is connected to the refrigerant inlet; the refrigerant outlet of the first liquid/liquid heat exchanger 32 is respectively connected to the inlet of the throttle valve 33 and the inlet of the refrigerant valve 37; the second The refrigerant inlet of the liquid/liquid heat exchanger 34 is respectively connected with the outlet of the throttle valve 33 and the outlet of the refrigerant valve 37 .

The outlet of the solar collector 11 is connected with the inlet of the first valve 12 , and the inlet of the solar collector 11 is connected with the outlet of the second valve 13 .

The outlet of the air-cooled heat exchanger 21 is connected with the inlets of the fifth valve 22 and the seventh valve 24 respectively, and the inlet of the air-cooled heat exchanger 21 is connected with the outlets of the sixth valve 23 and the eighth valve 25 respectively; the first liquid pump The inlet of 4 is respectively connected with the outlet of the fifth valve 22 of each air-cooled heat exchanger and the outlet of the first valve 12 of each solar collector, and the outlet of the first liquid pump 4 exchanges heat with the second liquid/liquid The brine inlet of the device 34 is connected; the brine outlet of the second liquid/liquid heat exchanger 34 is respectively connected with the inlet of the sixth valve 23 of each air-cooled heat exchanger and the second valve of each solar collector 13 import connections.

The brine outlet and inlet of the first liquid/liquid heat exchanger 32 are respectively connected to the inlet of the ninth valve 61 and the outlet of the tenth valve 62, the inlet of the user-side device 5 is connected to the outlet of the ninth valve 61, and the second The outlet of the liquid pump 63 is connected to the inlet of the tenth valve 62 , and the inlet of the second liquid pump 63 is connected to the outlet of the user-side device 5 .

The first liquid outlet of the third liquid/liquid heat exchanger 71 is connected with the inlet of the eighth valve 25 of each air-cooled heat exchanger, and the second liquid inlet of the third liquid/liquid heat exchanger 71 is connected with the tenth valve. The outlet of a valve 73 is connected; the inlet of the third liquid pump 72 is connected with the outlet of the seventh valve 24, and the outlet of the third liquid pump 72 is connected with the first liquid inlet of the third liquid/liquid heat exchanger 71; the third The second liquid outlet of the liquid/liquid heat exchanger 71 is connected to the inlet of the twelfth valve 74 , and the outlet of the twelfth valve 74 is connected to the inlet of the user-side device 5 .

It should be noted that in this embodiment, the air-cooled heat exchanger is connected to the second liquid/liquid heat exchanger in the heat pump unit, that is, the heat pump evaporator, instead of using the air-cooled heat exchanger directly as the heat pump evaporator . With this connection mode, the hot water produced by the heat pump unit can be used to defrost the air-cooled heat exchanger.

In the solar air source heat pump provided in this embodiment, the heat pump unit adopts a composite heat pump unit. Compared with the existing solar air source heat pump, it saves the heat exchanger used for solar direct heating and the heat exchanger supporting the heat exchanger. Liquid pumps and associated piping reduce system complexity. At the same time, connect the air-cooled heat exchanger with the evaporator in the heat pump unit. At the same time, compared with the existing solar air source heat pump, it solves the problem of excessive pressure of the evaporator when the solar radiation is sufficient and the load of the solar heat collector is small.

The heating mode of a solar air source composite heat pump provided in this embodiment includes the following types:

(1) Solar heat pipe mode: This mode operates when the solar radiation is sufficient and hot water at the temperature required by the user can be produced, as shown in Figure 2: all air-cooled heat exchangers 21, the fifth valve 22, and the sixth valve are closed. Valve 23, the seventh valve 24, the eighth valve 25; the third liquid pump 72, the eleventh valve 73 and the twelfth valve 74; close the compressor 31 and the throttle valve 33 in the composite heat pump unit, and pass through the three-way valve The adjustment of 36 bypasses the compressor 31; turns on the first liquid pump 4 and the second liquid pump 63, and opens the first valve 12, the second valve 13, the ninth valve 61 and the tenth valve 62.

In this mode, the solar heat collector 11 absorbs solar radiation and heats the indoor working fluid, and the first liquid/liquid heat exchanger 32 in the composite heat pump unit produces hot water to provide heat for the user-side device 5 .

It should be noted that the outdoor working fluid heated by the solar collector is water or solution.

When the solar air source heat pump provided by this embodiment operates in the solar radiation heat pipe mode, the compressor 31 is not turned on, and there is no power consumption of the compressor, which reduces the power consumption of the solar air source heat pump.

(2) Air source heat pump mode: this mode operates without solar radiation, as shown in Figure 3: close the third liquid pump 72, close all the first valve 12 and the second valve 13 connected with the solar collector ;Close all the seventh valves 24 and 8th valves 25 connected to the air-cooled heat exchanger, close the eleventh valve 73 and the twelfth valve 74; the composite heat pump unit operates in heat pump mode: close the refrigerant valve 37, and enable the compressor 31 and the throttle valve 33, through the switching of the three-way valve 36, the compressor 31 is connected, the first liquid pump 4 and the second liquid pump 63 are turned on, the air-cooled heat exchanger 21 and the first liquid pump connected to the air-cooled heat exchanger 21 are turned on. The fifth valve 22 and the sixth valve 23 open the ninth valve 61 and the tenth valve 62 .

It should be noted that some or all of the air-cooled heat exchangers can be turned on here. This embodiment does not limit the number of turned-on air-cooled heat exchangers. Those skilled in the art can determine the number of air-cooled heat exchangers according to the actual situation. Turn on the quantity.

In this mode, the air-cooled heat exchanger absorbs the heat of the air and transfers the heat to the second liquid/liquid heat exchanger 34 through the outdoor working medium, and the heat is produced in the first liquid/liquid heat exchanger 32 through the heat pump cycle. The hot water supplies heat to the user-side device 5 .

(3) Solar air source heat pump mode: This mode operates when the solar radiation heat pipe mode is not enough to produce hot water required by users, as shown in Figure 4: close the seventh valve matched with each air-cooled heat exchanger 24 and the eighth valve 25; close the third liquid pump 72, close the eleventh valve 73 and the twelfth valve 74; the compound heat pump unit operates in heat pump mode: close the refrigerant valve 37, enable the compressor 31 and the throttle valve 33, Through the switching of the three-way valve 36, the compressor 31 is connected; all air-cooled heat exchangers 21, the fifth valve 22 and the sixth valve 23 are opened, the first liquid pump 4 and the second liquid pump 63 are opened, and the first valve 12, The second valve 13 , the ninth valve 61 and the tenth valve 62 .

In this mode, while the solar collector absorbs solar radiation, all the air-cooled heat exchangers absorb the heat energy of the air, and transfer the heat to the second liquid/liquid heat exchanger 34, and then circulate through the composite heat pump unit in the first Hot water is produced in the liquid/liquid heat exchanger 32 to provide heat for the user-side device 5 .

The defrosting mode of a solar air source composite heat pump provided in this embodiment includes the following types:

(1) Defrost mode in solar heat pipe mode: run under the condition that some air-cooled heat exchangers are frosted and the solar radiation is sufficient, as shown in Figure 5: open all air-cooled heat exchangers 21 to be defrosted And close and the fan corresponding thereto, open all the seventh valves 24 and eighth valves 25 connected with the air-cooled heat exchanger 21 to be defrosted, and close all the seventh valves 24 and the eighth valve 25 connected with the air-cooled heat exchanger 21 to be defrosted. Five valves 22, the sixth valve 23; close all the air-cooled heat exchangers 21 that do not need to be defrosted and the corresponding fans, and close all the fifth valves 22, 21 that are connected to the air-cooled heat exchangers 21 that do not need to be defrosted. The sixth valve 23, the seventh valve 24 and the eighth valve 25; open the third liquid/liquid heat exchanger 71, the third liquid pump 72, the eleventh valve 73 and the twelfth valve 74, close the Compressor 31, throttle valve 33, bypass compressor 31 through the regulation of three-way valve 36; open first liquid pump 4 and second liquid pump 63, open first valve 12, second valve 13, ninth valve 61 and a tenth valve 62 .

In this mode, the solar collector absorbs solar radiation and heats the outdoor working medium, and the hot water is produced through the composite heat pump unit, and part of the produced hot water is given to the user-side device 5, and the other part is passed through the third liquid/liquid The heat exchanger 71 transfers heat to the air-cooled heat exchanger to be defrosted for defrosting.

(2) Defrost mode under the air source heat pump mode: run under the situation that part of the air-cooled heat exchanger is frosted and there is no solar radiation, as shown in Figure 6: close all the first connected to the solar collector 11 Valve 12 and second valve 13; close all fans corresponding to the air-cooled heat exchanger to be defrosted, close all fifth valves 22 and sixth valves 23 connected to the air-cooled heat exchanger to be defrosted, open all The seventh valve 24 and the eighth valve 25 connected to the air-cooled heat exchanger to be defrosted; open all the fans corresponding to the air-cooled heat exchanger 21 that do not need to be defrosted, and close all the fans that are connected to the air-cooled heat exchanger that does not need to be defrosted The seventh valve 24 and the eighth valve 25 connected, open all the fifth valve 22 and the sixth valve 23 connected with the air-cooled heat exchanger that does not need to be defrosted; the composite heat pump unit operates in heat pump mode: close the refrigerant valve 37, enable The compressor 31 and the throttle valve 33 are connected to the compressor 31 through the switching of the three-way valve 36; the first liquid pump 4, the second liquid pump 63 and the third liquid pump 72 are turned on; the ninth valve 61 and the tenth valve 62 are opened , the eleventh valve 73 and the twelfth valve 74.

In this mode, the air-cooled heat exchanger that does not need defrosting absorbs the heat energy of the air and transfers it to the second liquid/liquid heat exchanger 34, and obtains hot water in the first liquid/liquid heat exchanger 32 through the heat pump cycle, and part of the heat is The water supplies heat to the user-side device 5 , and the other part transfers heat to the air-cooled heat exchanger to be defrosted through the third liquid/liquid heat exchanger 71 for defrosting.

(3) The defrosting mode under the solar air source heat pump mode: it operates when part of the air-cooled heat exchanger is frosted and the solar radiation is insufficient, as shown in Figure 7: open the first valve 12 and the second valve 13; Close all fans corresponding to the air-cooled heat exchanger to be defrosted, close all fifth valves 22 and sixth valves 23 connected to the air-cooled heat exchanger to be defrosted, and open all air-cooled heat exchangers to be defrosted The seventh valve 24 and the eighth valve 25 connected; open all fans corresponding to the air-cooled heat exchanger 21 that do not need to be defrosted, and close all the seventh valves 24 and the eighth valve that are connected to the air-cooled heat exchanger that do not need to be defrosted. Eight valves 25, open all fifth valves 22 and sixth valves 23 connected to air-cooled heat exchangers that do not require defrosting; the compound heat pump unit operates in heat pump mode: close refrigerant valve 37, enable compressor 31 and throttle valve 33 , communicate with the compressor 31 through switching of the three-way valve 36; open the first liquid pump 4, the second liquid pump 63, the third liquid pump 72 and the third liquid/liquid heat exchanger 71; open the ninth valve 61, the tenth valve 62 , eleventh valve 73 and twelfth valve 74 .

In this mode, while the solar collector 11 absorbs solar radiation, all the air-cooled heat exchangers that do not need to defrost absorb the heat energy of the air, and transfer the heat to the second liquid/liquid heat exchanger 34 at the same time, and then through the compound The heat pump unit circulates in the first liquid/liquid heat exchanger 32 to produce hot water, a part of the hot water supplies heat to the user-side device 5, and the other part transfers heat to the air to be defrosted through the third liquid/liquid heat exchanger 71. A cold heat exchanger is used for defrosting.

As shown in Figure 8, another embodiment of the utility model discloses a solar air source vapor compression heat pump, the heat pump unit adopts a vapor compression heat pump unit, including: a compressor 31, a first liquid/liquid heat exchanger 32 , throttle valve 33, second liquid/liquid heat exchanger 34 and four-way valve 35;

The first liquid/liquid heat exchanger 32 and the second liquid/liquid heat exchanger 34 are connected to the compressor 31 through a four-way valve 35;

The first liquid/liquid heat exchanger 32 is connected to the second liquid/liquid heat exchanger 34 through a throttle valve 33 .

It should be noted that the working medium in the heat pump unit is refrigerant, and the flow direction of the refrigerant in the heat pump unit is changed by switching the four-way valve.

Specifically, by switching the four-way valve 35, the refrigerant outlet of the compressor is connected to the refrigerant inlet of the first liquid/liquid heat exchanger 32, and the refrigerant inlet of the compressor is connected to the second liquid/liquid heat exchanger. 34 is connected to the refrigerant outlet; the refrigerant outlet of the first liquid/liquid heat exchanger 32 is connected to the refrigerant inlet of the second liquid/liquid heat exchanger 34 through the throttle valve 33 . At this time, the vapor compression heat pump unit operates in the air source heat pump mode for heating.

Specifically, by switching the four-way valve 35, the refrigerant outlet of the compressor is connected to the refrigerant inlet of the second liquid/liquid heat exchanger 34, and the refrigerant inlet of the compressor is connected to the first liquid/liquid heat exchanger. 32 is connected to the refrigerant outlet; the refrigerant inlet of the first liquid/liquid heat exchanger 32 is connected to the refrigerant outlet of the second liquid/liquid heat exchanger 34 through a throttle valve 33 . At this time, the vapor compression heat pump operates in the air source air conditioning mode for cooling.

Specifically, as shown in Figure 8, the outlet of the solar collector 11 is connected with the inlet of the first valve 12 and the third valve 14 respectively, and the inlet of the solar collector 11 is connected with the inlet of the second valve 13 and the fourth valve 15 respectively. Export connections.

All the outlets of the third valves 14 connected to the solar collectors are connected with the inlet of the fourth liquid pump 82, and the outlets of the fourth liquid pump 82 are connected with the first liquid inlet of the fourth liquid/liquid heat exchanger 81, all The inlet of the fourth valve 15 connected to the solar heat collector is connected with the first liquid outlet of the fourth liquid/liquid heat exchanger 81, the inlet of the thirteenth valve 83 is connected with the outlet of the second liquid pump 63, and the tenth valve 83 is connected with the outlet of the second liquid pump 63. The outlet of the three valves 83 is connected with the second liquid inlet of the fourth liquid/liquid heat exchanger 81, the inlet of the fourteenth valve 84 is connected with the second liquid outlet of the fourth liquid/liquid heat exchanger 81, and the tenth valve 84 is connected with the second liquid outlet of the fourth liquid/liquid heat exchanger 81. The outlets of the four valves 84 are connected to the inlets of the user-side device 5 .

The outlet of the air-cooled heat exchanger 21 is connected with the inlets of the fifth valve 22 and the seventh valve 24 respectively, and the inlet of the air-cooled heat exchanger 21 is connected with the outlets of the sixth valve 23 and the eighth valve 25 respectively; the first liquid pump The inlet of 4 is respectively connected with the outlet of the fifth valve 22 and the outlet of the first valve 12 of each solar collector, and the outlet of the first liquid pump 4 is connected with the brine inlet of the second liquid/liquid heat exchanger 34 ; The brine outlet of the second liquid/liquid heat exchanger 34 is respectively connected with the inlet of the sixth valve 23 of the air-cooled heat exchanger 21 and the inlet of the second valve 13 of each solar radiation collector.

The brine outlet and inlet of the first liquid/liquid heat exchanger 32 are respectively connected to the inlet of the ninth valve 61 and the outlet of the tenth valve 62, the inlet of the user-side device 5 is connected to the outlet of the ninth valve 61, and the second The outlet of the liquid pump 63 is connected to the inlet of the tenth valve 62 , and the inlet of the second liquid pump 63 is connected to the outlet of the user-side device 5 .

The first liquid outlet of the third liquid/liquid heat exchanger 71 is connected with the inlet of the eighth valve 25 of each air-cooled heat exchanger, and the second liquid inlet of the third liquid/liquid heat exchanger 71 is connected with the tenth valve. The outlet of a valve 73 is connected; the inlet of the third liquid pump 72 is connected with the outlet of the seventh valve 24, and the outlet of the third liquid pump 72 is connected with the first liquid inlet of the third liquid/liquid heat exchanger 71; the third The second liquid outlet of the liquid/liquid heat exchanger 71 is connected to the inlet of the twelfth valve 74 , and the outlet of the twelfth valve 74 is connected to the inlet of the user-side device 5 . The inlet and outlet of the compressor 31 are respectively connected to the ports d and b of the four-way valve 35, and the two ends of the first liquid/liquid heat exchanger 32 are respectively connected to one end of the throttle valve 33 and the port c of the four-way valve 35, and the second Both ends of the two-liquid/liquid heat exchanger 34 are respectively connected to the other end of the throttle valve 33 and port a of the four-way valve 35 .

The heating mode and cooling mode of a solar radiation air source vapor compression heat pump provided in this embodiment include the following types:

It should be noted that, in the heating mode, the internal connection mode of the four-way valve 35 is that port a is connected with port d, and port b is connected with port c; at this time, the second liquid/liquid heat exchanger 34 and the four-way valve The port connected to port a of 35 is the refrigerant outlet, the port connected to the second liquid/liquid heat exchanger 34 and the throttle valve 33 is the refrigerant inlet; the port of the first liquid/liquid heat exchanger 32 and the four-way valve 35 The port connected to c is the refrigeration inlet, and the port connected to one end of the first liquid/liquid heat exchanger 32 and the throttle valve 33 is the refrigerant outlet.

It should be noted that, in the refrigeration mode, the internal connection mode of the four-way valve 35 is that port a is connected with port b, and port d is connected with port c; at this time, the second liquid/liquid heat exchanger 34 and the four-way valve 35 The port connected to the port a of the first liquid/liquid heat exchanger 34 is the refrigerant inlet, and the port connected to the throttle valve 33 of the second liquid/liquid heat exchanger 34 is the refrigerant outlet; the port c of the first liquid/liquid heat exchanger 32 and the four-way valve 35 The port connected is the refrigeration outlet, and the port connected to one end of the first liquid/liquid heat exchanger 32 and the throttle valve 33 is the refrigerant inlet.

(1) Solar direct heating mode: This mode operates when the solar radiation is sufficient, hot water at the temperature required by the user can be directly produced, and the heating capacity is greater than or equal to the required heating capacity, as shown in Figure 9: all fans are turned off. Cold heat exchanger 21, the fifth valve 22, the sixth valve 23, the seventh valve 24 and the eighth valve 25; close the ninth valve 61, the tenth valve 62, the eleventh valve 73 and the twelfth valve 74; close Vapor compression heat pump unit; close the first liquid pump 4 and the third liquid pump 72; run the solar collector 11, the fourth liquid pump 82 and the second liquid pump 63, open the third valve 14, the fourth valve 15, the tenth valve Three valves 83 and fourteenth valves 84 .

In this mode, the solar heat collector 11 absorbs solar radiation and heats the outdoor working medium, and transfers the heat to the indoor working medium through the fourth liquid/liquid heat exchanger 81 to produce hot water for the user-side device 5. hot.

(2) Air source heat pump mode: this mode operates without solar radiation, as shown in Figure 10: close the third liquid pump 72 and the fourth liquid pump 82, and close all the first valves connected to the solar collector 12. The second valve 13, the third valve 14 and the fourth valve 15, close all the seventh valves 24 and eighth valves 25 connected to the air-cooled heat exchanger, close the eleventh valve 73, the twelfth valve 74, The thirteenth valve 83 and the fourteenth valve 84; operating the vapor compression heat pump unit: the outlet of the compressor 31 is connected to the refrigerant inlet of the first liquid/liquid heat exchanger 32 by switching the four-way valve 35, and the compressor 31 The inlet of the second liquid/liquid heat exchanger 34 is connected to the refrigerant outlet of the second liquid/liquid heat exchanger 34, and the vapor compression heat pump unit operates in heating mode; the first liquid pump 4 and the second liquid pump 63 are operated, and the air-cooled heat exchanger 21 and the The fifth valve 22 and the sixth valve 23 connected to the air-cooled heat exchanger 21 open the ninth valve 61 and the tenth valve 62 .

It should be noted that some or all of the air-cooled heat exchangers can be turned on here. This embodiment does not limit the number of turned-on air-cooled heat exchangers. Those skilled in the art can determine the number of air-cooled heat exchangers according to the actual situation. Turn on the quantity.

In this mode, the air-cooled heat exchanger 21 absorbs the heat of the ambient air and heats the working fluid outside the room, and transfers the heat to the second liquid/liquid heat exchanger 34, which circulates in the first liquid/liquid heat exchanger 32 through the heat pump. Hot water is produced to provide heat for the user-side device 5 .

(3) Solar air source heat pump mode: this mode operates when the solar direct heating mode is not enough to produce the hot water required by the user, as shown in Figure 11: close all the third valves 14 connected to the solar collector and the fourth valve 15; close all the seventh valves 24 and eighth valves 25 connected to the air-cooled heat exchanger; close the third liquid pump 72 and the fourth liquid pump 82, and close the eleventh valve 73 and the twelfth valve 74. The thirteenth valve 83 and the fourteenth valve 84; run the vapor compression heat pump unit: through the switching of the four-way valve 35, the outlet of the compressor 31 is connected to the refrigerant inlet of the first liquid/liquid heat exchanger 32, and the compression The inlet of the machine 31 is connected to the refrigerant outlet of the second liquid/liquid heat exchanger 34, and the unit operates in the heating mode; the first liquid pump 4 and the second liquid pump 63 are operated, and all the first liquid pumps connected to the solar collector are turned on. A valve 12 and a second valve 13 are used to open all air-cooled heat exchangers 21 , the fifth valve 22 and the sixth valve 23 connected to all air-cooled heat exchangers 21 ; open the ninth valve 61 and the tenth valve 62 .

In this mode, while the solar collector 11 absorbs solar radiation, all the air-cooled heat exchangers absorb the heat energy of the air, and jointly transfer the heat to the second liquid/liquid heat exchanger 34, and then circulate through the vapor compression heat pump unit. Hot water is produced in the first liquid/liquid heat exchanger 32 to provide heat for the user-side device 5 .

(4) Combined mode of air source heat pump and direct solar heating: This mode operates when the solar radiation is weak and the solar collector can produce hot water at the temperature required by the user, but the heating capacity is less than the required heating capacity. As shown in Figure 12: close all first valves 12 and second valves 13 connected with solar collectors; close all seventh valves 24 and eighth valves 25 connected with air-cooled heat exchangers; close the third liquid pump 72, close the eleventh valve 73 and the twelfth valve 74; run the heat pump unit: through the switching of the four-way valve 35, the outlet of the compressor 31 is connected to the refrigerant inlet of the first liquid/liquid heat exchanger 32, and the compressor The inlet of 31 is connected with the refrigerant outlet of the second liquid/liquid heat exchanger 34, and the unit operates in the heating mode; the first liquid pump 4, the fourth liquid pump 82 and the second liquid pump 63 are operated; The first valve 12 and the second valve 13 connected to the heat exchanger; open all air-cooled heat exchangers 21, all fifth valves 22 and sixth valves 23 connected with the air-cooled heat exchanger 21; open the ninth valve 61, the The tenth valve 62 , the thirteenth valve 83 and the fourteenth valve 84 .

In this mode, the solar heat collector 11 absorbs solar energy and directly produces hot water through the fourth liquid/liquid heat exchanger 81 to provide heat for the user-side device 5, while the air-cooled heat exchanger 21 absorbs air heat and transfers it to The second liquid/liquid heat exchanger 34 produces hot water in the first liquid/liquid heat exchanger 32 through a heat pump cycle to provide heat for the user-side device 5 .

(5) Air-source air-conditioning mode: this mode operates when cooling is required, as shown in Figure 13: close all the first valve 12, the second valve 13, the third valve 14 and the fourth valve connected to the solar collector Valve 15; close all seventh valves 24 and eighth valves 25 connected to the air-cooled heat exchanger; close the third liquid pump 72 and the fourth liquid pump 82, close the eleventh valve 73, the twelfth valve 74, the The thirteenth valve 83 and the fourteenth valve 84; the first liquid pump 4 and the second liquid pump 63 are operated; the outlet of the compressor 31 is connected to the refrigerant inlet of the second liquid/liquid heat exchanger 34 by switching the four-way valve 35 connection, the inlet of the compressor 31 is connected to the refrigerant outlet of the first liquid/liquid heat exchanger 32, and the vapor compression heat pump unit operates in refrigeration mode; open the air-cooled heat exchanger 21 and the fifth The valve 22 and the sixth valve 23; the ninth valve 61 and the tenth valve 62 are opened.

It should be noted that some or all of the air-cooled heat exchangers can be turned on here. This embodiment does not limit the number of turned-on air-cooled heat exchangers. Those skilled in the art can determine the number of air-cooled heat exchangers according to the actual situation. Turn on the quantity.

In this mode, the first liquid/liquid heat exchanger 32 absorbs the user’s heat, and transfers the heat to the second liquid/liquid heat exchanger 34 through the heat pump cycle, and then dissipates the heat to the outside through the air-cooled heat exchanger 21 The environment provides cooling for the user-side device 5 .

(6) Combined mode of air-conditioning and direct solar heating with air source heat pump: This mode operates under the condition that there is both cooling and heating demand, sufficient solar energy, and the solar collector can produce hot water at the required temperature, as shown in Figure 14 Show: close all first valves 12 and second valves 13 connected to solar collectors, open all third valves 14 and fourth valves 15 connected to solar collectors; close all valves connected to air-cooled heat exchangers The seventh valve 24 and the eighth valve 25; close the third liquid pump 72, close the eleventh valve 73, the twelfth valve 74, the thirteenth valve 83 and the fourteenth valve 84; run the first liquid pump 4 and the The second liquid pump 63, the fourth liquid pump 82 and the fifth liquid pump 87; the outlet of the compressor 31 is connected to the refrigerant inlet of the second liquid/liquid heat exchanger 34 by switching the four-way valve 35, and the inlet of the compressor 31 Connect to the refrigerant outlet of the first liquid/liquid heat exchanger 32, and the vapor compression heat pump unit operates in refrigeration mode; open the air-cooled heat exchanger 21, the fifth valve 22 and the sixth valve 23 connected to the air-cooled heat exchanger 21 ; Open the ninth valve 61 and the tenth valve 62 ; Open the fifteenth valve 85 and the sixteenth valve 86 .

It should be noted that some or all of the air-cooled heat exchangers can be turned on here. This embodiment does not limit the number of turned-on air-cooled heat exchangers. Those skilled in the art can determine the number of air-cooled heat exchangers according to the actual situation. Turn on the quantity.

In this mode, on the one hand, the first liquid/liquid heat exchanger 32 absorbs the user’s heat, and transfers the heat to the second liquid/liquid heat exchanger 34 through the heat pump cycle, and then transfers the heat through the air-cooled heat exchanger 21 Distributed to the outdoor environment to provide cooling for the user-side device 5; The heat collector directly heats the hot water user device 5'.

It should be noted that in this mode, the user-side device 5 is an air-conditioning user who needs to use cold water, and the temperature of the cold water is generally about 7° C., and the hot user device 5' is a user who needs to use hot water. This mode can meet the user's demand for heating and cooling at the same time.

The defrosting mode of a solar air source evaporative compression heat pump provided in this embodiment includes the following types:

(1) The defrosting mode carried out under the mode of solar direct heating: run under the condition that part of the air-cooled heat exchanger is frosted and the solar radiation is sufficient, as shown in Figure 15: open all connections with the solar collector 11 The third valve 14 and the fourth valve 15 close all the first valves 12 and the second valves 13 connected to the solar collector 11; open all the air-cooled heat exchangers 21 to be defrosted and close the corresponding fans , open all the seventh valves 24 and eighth valves 25 connected to the air-cooled heat exchanger 21 to be defrosted, and close all the fifth valves 22 and sixth valves 23 connected to the air-cooled heat exchanger 21 to be defrosted ; Close all the fifth valve 22, the sixth valve 23, the seventh valve 24 and the eighth valve 25 connected to the air-cooled heat exchanger 21 that do not need defrosting; close the vapor compression heat pump unit; close the first liquid pump 4; Run the solar heat collector 11, the second liquid pump 63, the third liquid pump 72, and the fourth liquid pump 82, open the ninth valve 61, the tenth valve 62, the eleventh valve 73, the twelfth valve 74, the Thirteenth valve 83 and fourteenth valve 84 .

In this mode, the solar collector 11 absorbs solar radiation and heats the outdoor working medium, and transfers the heat to the indoor working medium through the fourth liquid/liquid heat exchanger 81 to produce hot water, part of which is the user-side device 5 The other part passes the heat to the air-cooled heat exchanger to be defrosted through the third liquid/liquid heat exchanger 71 for defrosting.

(2) Defrost mode in the air source heat pump mode: run under the condition that part of the air-cooled heat exchanger is frosted and there is no solar radiation, as shown in Figure 16: turn off all the first connected to the solar collector 11 Valve 12, second valve 13, third valve 14 and fourth valve 15; close all fans corresponding to the air-cooled heat exchanger to be defrosted, and close all fifth valves connected to the air-cooled heat exchanger to be defrosted 22 and the sixth valve 23, open all the seventh valves 24 and eighth valves 25 connected to the air-cooled heat exchangers to be defrosted; open all the fans corresponding to the air-cooled heat exchangers 21 that do not need to be defrosted, and close All seventh valves 24 and eighth valves 25 connected to air-cooled heat exchangers that do not require defrosting are opened, and all fifth valves 22 and sixth valves 23 connected to air-cooled heat exchangers that are not required to be defrosted are opened; the fourth valve is closed. Liquid pump 82; running heat pump unit: the outlet of the compressor 31 is connected to the refrigerant inlet of the first liquid/liquid heat exchanger 32 through switching of the four-way valve 35, and the inlet of the compressor 31 exchanges heat with the second liquid/liquid The refrigerant outlet of the device 34 is connected, and the unit operates in heating mode; the first liquid pump 4, the second liquid pump 63 and the third liquid pump 72 are operated; the ninth valve 61, the tenth valve 62, and the eleventh valve 73 are opened and a twelfth valve 74 .

In this mode, the air-cooled heat exchanger 21 that does not need defrosting absorbs the heat energy of the air and transfers it to the second liquid/liquid heat exchanger 34, and obtains hot water in the first liquid/liquid heat exchanger 32 through the heat pump cycle, and heat Part of the water supplies heat to the user-side device 5 , and the other part passes heat through the third liquid/liquid heat exchanger 71 to the air-cooled heat exchanger to be defrosted for defrosting.

(3) The defrosting mode under the solar air source heat pump mode: run under the condition that part of the air-cooled heat exchanger is frosted and the solar radiation is insufficient, as shown in Figure 17: open all the first connected to the solar collector 11 One valve 12, the second valve 13, close all the third valve 14 and the fourth valve 15 that are connected with the solar heat collector; Close all fans corresponding to the air-cooled heat exchanger to be defrosted, and close all The fifth valve 22 and the sixth valve 23 connected to the air-cooled heat exchanger, open all the seventh valves 24 and eighth valves 25 connected to the air-cooled heat exchanger to be defrosted; For the fan corresponding to the heat exchanger 21, close all the seventh valves 24 and eighth valves 25 connected to the air-cooled heat exchanger that do not require defrosting, and open all the fifth valves 22 that are connected to the air-cooled heat exchanger that does not require defrosting and the sixth valve 23; run the vapor compression heat pump unit: the outlet of the compressor 31 is connected to the refrigerant inlet of the first liquid/liquid heat exchanger 32 by switching the four-way valve 35, and the inlet of the compressor 31 is connected to the second liquid The refrigerant outlet of the /liquid heat exchanger 34 is connected, and the unit is running in heating mode; close the fourth liquid pump 82, the thirteenth valve 83 and the fourteenth valve 84; open the third liquid/liquid heat exchanger 71, the Three liquid pumps 72 , eleventh valves 73 , and twelfth valves 74 ; the first liquid pump 4 and the second liquid pump 63 are operated, and the ninth valve 61 and the tenth valve 62 are opened.

In this mode, while the solar collector 11 absorbs solar radiation, all the air-cooled heat exchangers that do not need to defrost absorb the heat energy of the air, and at the same time transfer the heat to the second liquid/liquid heat exchanger 34, and then through the steam The compression heat pump unit produces hot water in the first liquid/liquid heat exchanger 32, a part of the hot water supplies heat to the user-side device 5, and the other part transfers heat to the air to be defrosted through the third liquid/liquid heat exchanger 71. A cold heat exchanger is used for defrosting.

(4) Defrost mode under the combined mode of air source heat pump and direct solar heating: In this mode, when the solar radiation is insufficient, the solar collector can produce hot water at the temperature required by the user, but the heating capacity is less than the required heating capacity. In case of operation, as shown in Figure 18: close all first valves 12 and second valves 13 connected with solar collectors, open all third valves 14 and fourth valves 15 connected with solar collectors; close all For the fan corresponding to the air-cooled heat exchanger to be defrosted, close all fifth valves 22 and sixth valves 23 connected to the air-cooled heat exchanger to be defrosted, and open all valves connected to the air-cooled heat exchanger to be defrosted The seventh valve 24 and the eighth valve 25; open all fans corresponding to the air-cooled heat exchangers 21 that do not need to be defrosted, and close all the seventh valves 24 and eighth valves that are connected to the air-cooled heat exchangers that do not need to be defrosted 25. Open all fifth valves 22 and sixth valves 23 connected to air-cooled heat exchangers that do not require defrosting; run the heat pump unit: switch the outlet of the compressor 31 with the first liquid/liquid exchange through the switching of the four-way valve 35 The refrigerant inlet of the heater 32 is connected, the inlet of the compressor 31 is connected with the refrigerant outlet of the second liquid/liquid heat exchanger 34, and the unit operates in heating mode; the first liquid pump 4, the second liquid pump 63, The third liquid pump 72, the fourth liquid pump 82 and the third liquid/liquid heat exchanger 71; open the ninth valve 61, the tenth valve 62, the eleventh valve 73, the twelfth valve 74, and the thirteenth valve 83 and the fourteenth valve 84 .

In this mode, the solar heat collector 11 absorbs solar energy and produces hot water through the fourth liquid/liquid heat exchanger 81, and at the same time, all air-cooled heat exchangers 21 that do not need defrosting absorb air heat and transfer it to the second liquid /liquid heat exchanger 34, hot water is produced in the first liquid/liquid heat exchanger 32 through heat pump circulation, and part of the hot water produced by the fourth liquid/liquid heat exchanger 81 and the first liquid/liquid heat exchanger 32 is The user-side device 5 supplies heat, and the other part transfers the heat to the air-cooled heat exchanger to be defrosted through the third liquid/liquid heat exchanger 71 for defrosting.

The solar air source heat pump provided by this embodiment uses solar energy to defrost the frosted air-cooled heat exchanger when the solar radiation is sufficient; The heat is used to defrost the frosted air-cooled heat exchanger; in the absence of solar radiation, the air-cooled heat exchanger that does not need to be defrosted can be used to absorb the heat energy of the air, and the heat pump unit can be used to prepare hot water for the frosted wind. The defrosting of the cold heat exchanger ensures the reliability of defrosting and improves the effect of defrosting. At the same time, the heating is not affected during defrosting, which ensures the continuity of heating.

Those of ordinary skill in the art can understand that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art It should be understood that it is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the rights of the utility model. The scope limited by the requirements.

Claims (10)

1. A solar air source heat pump, characterized in that, comprising: a solar heat collector, an air source heat pump, a third liquid/liquid heat exchanger and a user-side device; The solar heat collector is connected to the air source heat pump and the user-side device; The air source heat pump includes: multiple air-cooled heat exchangers and heat pump units; The plurality of air-cooled heat exchangers are connected to the heat pump unit, and the heat pump unit is connected to the user-side device; The user-side device is connected to the plurality of air-cooled heat exchangers through the third liquid/liquid heat exchanger. 2. The solar air source heat pump according to claim 1, wherein the heat pump unit is a compound heat pump unit, comprising: a compressor, a three-way valve, a first liquid/liquid heat exchanger, a second liquid/liquid Heat exchangers, throttle valves and refrigerant valves; The refrigerant outlet of the second liquid/liquid heat exchanger, the refrigerant inlet and refrigerant outlet of the compressor, the first port and the second port of the three-way valve, the first liquid/liquid heat exchanger The refrigerant inlet and refrigerant outlet of the heater, the refrigerant inlet and refrigerant outlet of the throttling valve, and the refrigerant inlet of the second liquid/liquid heat exchanger are connected in sequence; The refrigerant outlet of the second liquid/liquid heat exchanger is connected to the third port of the three-way valve; The refrigerant valve is connected in parallel with the throttle valve. 3. The solar air source heat pump according to claim 1, wherein the heat pump unit is a vapor compression heat pump unit, comprising: a compressor, a four-way valve, a first liquid/liquid heat exchanger, a second liquid/liquid Liquid heat exchanger and throttle valve; The first liquid/liquid heat exchanger and the second liquid/liquid heat exchanger are connected to the compressor through the four-way valve; The first liquid/liquid heat exchanger is connected to the second liquid/liquid heat exchanger through the throttle valve. 4. The solar air source heat pump according to claim 2 or 3, characterized in that, The liquid outlet of the solar heat collector is connected to the brine inlet of the second liquid/liquid heat exchanger through the first liquid pump; the liquid outlet of the solar heat collector is connected to the first liquid pump A first valve is arranged between; The liquid inlet of the solar heat collector is connected to the brine outlet of the second liquid/liquid heat exchanger through a second valve. 5. The solar air source heat pump according to claim 2 or 3, characterized in that, The liquid outlets of the plurality of air-cooled heat exchangers are connected to the brine inlet of the second liquid/liquid heat exchanger through the first liquid pump; the liquid outlets of each air-cooled heat exchanger are connected to the second liquid/liquid heat exchanger A fifth valve is arranged between the first liquid pump; The liquid inlet of each air-cooled heat exchanger is connected to the brine outlet of the second liquid/liquid heat exchanger through a sixth valve. 6. The solar air source heat pump according to claim 3, characterized in that, the solar air source heat pump further comprises: a fourth liquid/liquid heat exchanger; The solar heat collector is connected to the user-side device through the fourth liquid/liquid heat exchanger. 7. The solar air source heat pump according to claim 6, wherein the solar heat collector is connected to the user-side device through the fourth liquid/liquid heat exchanger, comprising: A third valve and a fourth valve are respectively arranged between the liquid outlet and the liquid inlet of the solar heat collector and the fourth liquid/liquid heat exchanger; A fourth liquid pump is arranged between the third valve and the fourth liquid/liquid heat exchanger; A thirteenth valve and a fourteenth valve are respectively arranged between the liquid outlet and the liquid inlet of the user-side device and the fourth liquid/liquid heat exchanger; The liquid outlet of the user-side device is connected to the thirteenth valve through the second liquid pump. 8. The solar air source heat pump according to claim 1, wherein the user-side device is connected to the plurality of air-cooled heat exchangers through the third liquid/liquid heat exchanger, comprising: An eleventh valve and a twelfth valve are respectively arranged between the liquid outlet and the liquid inlet of the user-side device and the third liquid/liquid heat exchanger; The liquid outlet of the user-side device is connected to the eleventh valve through the second liquid pump; A seventh valve and an eighth valve are respectively arranged between the liquid outlet and the liquid inlet of each air-cooled heat exchanger and the third liquid/liquid heat exchanger; A third liquid pump is arranged between the seventh valve and the third liquid/liquid heat exchanger. 9. The solar air source heat pump according to claim 2 or 3, characterized in that a ninth heat pump is respectively arranged between the liquid inlet and the liquid outlet of the user-side device and the first liquid/liquid heat exchanger. valve and tenth valve; A third liquid pump is arranged between the tenth valve and the first liquid/liquid heat exchanger. 10. The solar air source heat pump according to claim 1, characterized in that the number of said solar collectors is at least one.