An enthalpy-increasing type cold and hot full energy efficiency recovery heat pump

Abstract

The present invention relates to the field of heat pump technology, and in particular to an enthalpy-increasing type cold and hot full energy-efficiency recovery heat pump. It includes a compressor, an outdoor heat exchanger, a heat recovery heat exchanger, an economizer, a first expansion valve, and a second expansion valve; the outdoor heat exchanger is arranged outdoors and is connected to the exhaust port of the compressor; the heat recovery heat exchanger is connected to the exhaust port of the compressor; the economizer is connected to the heat recovery heat exchanger or the outdoor heat exchanger; the first expansion valve and the second expansion valve are respectively connected to the main circuit of the economizer; the second expansion valve is reversely connected to the auxiliary circuit of the economizer, and the auxiliary circuit of the economizer is connected to the air supply port of the compressor to supply air to the compressor and increase enthalpy. The cold and hot full energy-efficiency recovery heat pump of the present invention can meet the cooling demand of the refrigeration equipment and the heating demand of the heat-using equipment without being affected by the season. At the same time, by means of air supply and enthalpy increase, it can effectively improve the cooling and heating full energy efficiency of the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of heat pumps, in particular to an enthalpy-increasing type cold and hot full-energy-efficiency recovery heat pump. Background Art

[0002] In recent years, some air source heat pumps have appeared on the market. They mainly use finned radiators from the outdoors to make the refrigerant exchange heat with the outdoor air to evaporate and be sucked into the compressor through a four-way reversing valve. After compression, the high-temperature and high-pressure gaseous refrigerant passes through the four-way reversing valve and enters the indoor water source heat recovery heat exchanger (i.e., refrigerant heat exchanger). The refrigerant gas releases heat in the water source heat recovery heat exchanger and condenses into high-pressure liquid refrigerant. The liquid refrigerant is depressurized and throttled by the throttling mechanism of the indoor unit, enters the indoor refrigeration equipment to evaporate and absorb heat, and becomes a gaseous refrigerant that is sucked away by the compressor.

[0003] However, existing air source heat pumps usually have the following defects: 1. They are greatly affected by the seasons. In winter, the equipment cannot recover cold air. In an environment below minus 10 degrees, the equipment energy efficiency ratio is low. When the outdoor ambient temperature is lower, the compressor does not return enough air, the equipment is paralyzed and cannot operate; 2. After the temperature at the heat recovery end reaches above 50 degrees, the refrigerant gas cannot be completely condensed into liquid in the water source heat recovery heat exchanger, resulting in poor refrigeration capacity of the equipment, high operating pressure of the equipment, and easy failure; 3. The degree of automation is low. During the operation of the system, the cold and hot recovery ends often cannot reach a balance, so special personnel are required to operate; 4. It cannot be miniaturized. The current products on the market have many installation accessories, high requirements for heat exchangers, large size, unreasonable design, and generally large size; 5. The scope of use is small. The cold recovery end can only produce chilled water at about 7 degrees for air conditioning, and cannot produce lower temperatures for freezing seafood, meat and other products.

[0004] Therefore, it is necessary to propose improvement plans for existing air source heat pumps to maximize the performance of air source heat pumps and meet actual needs in practical applications. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide an enthalpy-added cold and hot full-energy-efficiency heat recovery heat pump.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] An enthalpy-increasing cold and hot full-energy recovery heat pump comprises a compressor, an outdoor heat exchanger, a heat recovery heat exchanger, an economizer, a first expansion valve, a second expansion valve, a first four-way valve, a second four-way valve and a third four-way valve;

[0008] The compressor is used to suck in a gaseous low-temperature refrigerant and compress it into a high-temperature and high-pressure gaseous refrigerant;

[0009] The outdoor heat exchanger is arranged outdoors and communicated with the exhaust port of the compressor to exchange heat between the refrigerant and the outdoor air;

[0010] The heat recovery heat exchanger is connected to the exhaust port of the compressor so as to condense and liquefy the compressed high-temperature and high-pressure gaseous refrigerant in the heat recovery heat exchanger, and the heat recovery heat exchanger is used to form a heat recovery cycle with the heat-using equipment;

[0011] The economizer is connected to the heat recovery heat exchanger or the outdoor heat exchanger to further cool the refrigerant after condensation and cooling in the heat recovery heat exchanger or cooling in the outdoor heat exchanger;

[0012] The first expansion valve and the second expansion valve are respectively connected to the main circuit of the economizer so that the refrigerant passing through the economizer is split and throttled and depressurized respectively;

[0013] The other end valve of the first expansion valve is used to communicate with the refrigeration equipment and / or the outdoor heat exchanger to allow the throttled and depressurized liquid refrigerant to absorb heat, and is connected to the air intake port of the compressor through the refrigeration equipment and / or the outdoor heat exchanger to form a refrigerant circulation loop;

[0014] The second expansion valve is reversely connected to the auxiliary circuit of the economizer so that the liquid refrigerant after throttling and decompression can further cool the liquid refrigerant in the positive flow main circuit, and the auxiliary circuit of the economizer is connected to the air supply port of the compressor so that the gaseous refrigerant in the reverse flow auxiliary circuit can return to the compressor to supply air and increase enthalpy of the compressor;

[0015] The first four-way valve, the second four-way valve and the third four-way valve are used to switch the connectivity between the compressor, the outdoor heat exchanger, the heat recovery heat exchanger and the economizer to change the flow direction of the refrigerant, so as to realize the separate recovery of heat in the heat recovery heat exchanger, or the separate recovery of cooling in the refrigeration equipment, or the simultaneous recovery of heat in the heat recovery heat exchanger and cooling in the refrigeration equipment, or the discharge of excess heat or excess cooling in the outdoor heat exchanger.

[0016] Preferably, a first one-way valve is further provided between the auxiliary circuit of the economizer and the air supply port of the compressor, and the first one-way valve is used to prevent the gaseous refrigerant in the compressor from flowing to the economizer.

[0017] Preferably, the economizer is provided with a first temperature sensor for detecting the main circuit temperature in the economizer and a second temperature sensor for detecting the auxiliary circuit temperature in the economizer, and the suction port of the compressor is provided with a pressure sensor for detecting the suction pressure.

[0018] Preferably, a drying filter is provided between the main circuit of the economizer and the first expansion valve and the second expansion valve, and the main circuit of the economizer is respectively connected to the first expansion valve and the second expansion valve after passing through the drying filter.

[0019] Preferably, it also includes a second one-way valve and a third one-way valve, the exhaust port of the compressor is connected to the main interface of the first four-way valve, the other three interfaces of the first four-way valve are respectively connected to an inlet and outlet of the outdoor heat exchanger, the main path of the heat recovery heat exchanger and the suction port of the compressor, the main path of the heat recovery heat exchanger is connected to the main path of the economizer, the auxiliary path of the heat recovery heat exchanger forms a heat recovery cycle with the heat-using equipment through a water pump, the first expansion valve is connected to the main interface of the second four-way valve, the other three interfaces of the second four-way valve are respectively connected to the inlet of the refrigeration equipment, the outlet of the refrigeration equipment and the main interface of the third four-way valve, the other three interfaces of the third four-way valve are respectively connected to another inlet and outlet of the outdoor heat exchanger, the main path of the heat recovery heat exchanger and the suction port of the compressor, the second one-way valve is arranged between the first four-way valve and the main path of the heat recovery heat exchanger, and the third one-way valve is arranged between the third four-way valve and the main path of the heat recovery heat exchanger.

[0020] Preferably, it also includes a second one-way valve and a third one-way valve, the exhaust port of the compressor is connected to the main circuit of the heat recovery heat exchanger, the main circuit of the heat recovery heat exchanger is connected to the main interface of the first four-way valve, the auxiliary circuit of the heat recovery heat exchanger forms a heat recovery cycle with the heat-using equipment through a water pump, the other three interfaces of the first four-way valve are respectively connected to an inlet and outlet of the outdoor heat exchanger, the main circuit of the economizer and the air intake of the compressor, the first expansion valve is connected to the main interface of the second four-way valve, the other three interfaces of the second four-way valve are respectively connected to the inlet of the refrigeration equipment, the outlet of the refrigeration equipment and the main interface of the third four-way valve, the other three interfaces of the third four-way valve are respectively connected to another inlet and outlet of the outdoor heat exchanger, the main circuit of the heat recovery heat exchanger and the air intake of the compressor, the second one-way valve is arranged between the first four-way valve and the main circuit of the economizer, and the third one-way valve is arranged between the third four-way valve and the main circuit of the economizer.

[0021] Preferably, a gas-liquid separator is provided at the air intake of the compressor, and the interface of the first four-way valve and the interface of the third four-way valve are both connected to the air intake of the compressor after passing through the gas-liquid separator.

[0022] Preferably, the compressor is arranged outdoors, and the heat recovery heat exchanger, economizer and water pump are arranged indoors.

[0023] Preferably, the compressor, heat recovery heat exchanger, water pump and economizer are all arranged indoors.

[0024] Preferably, the compressor, the heat recovery heat exchanger and the water pump are arranged outdoors, and the economizer is arranged indoors.

[0025] Due to the adoption of the above scheme, the heat pump with full energy efficiency recovery for both cooling and heating can meet the cooling demand of refrigeration equipment and the heating demand of heat-using equipment without being affected by the season. At the same time, by replenishing air and increasing enthalpy, it can effectively improve the cooling and heating efficiency of the equipment. Compared with the existing air source heat pump, it has the following advantages:

[0026] 1. Not affected by seasons, in winter, at low temperatures, this solution increases enthalpy and air supply, increases compressor exhaust volume, improves thermal efficiency, and is more suitable for low-temperature operation. The water pump is installed indoors and there is no risk of freezing. In the high-temperature period of summer, when the outdoor temperature is high and the outdoor condenser is not completely condensed, the Freon in the economizer is overcooled and then cooled down, which improves refrigeration efficiency and reduces system pressure;

[0027] 2. In this scheme, when the temperature at the heat recovery end is high, the Freon in the economizer is overcooled and then cooled down to improve the refrigeration efficiency;

[0028] 3. This solution can freely control and switch the use mode through three four-way valves without being affected by the season. After the mode is switched, the expansion valve will automatically adjust the opening according to the suction pressure, suction temperature, and the temperature of the main and auxiliary roads of the economizer to adapt to different use modes, effectively ensuring the normal operation of the equipment with a high degree of automation;

[0029] 4. This solution has low maintenance costs and few wearing parts. Freon at the low-temperature recovery end evaporates directly in the outdoor heat exchanger and exchanges heat with the air. There is no risk of freezing. There is only one water pump at the hot end, and the filter only needs to be cleaned once a year.

[0030] 5. This solution has a simple structure, few installation accessories, small volume requirements for outdoor heat exchangers and heat recovery heat exchangers, and a wide range of options, so the volume of the entire system can be made smaller;

[0031] 6. This solution has a wide range of applications and high refrigeration efficiency. The cold recovery end and the air heat exchange can produce a low temperature of minus 15 degrees. It can also be used in freezers, low-temperature freezing of seafood and meat, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a cycle schematic diagram of the all-round recycling mode of the first embodiment of the present invention;

[0033] Figure 2 is a cycle schematic diagram of the heating-only mode of the first embodiment of the present invention;

[0034] Figure 3 is a cycle schematic diagram of a single cooling mode of the first embodiment of the present invention;

[0035] Figure 4 is a cycle schematic diagram of the low cooling load mode of the first embodiment of the present invention;

[0036] Figure 5 1 is a schematic diagram of a cycle of the all-round recycling mode of the first structure of the second embodiment of the present invention;

[0037] Figure 6 is a cycle schematic diagram of a heating-only mode of the first structure of the second embodiment of the present invention;

[0038] Figure 7 is a cycle schematic diagram of a single refrigeration mode of the first structure of the second embodiment of the present invention;

[0039] Figure 8 1 is a cycle diagram of a cooling load too small mode of the first structure of the second embodiment of the present invention;

[0040] Fig. 9 Schematic diagram of the cycle of the first structure of the second embodiment of the present invention in the under-heat load mode

[0041] Fig.10 It is a structural diagram of a circulation system of the second structure of the second embodiment of the present invention. DETAILED DESCRIPTION

[0042] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0043] like Figures 1 to 10 As shown, an enthalpy-added cold and hot full-energy-efficiency recovery heat pump provided in an embodiment of the present invention comprises a compressor 1, an outdoor heat exchanger 2, a heat recovery heat exchanger 3, an economizer 4, a first expansion valve 5, a second expansion valve 6, a first four-way valve 7, a second four-way valve 8 and a third four-way valve 9;

[0044] The compressor 1 is mainly used to suck in the gaseous low-temperature refrigerant and compress it into a high-temperature and high-pressure gaseous refrigerant;

[0045] The outdoor heat exchanger 2 is arranged outdoors and is connected to the exhaust port of the compressor 1. The outdoor heat exchanger 2 is mainly used to exchange heat between the refrigerant and the outdoor air. The outdoor heat exchanger 2 can use a finned heat exchanger as required, and cooperate with the axial flow fan to operate to exchange heat with the outdoor air.

[0046] The heat recovery heat exchanger 3 is connected to the exhaust port of the compressor 1. The heat recovery heat exchanger 3 is mainly used to condense and liquefy the compressed high-temperature and high-pressure gaseous refrigerant in the heat recovery heat exchanger 3, and the heat recovery heat exchanger 3 is used to form a heat recovery cycle with heat-using equipment (such as a hot water storage tank, floor heating, etc.) (the heat recovery heat exchanger 3 is the heat recovery end); the heat recovery heat exchanger 3 can be set as a plate heat exchanger, a shell and tube heat exchanger, etc. according to the needs of on-site installation;

[0047] The economizer 4 is connected to the heat recovery heat exchanger 3 or the outdoor heat exchanger 2. The economizer 4 is mainly used to re-cool the refrigerant after condensation and cooling in the heat recovery heat exchanger 3 or cooling in the outdoor heat exchanger 2.

[0048] The first expansion valve 5 and the second expansion valve 6 are respectively connected to the main circuit of the economizer 4 so that the refrigerant passing through the economizer 4 is split and throttled and depressurized respectively;

[0049] The other end of the first expansion valve 5 is used to communicate with the refrigeration equipment and / or the outdoor heat exchanger 2 so that the throttled and depressurized liquid refrigerant absorbs heat, and is connected to the suction port of the compressor 1 through the refrigeration equipment (such as cold storage, freezer, refrigerator, air conditioner, etc., the refrigeration equipment is the cold recovery end) and / or the outdoor heat exchanger 2 to form a refrigerant circulation loop;

[0050] The second expansion valve 6 is connected to the auxiliary circuit of the economizer 4 in reverse flow so that the liquid refrigerant after throttling and decompression can further cool the liquid refrigerant in the positive flow main circuit. The auxiliary circuit of the economizer 4 is connected to the air supply port of the compressor 1 so that the gaseous refrigerant in the reverse flow auxiliary circuit can return to the compressor 1 to supply air and increase enthalpy of the compressor 1.

[0051] The first four-way valve 7, the second four-way valve 8 and the third four-way valve 9 are used to switch the connection relationship between the compressor 1, the outdoor heat exchanger 2, the heat recovery heat exchanger 3 and the economizer 4 to change the flow direction of the refrigerant to achieve the separate recovery of heat in the heat recovery heat exchanger 3, or to achieve the separate recovery of cooling in the refrigeration equipment, or to achieve the simultaneous recovery of heat in the heat recovery heat exchanger 3 and cooling in the refrigeration equipment, or to achieve the discharge of excess heat or excess cooling in the outdoor heat exchanger 2.

[0052] Therefore, during the use of the device, the heat recovery heat exchanger 3 can be used to exchange heat with the high-temperature and high-pressure gaseous refrigerant to achieve heat recovery, and the first expansion valve 5 can be used to cooperate with the refrigeration equipment to recover cold. In the process of heat recovery and / or cold recovery, the first expansion valve 5 and the second expansion valve 6 are used to cooperate to divert the refrigerant, one way passes through the first expansion valve 5 to enter the refrigeration equipment for evaporation and refrigeration, and the other way passes through the second expansion valve 6 to reversely return to the economizer 4, and returns to the air replenishment port of the compressor 1 through the economizer 4 to replenish air and increase enthalpy. In this way, whether in the heat recovery mode or the cold recovery mode, the compressor 1 can be replenished with air and increased enthalpy, the return air volume of the compressor 1 is increased, and the normal operation of the equipment is effectively guaranteed; at the same time, during the reverse flow of the refrigerant in the auxiliary path of the economizer 4, due to the action of the second expansion valve 6, the temperature of the reverse flow of the auxiliary path in the economizer 4 is lower than the positive flow temperature of the main path in the economizer 4, so that the reverse flow auxiliary path can further cool the positive flow main path, thereby improving the condensation degree and refrigeration capacity of the refrigerant, thereby improving the energy efficiency of the device. The existing cold and hot recovery heat pump has low cooling and heating efficiency, and has many installation accessories. It has many requirements and restrictions on the types of outdoor heat exchanger 2 and heat recovery heat exchanger 3, and the volume is large. The heat pump provided by the present invention has low requirements and restrictions on the outdoor heat exchanger 2 and the heat recovery heat exchanger 3, so the volume of the entire system can be very small. The cold recovery end of the existing cold and hot recovery heat pump exchanges heat with water, and can only produce chilled water at about 7 degrees, so it is only suitable for air conditioning refrigeration, while the refrigeration energy efficiency of the present application is high, and the cold recovery end exchanges heat with air to produce a low temperature of minus 15 degrees, so it can also be used in freezers, low-temperature freezing of seafood and meat, etc. By switching the first four-way valve 7, the second four-way valve 8 and the third four-way valve 9, the connection relationship between the compressor 1, the outdoor heat exchanger 2, the heat recovery heat exchanger 3 and the economizer 4 can be changed to change the flow direction of the refrigerant and realize the discharge of excess heat or excess cold in the outdoor heat exchanger 2, so that heat recovery can be carried out separately, or cold recovery can be carried out separately, or heat recovery and cold recovery modes can be carried out simultaneously, and automatic selection and switching between these modes can be realized.

[0053] First embodiment

[0054] like Figure 1-Figure 4As shown, the first enthalpy-added cold and hot full-efficiency recovery heat pump provided in the embodiment of the present invention comprises a compressor 1, an outdoor heat exchanger 2, a heat recovery heat exchanger 3, an economizer 4, a first expansion valve 5, a second expansion valve 6, a first four-way valve 7, a second four-way valve 8, a third four-way valve 9, a first check valve 10, a second check valve 11 and a third check valve 12, the exhaust port of the compressor 1 is connected to the main interface of the first four-way valve 7, and the other three interfaces of the first four-way valve 7 are respectively connected to an inlet and outlet of the outdoor heat exchanger 2, the main circuit of the heat recovery heat exchanger 3 and the compressor 1 The main circuit of the heat recovery heat exchanger 3 is connected to the main circuit of the economizer 4, and the auxiliary circuit of the heat recovery heat exchanger 3 forms a heat recovery cycle (i.e., a heat recovery end) with the heat-using equipment through a water pump 13. The first expansion valve 5 is connected to the main interface of the second four-way valve 8, and the other three interfaces of the second four-way valve 8 are respectively connected to the inlet of the refrigeration equipment, the outlet of the refrigeration equipment and the main interface of the third four-way valve 9, and the other three interfaces of the third four-way valve 9 are respectively connected to another inlet and outlet of the outdoor heat exchanger 2, the main circuit of the heat recovery heat exchanger 3 and the compressor 1. The air inlet of the compressor 1 is connected; the first one-way valve 10 is arranged between the third four-way valve 9 and the main circuit of the heat recovery heat exchanger 3 to prevent the gaseous refrigerant in the compressor 1 from flowing back to the economizer 4, the second one-way valve 11 is arranged between the first four-way valve 7 and the main circuit of the heat recovery heat exchanger 3, and the third one-way valve 12 is arranged between the third four-way valve 9 and the main circuit of the heat recovery heat exchanger 3; the economizer 4 is provided with a first temperature sensor for detecting the temperature of the main circuit in the economizer 4 and a second temperature sensor for detecting the temperature of the auxiliary circuit in the economizer 4, and the air inlet of the compressor 1 is arranged There is an air pressure sensor for detecting the suction pressure; a drying filter 14 is arranged between the main circuit of the economizer 4 and the first expansion valve 5 and the second expansion valve 6, and the main circuit of the economizer 4 is connected with the first expansion valve 5 and the second expansion valve 6 respectively after passing through the drying filter 14; a vapor-liquid separator 15 is arranged at the suction port of the compressor 1, and the interface of the first four-way valve 7 and the interface of the third four-way valve 9 are connected with the suction port of the compressor 1 after passing through the vapor-liquid separator 15; the compressor 1 is arranged outdoors, and the heat recovery heat exchanger 3, the economizer 4 and the water pump 13 are arranged indoors.

[0055] Based on the above structural arrangement, the recovery heat pump of this embodiment has four usage modes: full recovery mode, heating-only mode, cooling-only mode and low cooling load mode.

[0056] 1. All-round recycling mode: Figure 1As shown, in this mode, the refrigerant (Freon) flows out from the exhaust port of the compressor 1 through the switching control of the first four-way valve 7, the second four-way valve 8 and the third four-way valve 9, and flows to the main path of the heat recovery heat exchanger 3 through the first four-way valve 7 (and the second one-way valve 11). At this time, the water pump 13 is turned on, and the heat recovery cycle recovers heat in the auxiliary path of the heat recovery heat exchanger 3; and the refrigerant flows from the main path of the heat recovery heat exchanger 3 to the main path of the economizer 4, and is divided into two paths after coming out from the main path of the economizer 4 and passing through the drying filter 14. One path goes back to the auxiliary circuit of economizer 4 through the second expansion valve 6, and then goes back to the air supply port of compressor 1 through the auxiliary circuit of economizer 4 (and the first non-return valve 10) to supply air and increase enthalpy, forming an air supply cycle to increase the compression capacity of compressor 1; the other path goes to the refrigeration equipment through the first expansion valve 5 and the second four-way valve 8, evaporates and absorbs heat in the refrigeration equipment, and recovers cold capacity; after the refrigerant comes out of the refrigeration equipment, it goes back to the air intake port of compressor 1 through the second four-way valve 8, the third four-way valve 9 and the vapor-liquid separator 15 in sequence to be recompressed. At this time, the outdoor heat exchanger 2 does not pass the refrigerant, and does not need to exchange heat with the outdoor air, so that all the heat absorbed in the refrigeration equipment can be used to prepare hot water in the heat recovery cycle.

[0057] In the process of continuous heating of the heat recovery cycle formed by the water pump 13 and the auxiliary circuit of the heat recovery heat exchanger 3 (or when the heat-using equipment does not use the hot water in the heat recovery cycle in time), the temperature of the auxiliary circuit of the heat exchanger will gradually increase, which may cause the refrigerant in the heat recovery heat exchanger 3 to be not condensed and liquefied thoroughly, and may cause the system refrigeration energy efficiency to deteriorate. At this time, the refrigerant in the auxiliary circuit of the economizer 4 can be further cooled by the second expansion valve 6 to reduce pressure and temperature, so that in the process of reverse flow of the auxiliary circuit of the economizer 4, the refrigerant in the positive flow main circuit can be cooled, while the refrigerant in the auxiliary circuit itself is heated and vaporized, and returns to the compressor 1 to replenish air and increase enthalpy of the compressor 1, thereby increasing the compression volume of the compressor 1, thereby improving the overall refrigeration and heating efficiency of the equipment. Therefore, the device can be unaffected by seasonal high temperatures.

[0058] 2. Heating mode only: Figure 2As shown, in this mode, the refrigerant (Freon) flows out from the exhaust port of the compressor 1 through the switching control of the first four-way valve 7, the second four-way valve 8 and the third four-way valve 9, and flows to the main path of the heat recovery heat exchanger 3 through the first four-way valve 7 (and the second one-way valve 11). At this time, the water pump 13 is turned on, and the heat recovery cycle recovers heat in the auxiliary path of the heat recovery heat exchanger 3; and the refrigerant flows from the main path of the heat recovery heat exchanger 3 to the main path of the economizer 4, and is divided into There are two routes, one of which is to return to the auxiliary route of economizer 4 through the second expansion valve 6, and then return to the air supply port of compressor 1 through the auxiliary route of economizer 4 (and the first non-return valve 10) to supply air and increase enthalpy, forming an air supply cycle; the other route is to flow to outdoor heat exchanger 2 through the first expansion valve 5, the second four-way valve 8 and the third four-way valve 9 in sequence, and exchange heat with outdoor air in the outdoor heat exchanger 2, dissipating the cold into the air, while the refrigerant itself absorbs heat and vaporizes, and then returns to the air intake port of compressor 1 through the first four-way valve 7 and the vapor-liquid separator 15 for recompression. At this time, the refrigeration equipment is not used, and the indoor cooling capacity is not recovered.

[0059] If the outside temperature is too low, the refrigerant cannot absorb heat during the heat exchange between the outdoor heat exchanger 2 and the outdoor air, which may easily lead to the retention of liquid refrigerant in the outdoor heat exchanger 2, which may easily lead to insufficient gas volume returning to the compressor 1, and the system heating efficiency will deteriorate. At this time, the opening of the second expansion valve 6 can be adjusted to increase the amount of refrigerant in the auxiliary circuit of the economizer 4, thereby increasing the amount of refrigerant in the auxiliary circuit returning to the air supply port of the compressor 1, replenishing air and increasing enthalpy for the compressor 1, effectively ensuring the compression volume in the compressor 1, enhancing the heating capacity of the system, and improving and ensuring the heating efficiency of the equipment. Therefore, the device can also be unaffected by seasonal low temperatures.

[0060] 3. Single cooling mode: Figure 3 As shown, in this mode, the refrigerant (Freon) flows out from the exhaust port of the compressor 1 through the switching control of the first four-way valve 7, the second four-way valve 8 and the third four-way valve 9, and flows to the outdoor heat exchanger 2 through the first four-way valve 7, exchanges heat with the outdoor air in the outdoor heat exchanger 2, and dissipates the heat into the air, while the refrigerant itself is condensed and liquefied and is retained in the main circuit of the heat recovery heat exchanger 3 through the third four-way valve 9. At this time, the water pump 13 is turned off, the heat recovery cycle stops working, and the indoor heating is not recovered; and the refrigerant is discharged from the heat recovery heat exchanger After coming out of the main path 3, it flows to the main path of the economizer 4. After coming out of the main path of the economizer 4 and passing through the drying filter 14, it is divided into two paths. One path passes through the second expansion valve 6 and the auxiliary path of the economizer 4 and returns to the compressor 1 for air replenishment and enthalpy increase; the other path passes through the first expansion valve 5 and the second four-way valve 8 to flow to the refrigeration equipment, absorbs heat and refrigerates in the refrigeration equipment to recover cold; and after the refrigerant comes out of the refrigeration equipment, it passes through the second four-way valve 8, the third four-way valve 9 and the vapor-liquid separator 15 in sequence and returns to the suction port of the compressor 1 for recompression.

[0061] 4. Low cooling load mode: Figure 4 As shown, in this mode, the refrigerant (Freon) flows out from the exhaust port of the compressor 1 through the switching control of the first four-way valve 7, the second four-way valve 8 and the third four-way valve 9, and flows to the main path of the heat recovery heat exchanger 3 through the first four-way valve 7 (and the second one-way valve 11). At this time, the water pump 13 is turned on, and the heat recovery cycle recovers heat in the auxiliary path of the heat recovery heat exchanger 3; and the refrigerant flows from the main path of the heat recovery heat exchanger 3 to the main path of the economizer 4, and is divided into two paths after coming out from the main path of the economizer 4 and passing through the drying filter 14, one of which passes through the second expansion valve 6 and returns to the auxiliary path of the economizer 4 The refrigerant returns to the air inlet of the compressor 1 to replenish air and increase enthalpy; the other way flows to the refrigeration equipment through the first expansion valve 5 and the second four-way valve 8, evaporates and absorbs heat in the refrigeration equipment, and recovers cold; when the cold load is too small, the excess cold in the refrigerant coming out of the refrigeration equipment flows to the outdoor heat exchanger 2 through the second four-way valve 8 and the third four-way valve 9 in turn, exchanges heat with the outdoor air in the outdoor heat exchanger 2, and releases the excess cold to the air, while the refrigerant itself absorbs heat and vaporizes, then passes through the first four-way valve 7 and the vapor-liquid separator 15 and returns to the air intake of the compressor 1 for recompression. At this time, the outdoor heat exchanger 2 can release the excess cold to the outdoor air, ensuring that enough refrigerant vaporizes and returns to the compressor 1, ensuring the cooling and heating energy efficiency of the system.

[0062] The first one-way valve 10 in this embodiment is used to prevent the gaseous refrigerant in the compressor 1 from flowing to the economizer 4. This prevents the gaseous refrigerant from returning to the auxiliary circuit of the economizer 4, which results in the failure of the refrigerant counterflow cooling effect in the auxiliary circuit of the economizer 4. The second one-way valve 11 and the third one-way valve 12 can effectively prevent the refrigerant from flowing back and prevent the first four-way valve 7 and the third four-way valve 9 from cross-flowing.

[0063] In this embodiment, the first temperature sensor for detecting the main line temperature in the economizer 4, the second temperature sensor for detecting the auxiliary line temperature in the economizer 4, and the air pressure sensor for detecting the suction pressure are all for facilitating automatic adjustment of the opening of the second expansion valve 6.

[0064] In this embodiment, the dry filter 14 is mainly used to filter impurities and moisture in the system to prevent impurities from clogging the throttle port and to prevent moisture from freezing and clogging the throttle port.

[0065] The vapor-liquid separator 15 in this embodiment is used to prevent the refrigerant liquid from directly returning to the compressor 1 and causing damage to the compressor 1 .

[0066] In this embodiment, the heat recovery heat exchanger 3 and the water pump 13 are arranged indoors, which can effectively prevent them from being frozen in winter.

[0067] Second embodiment

[0068] like Figure 5-Figure 10 As shown, the first enthalpy-added cold and hot full-energy-efficiency recovery heat pump provided in the embodiment of the present invention comprises a compressor 1, an outdoor heat exchanger 2, a heat recovery heat exchanger 3, an economizer 4, a first expansion valve 5, a second expansion valve 6, a first four-way valve 7, a second four-way valve 8, a third four-way valve 9, a first check valve 10, a second check valve 11 and a third check valve 12; the exhaust port of the compressor 1 is connected to the main circuit of the heat recovery heat exchanger 3, the main circuit of the heat recovery heat exchanger 3 is connected to the main interface of the first four-way valve 7, and the auxiliary circuit of the heat recovery heat exchanger 3 is connected to the main interface of the first four-way valve 7. A heat recovery cycle (i.e., a heat recovery end) is formed with the heat-using equipment through a water pump 13. The other three interfaces of the first four-way valve 7 are respectively connected to an inlet and outlet of the outdoor heat exchanger 2, the main road of the economizer 4, and the air intake of the compressor 1. The first expansion valve 5 is connected to the main interface of the second four-way valve 8. The other three interfaces of the second four-way valve 8 are respectively connected to the inlet of the refrigeration equipment, the outlet of the refrigeration equipment, and the main interface of the third four-way valve 9. The other three interfaces of the third four-way valve 9 are respectively connected to another inlet and outlet of the outdoor heat exchanger 2, the main road of the heat recovery heat exchanger 3, and the air intake of the compressor 1; the first check valve 10 is arranged between the third four-way valve 9 and the main road of the heat recovery heat exchanger 3 to prevent the gaseous refrigerant in the compressor 1 from flowing back to the economizer 4, the second check valve 11 is arranged between the first four-way valve 7 and the main road of the economizer 4, and the third check valve 12 is arranged between the third four-way valve 9 and the main road of the economizer 4; the economizer 4 is provided with a first temperature sensor for detecting the temperature of the main road in the economizer 4 and a temperature sensor for detecting the temperature of the main road in the economizer 4. A second temperature sensor for the auxiliary circuit temperature, a pressure sensor for detecting the suction pressure is provided at the suction port of the compressor 1; a drying filter 14 is provided between the main circuit of the economizer 4 and the first expansion valve 5 and the second expansion valve 6, and the main circuit of the economizer 4 is connected to the first expansion valve 5 and the second expansion valve 6 respectively after passing through the drying filter 14; a vapor-liquid separator 15 is provided at the suction port of the compressor 1, and the interface of the first four-way valve 7 and the interface of the third four-way valve 9 are both connected to the suction port of the compressor 1 after passing through the vapor-liquid separator 15.

[0069] Based on the above structural arrangement, the layout of the recovery heat pump of this embodiment is different from that of the first embodiment in that the refrigerant coming out of the exhaust port of the compressor can first pass through the heat recovery heat exchanger and then pass through the outdoor heat exchanger, which makes the recovery heat pump of this embodiment have five usage modes: full recovery mode, heating mode only, cooling mode only, cooling load too small mode and heating load too small mode.

[0070] 1. All-round recycling mode: Figure 5As shown, in this mode, the refrigerant (Freon) flows directly into the main circuit of the heat recovery heat exchanger 3 after flowing out from the exhaust port of the compressor 1 through the switching control of the first four-way valve 7, the second four-way valve 8 and the third four-way valve 9. At this time, the water pump 13 is turned on, and the heat recovery cycle recovers heat in the auxiliary circuit of the heat recovery heat exchanger 3; and the refrigerant flows to the main circuit of the economizer 4 through the first four-way valve 7 (and the second one-way valve 11) after coming out of the main circuit of the heat recovery heat exchanger 3, and is divided into two circuits after coming out of the main circuit of the economizer 4 and passing through the drying filter 14. One circuit passes through the second expansion valve 6 to return to the auxiliary circuit of the economizer 4, and passes through the auxiliary circuit of the economizer 4 (and the first one-way valve 10) to return to the compressor 1 for air replenishment and enthalpy increase; the other circuit passes through the first expansion valve 5 and the second four-way valve 8 to flow to the refrigeration equipment, evaporates and absorbs heat in the refrigeration equipment, and recovers cold; and after the refrigerant comes out of the refrigeration equipment, it passes through the second four-way valve 8, the third four-way valve 9 and the vapor-liquid separator 15 in sequence to return to the suction port of the compressor 1 for recompression. At this time, the outdoor outdoor heat exchanger 2 does not pass through the refrigerant and does not need to exchange heat with the outdoor air, so that the heat absorbed by the refrigeration equipment can be used to prepare hot water in the heat recovery cycle. The principle of improving the overall energy efficiency of refrigeration and heating of the equipment is basically the same as the full energy recovery mode in the first embodiment.

[0071] 2. Heating mode only: Figure 6 As shown, in this mode, the refrigerant (Freon) flows out of the exhaust port of the compressor 1 and directly flows into the main path of the heat recovery heat exchanger 3 through the switching control of the first four-way valve 7, the second four-way valve 8 and the third four-way valve 9. At this time, the water pump 13 is turned on, and the heat recovery cycle recovers heat in the auxiliary path of the heat recovery heat exchanger 3; and the refrigerant flows out of the main path of the heat recovery heat exchanger 3 through the first four-way valve 7 (and the second one-way valve 11) to the main path of the economizer 4, and flows out of the main path of the economizer 4 and passes through the drying filter After 14, it is divided into two paths, one path returns to the auxiliary path of the economizer 4 through the second expansion valve 6, and returns to the compressor 1 through the auxiliary path of the economizer 4 (and the first non-return valve 10) to replenish air and increase enthalpy; the other path flows to the outdoor heat exchanger 2 through the first expansion valve 5, the second four-way valve 8 and the third four-way valve 9 in sequence, exchanges heat with the outdoor air in the outdoor heat exchanger 2, and dissipates the cold into the air, while the refrigerant itself absorbs heat and vaporizes, and then returns to the suction port of the compressor 1 through the first four-way valve 7 and the vapor-liquid separator 15 for recompression. At this time, the refrigeration equipment is not used, and the indoor cooling capacity is not recovered. The principle of enhancing the heating capacity of the system and improving and ensuring the heating energy efficiency of the equipment is basically the same as the single heating mode in the first embodiment.

[0072] 3. Single cooling mode: Figure 7As shown, in this mode, through the switching control of the first four-way valve 7, the second four-way valve 8 and the third four-way valve 9, the refrigerant (Freon) flows out from the exhaust port of the compressor 1, and then flows to the outdoor heat exchanger 2 through the main circuit of the heat recovery heat exchanger 3 and the first four-way valve 7 in sequence. At this time, the water pump 13 is turned off, the heat recovery cycle stops working, the heat recovery heat exchanger 3 does not recover the heating amount, and exchanges heat with the outdoor air in the outdoor heat exchanger 2 to dissipate the heat into the air, while the refrigerant itself is condensed and liquefied and passes through the third four-way valve 9 is retained in the main circuit of the economizer 4, and is divided into two circuits after exiting from the main circuit of the economizer 4 and passing through the drying filter 14. One circuit passes through the second expansion valve 6 and the auxiliary circuit of the economizer 4, and returns to the compressor 1 for air replenishment and enthalpy increase; the other circuit passes through the first expansion valve 5 and the second four-way valve 8 to flow to the refrigeration equipment, absorbs heat and refrigerates in the refrigeration equipment, and recovers cold capacity; and after the refrigerant comes out of the refrigeration equipment, it passes through the second four-way valve 8, the third four-way valve 9 and the vapor-liquid separator 15 in sequence and returns to the air intake of the compressor 1 for recompression. Its refrigeration principle is basically the same as the single refrigeration mode in the first embodiment.

[0073] 4. Low cooling load mode: Figure 8 As shown, in this mode, the refrigerant (Freon) flows out of the exhaust port of the compressor 1 and directly flows into the main path of the heat recovery heat exchanger 3 through the switching control of the first four-way valve 7, the second four-way valve 8 and the third four-way valve 9. At this time, the water pump 13 is turned on, and the heat recovery cycle recovers heat in the auxiliary path of the heat recovery heat exchanger 3; and the refrigerant flows out of the main path of the heat recovery heat exchanger 3 through the first four-way valve 7 (and the second one-way valve 11) to the main path of the economizer 4, and is divided into two paths after coming out of the main path of the economizer 4 and passing through the drying filter 14, one path passes through the second expansion valve 6 and returns to the economizer 4 The auxiliary route returns to the air supply port of the compressor 1 to supply air and increase enthalpy; the other route flows to the refrigeration equipment through the first expansion valve 5 and the second four-way valve 8, evaporates and absorbs heat in the refrigeration equipment, and recovers cold; when the cold load is too small, the excess cold in the refrigerant coming out of the refrigeration equipment flows to the outdoor heat exchanger 2 through the second four-way valve 8 and the third four-way valve 9 in turn, exchanges heat with the outdoor air in the outdoor heat exchanger 2, and releases the cold to the air, while the refrigerant itself absorbs heat and vaporizes, then passes through the first four-way valve 7 and the vapor-liquid separator 15 and returns to the air intake port of the compressor 1 for recompression. At this time, the outdoor heat exchanger 2 can release the excess cold to the outdoor air, ensuring that enough refrigerant vaporizes and returns to the compressor 1, ensuring the cooling and heating energy efficiency of the system.

[0074] 5. Heat load too small mode: such as Fig. 9As shown, in this mode, the refrigerant (Freon) flows out of the exhaust port of the compressor 1 and directly flows into the main circuit of the heat recovery heat exchanger 3 through the switching control of the first four-way valve 7, the second four-way valve 8 and the third four-way valve 9. At this time, the water pump 13 is turned on, and the heat recovery cycle recovers heat in the auxiliary circuit of the heat recovery heat exchanger 3. In the heat load too small mode, the excess heat in the refrigerant flows out of the main circuit of the heat recovery heat exchanger 3 with the refrigerant, flows through the first four-way valve 7 to the outdoor heat exchanger 2, exchanges heat with the outdoor air in the outdoor heat exchanger 2, and dissipates the excess heat into the air. The refrigerant itself is condensed and liquefied and is retained in the main circuit of the economizer 4 through the third four-way valve 9; after coming out of the main circuit of the economizer 4 and passing through the drying filter 14, it is divided into two circuits, one of which is returned to the auxiliary circuit of the economizer 4 through the second expansion valve 6 and returned to the air supply port of the compressor 1 for air supply and enthalpy increase; the other circuit is passed through the first expansion valve 5 and the second four-way valve 8 to flow to the refrigeration equipment, where it evaporates and absorbs heat to recover cold; and after coming out of the refrigeration equipment, the refrigerant is returned to the suction port of the compressor 1 through the second four-way valve 8, the third four-way valve 9 and the vapor-liquid separator 15 in sequence for recompression.

[0075] Further, as another preferred embodiment, Figure 5-Figure 9 As shown, the compressor 1, the heat recovery heat exchanger 3, the water pump 13 and the economizer 4 are all arranged indoors. Such an arrangement is beneficial to prevent the heat recovery heat exchanger 3 and the water pump 13 from being frozen in winter.

[0076] Further, as one of the preferred solutions, Fig.10 As shown, the compressor 1, the heat recovery heat exchanger 3 and the water pump 13 are arranged outdoors, and the economizer 4 is arranged indoors. Such an arrangement is conducive to reducing indoor noise.

[0077] Through the above two embodiments, it can be seen that the heat pump with full energy efficiency recovery of cold and hot water of the present invention can meet the cooling demand of refrigeration equipment and the heating demand of heat-using equipment without being affected by seasons. At the same time, it can effectively improve the energy efficiency of the equipment by increasing enthalpy through air supplement. Compared with the existing air source heat pump, it has the following advantages:

[0078] 1. Not affected by seasons, in winter at low temperatures, this solution increases enthalpy and air replenishment, increases the exhaust volume of compressor 1, improves thermal efficiency, and is more suitable for low-temperature operation. The water pump 13 is installed indoors and there is no danger of freezing. In the high-temperature period of summer, when the outdoor temperature is high and the outdoor condenser is not completely condensed, the Freon in the economizer 4 is overcooled and then cooled down, which improves the refrigeration efficiency and reduces the system pressure;

[0079] 2. In this scheme, when the temperature at the heat recovery end is high, the Freon in the economizer 4 is overcooled and then cooled down to improve the refrigeration efficiency;

[0080] 3. This solution can freely control and switch the use mode through three four-way valves without being affected by the season. After the mode is switched, the expansion valve will automatically adjust the opening according to the suction pressure, suction temperature, and the temperature of the main and auxiliary roads of the economizer to adapt to different use modes, effectively ensuring the normal operation of the equipment with a high degree of automation;

[0081] 4. This solution has low maintenance costs and few wearing parts. The Freon at the low-temperature recovery end evaporates directly in the outdoor heat exchanger 2 and exchanges heat with the air. There is no risk of freezing. There is only one water pump 13 at the hot end, and the filter only needs to be cleaned once a year.

[0082] 5. This solution has a simple structure, few installation accessories, and the volume type requirements of the outdoor heat exchanger and the heat recovery heat exchanger are very small. A range of models can be selected, so the volume of the entire system can be made smaller;

[0083] 6. This solution has a wide range of applications. The cold recovery end and the air heat exchange can produce a low temperature of minus 15 degrees Celsius, so it can also be used in freezers, low-temperature freezing of seafood and meat, etc.

[0084] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An enthalpy-increasing type cold and hot full energy efficiency recovery heat pump, characterized in that: It includes a compressor, an outdoor heat exchanger, a heat recovery heat exchanger, an economizer, a first expansion valve, a second expansion valve, a first four-way valve, a second four-way valve and a third four-way valve; The compressor is used to suck in a gaseous low-temperature refrigerant and compress it into a high-temperature and high-pressure gaseous refrigerant; The outdoor heat exchanger is arranged outdoors and communicated with the exhaust port of the compressor to exchange heat between the refrigerant and the outdoor air; The heat recovery heat exchanger is connected to the exhaust port of the compressor so as to condense and liquefy the compressed high-temperature and high-pressure gaseous refrigerant in the heat recovery heat exchanger, and the heat recovery heat exchanger is used to form a heat recovery cycle with the heat-using equipment; The economizer is connected to the heat recovery heat exchanger or the outdoor heat exchanger to further cool the refrigerant after condensation and cooling in the heat recovery heat exchanger or cooling in the outdoor heat exchanger; The first expansion valve and the second expansion valve are respectively connected to the main circuit of the economizer so that the refrigerant passing through the economizer is split and throttled and depressurized respectively; The other end valve of the first expansion valve is used to communicate with the refrigeration equipment and / or the outdoor heat exchanger to allow the throttled and depressurized liquid refrigerant to absorb heat, and is connected to the air intake port of the compressor through the refrigeration equipment and / or the outdoor heat exchanger to form a refrigerant circulation loop; The second expansion valve is reversely connected to the auxiliary circuit of the economizer so that the liquid refrigerant after throttling and decompression can further cool the liquid refrigerant in the positive flow main circuit, and the auxiliary circuit of the economizer is connected to the air supply port of the compressor so that the gaseous refrigerant in the reverse flow auxiliary circuit can return to the compressor to supply air and increase enthalpy of the compressor; The first four-way valve, the second four-way valve and the third four-way valve are used to switch the connection relationship between the compressor, the outdoor heat exchanger, the heat recovery heat exchanger and the economizer to change the flow direction of the refrigerant to achieve separate recovery of heat in the heat recovery heat exchanger, or separate recovery of cooling capacity in the refrigeration equipment, or simultaneous recovery of heat in the heat recovery heat exchanger and cooling capacity in the refrigeration equipment, or discharge of excess heat or excess cooling capacity in the outdoor heat exchanger; A first one-way valve is also provided between the auxiliary circuit of the economizer and the air supply port of the compressor, and the first one-way valve is used to prevent the gaseous refrigerant in the compressor from flowing to the economizer; It also includes a second one-way valve and a third one-way valve, the exhaust port of the compressor is connected to the main interface of the first four-way valve, the other three interfaces of the first four-way valve are respectively connected to an inlet and outlet of the outdoor heat exchanger, the main road of the heat recovery heat exchanger and the air intake of the compressor, the main road of the heat recovery heat exchanger is connected to the main road of the economizer, the auxiliary road of the heat recovery heat exchanger forms a heat recovery cycle with the heat-using equipment through a water pump, the first expansion valve is connected to the main interface of the second four-way valve, the other three interfaces of the second four-way valve are respectively connected to the inlet of the refrigeration equipment, the outlet of the refrigeration equipment and the main interface of the third four-way valve, the other three interfaces of the third four-way valve are respectively connected to another inlet and outlet of the outdoor heat exchanger, the main road of the heat recovery heat exchanger and the air intake of the compressor, the second one-way valve is arranged between the first four-way valve and the main road of the heat recovery heat exchanger, and the third one-way valve is arranged between the third four-way valve and the main road of the heat recovery heat exchanger; It also includes a second one-way valve and a third one-way valve, the exhaust port of the compressor is connected to the main circuit of the heat recovery heat exchanger, the main circuit of the heat recovery heat exchanger is connected to the main interface of the first four-way valve, the auxiliary circuit of the heat recovery heat exchanger forms a heat recovery cycle with the heat-using equipment through a water pump, the other three interfaces of the first four-way valve are respectively connected to an inlet and outlet of the outdoor heat exchanger, the main circuit of the economizer and the air intake of the compressor, the first expansion valve is connected to the main interface of the second four-way valve, the other three interfaces of the second four-way valve are respectively connected to the inlet of the refrigeration equipment, the outlet of the refrigeration equipment and the main interface of the third four-way valve, the other three interfaces of the third four-way valve are respectively connected to another inlet and outlet of the outdoor heat exchanger, the main circuit of the heat recovery heat exchanger and the air intake of the compressor, the second one-way valve is arranged between the first four-way valve and the main circuit of the economizer, and the third one-way valve is arranged between the third four-way valve and the main circuit of the economizer.

2. The enthalpy-increasing type cold and hot full energy efficiency recovery heat pump according to claim 1, characterized in that: The economizer is provided with a first temperature sensor for detecting the main circuit temperature in the economizer and a second temperature sensor for detecting the auxiliary circuit temperature in the economizer, and the suction port of the compressor is provided with a pressure sensor for detecting the suction pressure.

3. The enthalpy-increasing type cold and hot full energy efficiency recovery heat pump according to claim 1, characterized in that: A drying filter is arranged between the main circuit of the economizer and the first expansion valve and the second expansion valve. The main circuit of the economizer is connected to the first expansion valve and the second expansion valve respectively after passing through the drying filter.

4. The enthalpy-increasing type cold and hot full energy efficiency recovery heat pump according to claim 1, characterized in that: A gas-liquid separator is provided at the air intake of the compressor, and the interface of the first four-way valve and the interface of the third four-way valve are both connected to the air intake of the compressor through the gas-liquid separator.

5. The enthalpy-increasing type cold and hot full energy efficiency recovery heat pump according to claim 1, characterized in that: The compressor is arranged outdoors, and the heat recovery heat exchanger, economizer and water pump are arranged indoors.

6. The enthalpy-increasing type cold and hot full energy efficiency recovery heat pump according to claim 1, characterized in that: The compressor, heat recovery heat exchanger, water pump and economizer are all arranged indoors.

7. The enthalpy-increasing type cold and hot full energy efficiency recovery heat pump according to claim 1, characterized in that: The compressor, the heat recovery heat exchanger and the water pump are arranged outdoors, and the economizer is arranged indoors.

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