Refrigerant circulation system of low-environment-temperature air source heat pump water heater

Abstract

The utility model relates to the technical field of air source heat pump water heaters, and discloses a low-environment-temperature air source heat pump water heater refrigerant circulation system which comprises a bottom plate located at the bottom of an air source heat pump water heater, and a compressor, a tank type heat exchanger, a plate type heat exchanger, a fin type heat exchanger and a gas-liquid separator are installed on the top of the bottom plate. Buffering assemblies are arranged at the bottom of the bottom plate. By optimizing a refrigerant circulation path and introducing an enhanced vapor injection process, the heating performance of the heat pump air conditioning unit in an ultralow-temperature environment can be remarkably improved, latent heat and sensible heat of a refrigerant are effectively utilized, and therefore the energy efficiency of a whole heat pump system can be improved, and the service life of the heat pump air conditioning unit is prolonged. According to the air source heat pump water heater, the heating capacity of the air source heat pump water heater is increased, improvement is particularly obvious under the low environment temperature, a heat pump system can efficiently operate within the wider temperature range, and in the cold season, a user can obtain the needed hot water or heat supply effect more quickly.

Description

TECHNICAL FIELD

[0001] The utility model relates to air source heat pump water heater technical field, concretely is a low ambient temperature air source heat pump water heater refrigerant circulation system. BACKGROUND

[0002] Air source heat pump water heater is a kind of energy-saving and environment-friendly hot water supply device that can replace boiler and is not limited by resources, it uses green and non-polluting cold coal, extracts the heat in air, produces more than 50 degrees of domestic hot water through the work of compressor, and C.O.P reaches more than 3.0 all year round.Air source heat pump water heater is suitable for indoor swimming pool, hotel, villa, hair salon, foot bath and massage, factory, school and farm and other places needing hot water supply.

[0003] Traditional air source heat pump air conditioning unit has low working efficiency and poor heating capacity when ambient temperature is low, cannot meet the heating demand of terminal customer, especially when ambient temperature is very low, it is difficult to produce hot water with suitable temperature, therefore, a low ambient temperature air source heat pump water heater refrigerant circulation system is provided. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of low ambient temperature air source heat pump water heater refrigerant circulation system to solve the problems in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of low ambient temperature air source heat pump water heater refrigerant circulation system, including the bottom plate in the bottom of air source heat pump water heater, the bottom plate top is respectively equipped with compressor, tank heat exchanger, plate heat exchanger, fin heat exchanger, gas-liquid separator;

[0006] The bottom of the bottom plate is provided with a buffer assembly;

[0007] The H end of the exhaust port of the compressor is communicated with the D end of the four-way valve through copper pipe, and the refrigerant outlet end of the tank heat exchanger is communicated with the main road M end of the plate heat exchanger through copper pipe respectively and the second electronic expansion valve;

[0008] The main road N end of the plate heat exchanger is communicated with the inlet end of the fin heat exchanger through copper pipe and the first electronic expansion valve, and the inlet end and outlet end of the first electronic expansion valve and the second electronic expansion valve are communicated with the filter through copper pipe.

[0009] As preferred, the above-mentioned: the enthalpy increasing port I end of the compressor is communicated with the auxiliary road Q end of the plate heat exchanger through copper pipe, and the suction port L end of the compressor is communicated with the outlet end of the gas-liquid separator through copper pipe.

[0010] As preferred, the C end of the four-way valve is connected to the refrigerant inlet end of the tank heat exchanger through a copper pipe, and the S end of the four-way valve is connected to the inlet end of the gas-liquid separator through a copper pipe.

[0011] As preferred, the E end of the four-way valve is connected to the outlet end of the fin heat exchanger through a copper pipe.

[0012] As preferred, the tank heat exchanger is provided with a water outlet pipe and a water inlet pipe on one side.

[0013] As preferred, the buffer assembly includes two rubber plates, the top of the rubber plate is fixedly embedded with a second support plate, and the bottom of the rubber plate is fixedly embedded with a first support plate.

[0014] As preferred, the bottom of the first support plate is connected with a mounting frame through bolts, and the top of the second support plate is connected to the bottom of the bottom plate through bolts.

[0015] The above technical scheme compared with the prior art has the following technical effects:

[0016] I. By optimizing the refrigerant circulation path and introducing the jet augmenting process, the heating performance of the heat pump air conditioning unit in an ultra-low temperature environment can be significantly improved, the latent heat and sensible heat of the refrigerant can be effectively utilized, and therefore the energy efficiency of the entire heat pump system can be improved, the heating capacity of the air source heat pump water heater is increased, especially in low ambient temperature, the improvement is particularly obvious, so that the heat pump system can operate efficiently in a wider temperature range, and in cold seasons, users can obtain the required hot water or heating effect more quickly.

[0017] II. By using rubber plates as key parts of the buffer assembly, the vibration energy generated during the operation of the compressor can be effectively absorbed and dispersed, thereby reducing the noise and vibration level during equipment operation, avoiding equipment failure or safety hazards caused by excessive vibration, and ensuring the safe use of users. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the embodiment or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0019] Figure 1 It is a first perspective view structural schematic diagram of the utility model;

[0020] Figure 2 It is a front view structural schematic diagram of the utility model;

[0021] Figure 3 is a top view structural schematic diagram of the utility model;

[0022] Figure 4 is a main view cross-sectional structural schematic diagram of the buffer assembly of the utility model;

[0023] Figure 5 is a refrigerant circulation system flow chart of the utility model.

[0024] Mark 1, compressor; 2, buffer assembly; 21, rubber plate; 22, mounting frame; 23, first support plate; 24, second support plate; 3, four-way valve; 4, tank heat exchanger; 41, water outlet pipe; 42, water inlet pipe; 5, plate heat exchanger; 6, filter; 7, first electronic expansion valve; 8, fin heat exchanger; 9, gas-liquid separator; 10, second electronic expansion valve; 11, bottom plate. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0026] It should be understood that the structures, proportions, sizes, etc. shown in the drawings of the specification are only used to cooperate with the content disclosed in the specification for understanding and reading by those skilled in the art, and are not used to limit the limiting conditions of the embodiments of the application, so they do not have substantial technical significance. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effects and purposes that can be achieved by the application, should still fall within the scope of the technical content disclosed by the application.

[0027] EMBODIMENT

[0028] Please refer to Figures 1-5The utility model provides a technical scheme: a low environment temperature air source heat pump hot water machine refrigerant circulation system, including the bottom plate 11 of air source heat pump hot water machine bottom, the bottom plate 11 top is equipped with compressor 1, tank type heat exchanger 4, plate type heat exchanger 5, finned heat exchanger 8, gas-liquid separator 9 respectively, compressor 1 is equipped with exhaust port H, suction port L and enthalpy increase port I, tank type heat exchanger 4 is equipped with refrigerant inlet, refrigerant outlet, water inlet port, water outlet port, high temperature refrigerant exchanges heat with user side water, water temperature rises, plate type heat exchanger 5 main road is equipped with M port and N port, auxiliary road is equipped with P port and Q port, wherein M port and N port intercommunication, P port and Q port intercommunication, in the heating process, MN flow path is high temperature refrigerant, PQ flow path is low temperature refrigerant, finned heat exchanger 8 is outdoor finned internal thread copper pipe type heat exchanger, absorbs the heat in outdoor air when heating, absorbs low temperature heat source, namely air source, and the heat after the work of compressor 1 is condenser heat release heating water, is equipped with finned heat exchanger 8 import and finned heat exchanger 8 export, gas-liquid separator 9 is equipped with import end and export end, after the gas-liquid two-phase refrigerant of evaporator enters gas-liquid separator 9, gas-liquid separation, gaseous refrigerant is inhaled by compressor 1, guarantees that compressor 1 is not liquid strike, such as Figure 5 The arrow direction in the figure is the heating refrigerant flow direction;

[0029] The D end of four-way valve 3 is communicated with the exhaust port H end of compressor 1 through a copper pipe, and the refrigerant outlet end of tank type heat exchanger 4 is respectively communicated with the second electronic expansion valve 10 and the main road M end of plate type heat exchanger 5 through copper pipes; the main road N end of plate type heat exchanger 5 and the import end of finned heat exchanger 8 are communicated with the first electronic expansion valve 7 through a copper pipe, the first electronic expansion valve 7 is used for realizing refrigerant throttling and pressure reduction in the main road heating process, and the import end and the export end of the first electronic expansion valve 7 and the second electronic expansion valve 10 are both communicated with the filter 6 through copper pipes; the material of the copper pipe is red copper, and the filter 6 is made of copper, mainly filtering impurities in the refrigerant pipeline; the second electronic expansion valve 10 is used for realizing refrigerant throttling and pressure reduction in the auxiliary road heating jet gas enthalpy increasing process.

[0030] The auxiliary road Q end of plate type heat exchanger 5 is connected with the enthalpy increase port I end of compressor 1 through a copper pipe, the export end of gas-liquid separator 9 is connected with the suction port L end of compressor 1 through a copper pipe, the refrigerant inlet end of tank type heat exchanger 4 is connected with the C end of four-way valve 3 through a copper pipe, the import end of gas-liquid separator 9 is connected with the S end of four-way valve 3 through a copper pipe, the export end of finned heat exchanger 8 is connected with the E end of four-way valve 3 through a copper pipe, and the side of tank type heat exchanger 4 is respectively provided with a water outlet pipe 41 and a water inlet pipe 42; the connecting copper pipe and the refrigeration accessories in the embodiment are connected by brazing.

[0031] The bottom plate 11 is provided with a buffer assembly 2; in order to reduce the vibration transmission when the compressor 1 works, the buffer assembly 2 is arranged, the buffer assembly 2 comprises two rubber plates 21, the top of the rubber plate 21 is fixedly embedded with a second supporting plate 24, the bottom of the rubber plate 21 is fixedly embedded with a first supporting plate 23, the bottom of the first supporting plate 23 is connected with a mounting frame 22 through bolts, when the compressor 1 in the air source heat pump water heater works, a certain vibration will be generated, at this time, the vibration generated by the compressor 1 is buffered through the buffering of the rubber plate 21, so that the vibration is not too large to affect the surrounding life, and the top of the second supporting plate 24 is connected to the bottom of the bottom plate 11 through bolts.

[0032] Working principle: the low-temperature and low-pressure refrigerant gas is sucked into the compressor 1 through the inlet L of the compressor 1, the high-temperature and high-pressure refrigerant gas after compression is delivered through the copper pipe, and then flows out from the C port of the four-way valve 3 into the tank heat exchanger 4 after the D port of the four-way valve 3, at this time, the ports D and C of the four-way valve 3 are communicated, and the ports E and S are communicated;

[0033] The heat released on the condensing side exchanges heat with the user end water, which can be used for heating, and the high-temperature and high-pressure refrigerant liquid after condensation enters the plate heat exchanger 5, the main road refrigerant is subcooled in the plate heat exchanger 5, and then enters the first electronic expansion valve 7 after passing through the filter 6, and is throttled and decompressed into low-temperature and medium-pressure refrigerant liquid, the low-temperature and low-pressure liquid refrigerant from the first electronic expansion valve 7 passes through the filter 6, and the low-temperature and low-pressure refrigerant liquid enters the fin heat exchanger 8 inlet and evaporates, the low-temperature and low-pressure refrigerant gas after evaporation is discharged from the S port of the four-way valve 3 through the E port of the four-way valve 3, at this time, the ports D and C are communicated, and the ports E and S are communicated, and then flows out from the S port, the refrigerant from the S port of the four-way valve 3 enters the L port of the compressor 1 and is sucked into the compressor 1 for compression, and a heating water cycle is completed;

[0034] At the same time, another auxiliary road refrigerant from the tank heat exchanger 4 passes through the filter 6, is throttled and decompressed into low-temperature and medium-pressure liquid refrigerant through the second electronic expansion valve 10, and then enters the plate heat exchanger 5 through the filter 6, exchanges heat with the main road refrigerant in the plate heat exchanger 5, and evaporates into low-temperature and medium-pressure refrigerant gas, the low-temperature and medium-pressure refrigerant gas after evaporation enters the I port of the compressor 1 and is sucked into the compressor 1 for compression, and the refrigerant circulation process is a jet enhanced enthalpy process, which can increase the heating capacity of the air source heat pump water heater. It has obvious improvement effect on the stable operation of the low-temperature air source heat pump water heater. According to the refrigeration principle and the characteristics of the refrigerant, the jet enhanced enthalpy refrigeration cycle system of heat recovery type can effectively improve the heating capacity in low temperature environment, especially in super low temperature environment, which optimizes the heating performance of the heat pump air conditioning unit, and has obvious improvement effect on the low-temperature air source heat pump water heater system.

[0035] When installing the air source heat pump water heater, the bolts are inserted into the screw holes inside the mounting bracket 22, and the bolts are connected with the support of the air source heat pump water heater. When the compressor 1 inside the air source heat pump water heater works, a certain vibration will be generated. At this time, the vibration generated by the compressor 1 is buffered through the buffering of the rubber plate 21, so as to avoid excessive vibration from affecting the surrounding life.

[0036] In summary, by optimizing the refrigerant circulation path and introducing the jet augmenting process, the heating performance of the heat pump air conditioning unit in the ultra-low temperature environment can be significantly improved, and the latent heat and sensible heat of the refrigerant can be effectively utilized, so as to improve the energy efficiency of the entire heat pump system, increase the heating capacity of the air source heat pump water heater, especially in low ambient temperature, the improvement is particularly obvious, so that the heat pump system can operate efficiently in a wider temperature range, and in cold season, users can obtain the required hot water or heating effect more quickly.

[0037] Through the rubber plate 21 as the key part of the buffering assembly 2, the vibration energy generated when the compressor 1 works can be effectively absorbed and dispersed, so as to reduce the noise and vibration level during equipment operation, avoid equipment failure or safety hazards caused by excessive vibration, and protect the safe use of users.

[0038] Those skilled in the art can understand that the features described in various embodiments and / or claims of the present application can be combined or / and combined, even if such combination or combination is not explicitly described in the present application. In particular, the features described in various embodiments and / or claims of the present application can be combined and / or combined without departing from the spirit and teachings of the present application. All these combinations and / or combinations fall within the scope of the present application.

Claims

1. A refrigerant circulation system for a low ambient temperature air source heat pump water heater, comprising a base plate (11) located at the bottom of the air source heat pump water heater, characterized in that: The top of the base plate (11) is respectively equipped with a compressor (1), a tank heat exchanger (4), a plate heat exchanger (5), a finned heat exchanger (8), and a gas-liquid separator (9). The bottom of the base plate (11) is provided with a buffer assembly (2); The compressor (1) has its exhaust port H end connected to the D end of a four-way valve (3) via a copper pipe, and the refrigerant outlet end of the tank heat exchanger (4) is connected to the main M end of the second electronic expansion valve (10) and the plate heat exchanger (5) via copper pipes respectively. The main N-end of the plate heat exchanger (5) is connected to the inlet end of the finned heat exchanger (8) via a copper pipe, and a first electronic expansion valve (7) is connected to the inlet end of the first electronic expansion valve (7) and the second electronic expansion valve (10) via a copper pipe, and a filter (6) is connected to both the inlet end and the outlet end of the second electronic expansion valve (10).

2. The refrigerant circulation system for a low ambient temperature air source heat pump water heater according to claim 1, characterized in that: The enthalpy-increasing port I of the compressor (1) is connected to the auxiliary circuit Q of the plate heat exchanger (5) through a copper pipe, and the suction port L of the compressor (1) is connected to the outlet of the gas-liquid separator (9) through a copper pipe.

3. The refrigerant circulation system for a low ambient temperature air source heat pump water heater according to claim 1, characterized in that: The C end of the four-way valve (3) is connected to the refrigerant inlet of the tank heat exchanger (4) through a copper pipe, and the S end of the four-way valve (3) is connected to the inlet of the gas-liquid separator (9) through a copper pipe.

4. The refrigerant circulation system for a low ambient temperature air source heat pump water heater according to claim 1, characterized in that: The E end of the four-way valve (3) is connected to the outlet end of the finned heat exchanger (8) via a copper pipe.

5. The refrigerant circulation system for a low ambient temperature air source heat pump water heater according to claim 1, characterized in that: The tank heat exchanger (4) is provided with an outlet pipe (41) and an inlet pipe (42) on one side.

6. The refrigerant circulation system for a low ambient temperature air source heat pump water heater according to claim 1, characterized in that: The buffer assembly (2) includes two rubber plates (21), with a second support plate (24) fixedly embedded at the top of the rubber plate (21) and a first support plate (23) fixedly embedded at the bottom of the rubber plate (21).

7. The refrigerant circulation system for a low ambient temperature air source heat pump water heater according to claim 6, characterized in that: The bottom of the first support plate (23) is connected to the mounting bracket (22) by bolts, and the top of the second support plate (24) is connected to the bottom of the base plate (11) by bolts.

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