Two-capillary-tube self-guiding throttling four-circulation cold and hot water machine

Abstract

The utility model relates to a two-capillary self-guiding throttling four-circulation cold and warm water heater, which is characterized in that a hot water heat exchanger, a first capillary throttler and a second capillary throttler are additionally arranged in a fluorine circulation loop of a traditional cold and warm air conditioner; an air inlet and a liquid outlet of the hot water heat exchanger are respectively connected with a second air outlet of the compressor and first interfaces of the first capillary throttler and the second capillary throttler; second interfaces of the first throttler and the second throttler are connected with second interfaces of the outdoor heat exchanger and the inner heat exchanger; a first connector, a second connector, a third connector and a fourth connector of the four-way valve are connected with a first air outlet of the compressor, first connectors of the indoor heat exchanger and the outdoor heat exchanger and an inlet of the gas-liquid separator respectively, and the gas-liquid separator is connected with an inlet of the compressor. The fluorine circulation loop not only retains traditional refrigeration and heat circulation, but also adds double-heating water circulation with a hot water heat exchanger as a condenser. Three operation modes of heating water in spring and autumn, refrigerating and free heating water in summer and heating and heating water in winter are executed; the efficient energy-saving refrigerating, heating and hot water three-purpose machine is simple and convenient in structure control, stable in operation and efficient and energy-saving.

Description

Technical Field

[0001] The utility model relates to the technical field of air-conditioning heat pump heating and hot water systems. Background Art

[0002] With the improvement of people's living standards, while meeting the needs of indoor heating, air conditioning and hot water provision, energy conservation and low-carbon environmental protection are also required. The current household air conditioners produce cooling capacity for the indoor space in summer while emitting a large amount of heat energy to the outdoors. If it can be collected for making hot water, the hot water obtained will not cost money. In areas with indoor centralized heating in spring, autumn and winter, air conditioners are idle for a long time, and unused equipment is more likely to be damaged. In addition to solar water heaters, heat pump water heaters are also available for cheap domestic hot water. Solar water heaters are affected by the weather, and it is difficult to provide hot water on rainy days, and they are also not easy to use for residents in high-rise buildings. Heat pump water heaters are composed of compressors, air heat exchangers (evaporators), hot water heat exchangers (condensers), and throttles. They absorb the heat energy of outdoor air, consume the electricity used to compress the refrigerant and increase the pressure, and produce hot water, which is more energy-efficient than electric water heaters. 70% or more; however, the heat pump water heater has a single function; and the traditional air conditioner has only two functions of cooling and heating in winter, and cannot make hot water; therefore, the existing large-scale traditional air conditioners can be transformed into a machine that can use the waste heat discharged by the air conditioner to make domestic hot water in summer, and can use the heat energy absorbed from the outdoor air to make hot water in spring and autumn and in areas with centralized heating, which not only saves energy but also fully improves the utilization rate of the equipment, and is of great significance; for this purpose, many patents for the three-in-one machine for heating, cooling, air conditioning and hot water have been proposed, and even I have studied for more than 20 years, and have applied for and obtained many authorized patents, but there are still some shortcomings, either the system structure is complicated or the newly added three-way valve accessories need to be developed and manufactured separately, which have not been adopted by manufacturers. The single throttling front water heat exchanger for heating, cooling and hot water three-in-one machine (patent number ZL 2016100930781), a four-mode hot and cold water machine with a front water heat exchanger (application number: 2016100930777), uses a high-pressure gas-liquid separator to avoid the problem of insufficient refrigerant in the fluorine circuit caused by the refrigerant condensate generated when the hot water heat exchanger makes hot water passing through the outdoor heat exchanger or the indoor heat exchanger, thereby saving a three-way valve. However, four one-way valves are still needed to assist in controlling the throttle, and the structure is still complicated; therefore, it has not been promoted and needs to be improved. Summary of the invention

[0003] In order to overcome the shortcomings of the existing heat pump water heaters with single functions, the air conditioners with only cooling and heating functions, and the inability to use the heat discharged to the environment during cooling in summer to make hot water, as well as the complex refrigerant circuits, high failure rates and unstable operations of many air conditioning water heater patents, the utility model proposes a two-capillary self-throttling four-circulation cold and warm water heater, which is a four-circulation cold and warm water heater with two throttling capillaries self-divided by a single four-way valve. Only by switching a four-way valve, four fluorine circuit cycles can be organized, and three operating modes can be used to complete the three functions of hot water making, cooling and heating; in summer, hot water can be obtained for free while cooling, and the cooling efficiency can be improved; in spring and autumn, hot water making saves more than 75% of electricity than electric water heaters; in winter, the COP of heat pump heating can also be around 3.0, with obvious energy-saving effects. It is a good product for improving quality, energy saving and low carbon that the people just need, and has broad market prospects.

[0004] The utility model discloses a two-capillary self-guided throttling four-circulation cold and hot water machine, comprising: a compressor, a four-way valve, an indoor heat exchanger, an outdoor heat exchanger, a two-way throttle, and a gas-liquid separator (liquid storage device); the first, second, third, and fourth interfaces of the four-way valve are respectively connected to the first air outlet of the compressor, the outdoor heat exchanger, the first interface of the indoor heat exchanger, and the air inlet of the gas-liquid separator; the second interfaces of the indoor heat exchanger and the outdoor heat exchanger are mutually connected by a two-way throttle; the outlet of the gas-liquid separator is connected to the inlet of the compressor; the indoor heat exchanger is an air heat exchanger equipped with an indoor fan, or a water heat exchanger equipped with a circulating water pump; the outdoor heat exchanger is an air source heat exchanger equipped with an outdoor fan and an outdoor temperature detector; the characteristics are: The two-capillary self-throttling four-cycle cold and hot water machine is additionally provided with: a hot water heat exchanger and a first and a second capillary throttle; the air inlet and the liquid outlet of the hot water heat exchanger are respectively connected to the second air outlet newly added by the compressor and the first interfaces of the first and the second capillary throttles; the second interfaces of the first and the second capillary throttles are respectively connected to the second interfaces (liquid inlets) of the outdoor heat exchanger and the indoor heat exchanger; the connected fluorine circuit is filled with refrigerant; the fluorine circuit can organize four first, second, third and fourth cycles to execute three operating modes of hot water production, cooling and hot water production, and heating and hot water production; the hot water heat exchanger is a hot water tank integrated hot water heat exchanger with a heat exchanger heat pipe in the hot water tank, or an independent plate heat exchanger, or an independent shell and tube heat exchanger.

[0005] The utility model discloses a two-capillary self-conducting throttling four-cycle cold and warm water heater, which is characterized in that: the four fluorine path processes of the first, second, third and fourth cycles of the two-capillary self-conducting throttling four-cycle cold and warm water heater are as follows:

[0006] The first cycle is a fluorine circuit cycle with the hot water heat exchanger as the condenser and the outdoor heat exchanger as the evaporator, which is a cycle for making hot water in spring, autumn and winter; the process is: compressor, hot water heat exchanger (making hot water), first capillary throttle, outdoor heat exchanger (heat absorption), four-way valve heating position (②④) passage, gas-liquid separator, compressor;

[0007] The second cycle is a fluorine circuit cycle with the hot water heat exchanger as the condenser and the indoor heat exchanger as the evaporator. It is a hot water cycle generated during the refrigeration cycle in summer. The process is: compressor, hot water heat exchanger (hot water), second capillary throttle, indoor heat exchanger (heat absorption), four-way valve refrigeration position (③④) passage, gas-liquid separator, compressor;

[0008] The third cycle is the fluorine circuit cycle with the outdoor heat exchanger as the condenser and the indoor heat exchanger as the evaporator, which is the circulation of refrigerant gas or refrigerated water in summer; the process is: compressor, four-way valve refrigeration position (①②) passage, outdoor heat exchanger (heat release), the first capillary tube of the two-way throttle, bypass check valve, indoor heat exchanger (heat absorption), four-way valve (③④) passage, gas-liquid separator, compressor;

[0009] The fourth cycle is the fluorine circuit cycle with the indoor heat exchanger as the condenser and the outdoor heat exchanger as the evaporator. It is the cycle for heating or hot water in winter. The process is: compressor, four-way valve (heating position, ①③ passages), indoor heat exchanger (heat release), the second and first two capillary tubes of the two-way throttle, outdoor heat exchanger (heat absorption), four-way valve heating position (②④) passages, gas-liquid separator, compressor.

[0010] The two-capillary self-guided throttling four-circulation cold and warm water machine described in the utility model is characterized in that the three functions of hot water making, cooling and heating are realized by the first, second and third operating modes or the automatic mode, and the control of the three operating modes and the automatic mode are respectively:

[0011] The first operation mode is the hot water heating mode in spring and autumn. The fluorine circuit executes the first cycle, the four-way valve is in the heating position (①③, ②④ are connected), the compressor and the outdoor fan are running, and the indoor fan or the circulating water pump of the water source heat exchanger is stopped; when the hot water heat exchanger is a hot water tank integrated hot water heat exchanger, the hot water heat exchanger is natural convection heat exchange; when the hot water heat exchanger is a plate heat exchanger or a shell and tube heat exchanger, the hot water circulation pump is operated for circulation heat exchange; when the hot water temperature T1 is lower than the set water temperature lower limit T1a, it starts; when it reaches the set water temperature upper limit T1b, it stops;

[0012] The second operation mode is the summer cooling and automatic hot water mode. The fluorine circuit mainly executes the third cycle and has its own second cycle. The four-way valve is in the cooling position (①②, ③④) and is connected. The compressor, indoor fan or circulating water pump, and outdoor fan are all running. When the hot water heat exchanger and the hot water tank are split, the hot water circulating pump is running. It starts when the room temperature T3 is higher than the set room temperature T3a and stops when it is lower than the set room temperature T3a. Summer use mode.

[0013] The third operation mode is the winter heating or heating hot water and automatic hot water mode. The fluorine circuit mainly executes the fourth cycle and has the first cycle. The four-way valve is in the heating position (①③, ②④) and is connected. The compressor, indoor fan or water circulation pump, and outdoor fan are all running. When the water heat exchanger and the hot water tank are split, the hot water circulation pump is running. It starts when the room temperature T3 is lower than the set room temperature T3a, and stops when it reaches the set room temperature T3a. This mode is used when heating is needed in winter.

[0014] In the automatic operation mode, the principle of giving priority to hot water making is implemented, and the first operation mode is preferred, that is, the start and stop of the compressor and the fan of the first operation mode of hot water making are automatically determined based on the comparison between the hot water temperature T1 and the upper and lower limits T1a and T1b of the set hot water temperature; when the hot water temperature T1 reaches the set upper limit T1b of the hot water temperature, the second or third operation mode is automatically selected based on the positive or negative difference between the room temperature T3 and the set room temperature T3a; if neither the second or third operation mode is met, the first operation mode is stopped; the above four operation modes all have the function of making hot water.

[0015] The two-capillary self-conducting throttling four-circulation cold and warm water machine described in the utility model is characterized in that: when the hot water heat exchanger is a hot water heat exchanger integrated with a hot water tank, it is a three-body structure: an outdoor body, an indoor body and an integrated hot water heat exchanger; the outdoor body is equipped with: a compressor, a four-way valve, an outdoor heat exchanger, an outdoor fan, a two-way throttle, a first and a second capillary throttle, and a gas-liquid separator; the indoor body is equipped with: an indoor heat exchanger, an indoor fan, and a control panel; the fluorine path between the three bodies, that is, the fluorine path between the outdoor heat exchanger and the indoor heat exchanger and the hot water heat exchanger, needs to be connected through two groups of four detachable connecting pipes.

[0016] The two-capillary self-guided throttling four-circulation cold and warm water machine described in the utility model is characterized in that its hot water heat exchanger is a plate heat exchanger or a sleeve heat exchanger, and when it is installed in an outdoor machine body, its fluorine circulation loop is a two-body structure; the hot water heat exchanger installed in the outdoor machine body is connected to the second outlet of the compressor and the first interface of the first and second capillary throttling devices, all by welding; the water circuit of the hot water heat exchanger is interconnected with the hot water tank through the hot water circulation loop, and the hot water circulation loop is equipped with a hot water circulation pump.

[0017] The two-capillary self-throttling four-circulation cold and warm water machine described in the utility model is characterized in that when the indoor heat exchanger is a water heat exchanger for air conditioning and heating, the water heat exchanger is moved and installed on the top of the outdoor machine body, and the fluorine circuits formed are concentrated in the outdoor machine body, which is called an integrated two-capillary self-throttling four-circulation cold and warm water machine; the indoor air conditioning and heating functions of the integrated two-capillary self-throttling four-circulation cold and warm water machine are completed by the air conditioning water circulation circuit and the circulating water pump connected to the water heat exchanger and the indoor fan coil heat exchanger; during the refrigeration cycle, the water heat exchanger produces chilled water, the circulating water pump operates, and the chilled water passes through the coil fan to blow cold air into the room; during the heating cycle, the water heat exchanger produces hot water for heating, the circulating water pump operates, and the hot water for heating passes through the coil fan to blow warm air into the room.

[0018] The innovative features of this utility model mainly include:

[0019] 1. The two-capillary self-throttling four-cycle cold and warm water machine described in the utility model has the following innovative features: a second interface is separated at the compressor outlet to connect the air inlet of the added hot water heat exchanger, and the liquid outlet at the bottom of the hot water heat exchanger is connected to the second interface (liquid inlet) of the outdoor and indoor heat exchangers respectively through the first and second capillary throttles. Therefore, by using the original cold and warm air conditioner circuit and the same compressor, two new hot water heat pump cycles of the hot water heat exchanger (which is a condenser) and the indoor and outdoor heat exchangers (which are evaporators) are newly constructed; this invention produces three unexpected effects: (1) Regardless of whether the air conditioner water machine performs a cooling or heating cycle, the two-capillary self-throttling four-cycle cold and warm water machine of the utility model can produce hot water without the need to add an additional control valve; (2) The condensate of the hot water heat exchanger passes through the two-way capillary throttles and is automatically condensed by the pressure difference between the compressor outlet and the indoor or outdoor heat exchanger when used as an evaporator. The throttling passage is dynamically selected to form a dual-source hot water heating cycle of the indoor or outdoor heat exchanger and the hot water heat exchanger; during the independent hot water heating cycle, although the compressor exhaust will flow through the four-way valve to the indoor or outdoor heat exchanger whose fan is stopped and not working, due to the lack of circulation and the fan is also stopped, the high-pressure refrigerant gas is blocked by the capillary throttle, so only the hot water heat exchanger and the indoor and outdoor heat exchangers used as evaporators can perform the hot water heating cycle; (3) The compressor outlet and the first interface of the four-way valve are kept connected, thus maintaining the cooling and heating functions of the original air conditioner; this is a magical invention. The theoretical basis of the invention is based on a deep understanding of the refrigeration principle and the thermal properties of the refrigerant, and it is found that the throttle is a passage for liquids and a blocker for gases; the above three innovations make the air conditioner water heater with four cycles of cooling, heating and dual-source hot water heating extremely simple and novel, and it is an original utility model.

[0020] 2. The two-capillary self-guided throttling four-circulation hot and cold water heater described in the utility model can achieve the three functions of hot water making, cooling and heating only by switching a four-way valve and coordinating the start and stop of the indoor heat exchanger fan; the system has a simple structure, convenient control and reliable operation.

[0021] 3. The two-capillary self-throttling four-cycle cold and warm water machine described in the utility model adopts the first operation mode in spring and autumn, absorbing heat from the outdoor to make hot water, which saves 70-75% of electricity compared with electric water heaters; in summer, the second refrigeration mode is implemented to simultaneously make hot water, and the obtained hot water is completely free; because the refrigeration gas can also produce enough hot water in summer, there is no need to set up a second separate refrigeration and hot water operation mode, which simplifies the control; in areas with heating in winter, the two-capillary self-throttling four-cycle cold and warm water machine can execute the first operation mode to make hot water cheaply; the hot water stored in the hot water tank can provide heat for the system defrosting cycle; it can be seen that the two-capillary self-throttling four-cycle cold and warm water machine described in the utility model has obvious energy-saving effect.

[0022] 4. The two-capillary self-guided throttling four-circulation cold and warm water heater described in the utility model has a simple refrigerant circulation circuit for the whole machine and is easy to manufacture; there are three combinations, which are easy to transport and install, especially the one-piece fluorine path connections are all welded, which will never leak fluorine and is easy to install; the three operating modes are only required through the replacement of a four-way valve, which is only a few times a year, and in normal operation, it is only necessary to control the start and stop of the compressor and coordinate the start and stop of the indoor and outdoor fans to achieve the optimal energy-saving operation mode, which is easy to use.

[0023] In summary, the two-capillary self-guided throttling four-circulation hot and cold water machine described in the utility model has clear novelty and obvious practicality, and meets the requirements of utility model patents. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a two-capillary self-throttling four-circulation cold and warm water machine described in the utility model, a basic structural diagram of embodiment 1 and a first separate hot water production cycle process, that is, an illustration of the first operating mode.

[0025] Figure 2 This is a diagram illustrating the second separate hot water production cycle process of Example 1 of the two-capillary self-throttling four-circulation cold and warm water machine described in the utility model.

[0026] Figure 3 This is the two capillary self-throttling four-cycle cold and warm water machine described in the utility model, the third refrigerant with hot water circulation process and the second operation mode illustration of Example 1.

[0027] Figure 4It is a two-capillary self-throttling four-circulation cold and warm water machine described in the utility model. The fourth heating system of Example 1 is accompanied by a hot water circulation process and a third operating mode illustration diagram.

[0028] Figure 5 It is the two capillary self-conducting throttling four-circulation hot and cold water machine described in the utility model, the basic structure of Example 2, the hot water heat exchanger is a shell and tube hot water heat exchanger connected to the hot water tank with a hot water circulation pipeline, the first operating mode, that is, the first independent hot water circulation process illustration diagram.

[0029] Figure 6 It is the two capillary self-throttling four-circulation cold and warm water machine described in the utility model, the basic structure of Example 3, the hot water heat exchanger is a plate heat exchanger, and the first operating mode.

[0030] Figure 7 It is the two capillary self-guided throttling four-cycle cold and warm water machine described in the utility model, the basic structure of Example 4, the hot water heat exchanger is a plate heat exchanger, the indoor heat exchanger is a water source plate heat exchanger for air-conditioning water, the second operating mode, the fluorine circuit main third cycle, automatic with second cycle, functional refrigeration gas with hot water cycle.

[0031] The present invention will be further described below in conjunction with the embodiments and the accompanying drawings, but the present invention is not limited thereto. DETAILED DESCRIPTION

[0032] The basic structure and working principle of the two-capillary self-guided throttling four-circulation cold and warm water heater described in the utility model are as follows: Figure 1 , 2 , 3, and 4 are shown in Example 1; Figure 1 As shown, the two-capillary self-conducting throttling four-cycle cold and warm water machine of the utility model comprises: a compressor 1, an integrated hot water heat exchanger 2 (including a hot water tank 3) added by the utility model, a four-way valve 4, an outdoor heat exchanger 5, a two-way throttle (6a, 6b, D), the first and second capillary throttles J1 and J2 added by the utility model, an indoor heat exchanger 7, and a gas-liquid separator 8, which are connected by pipelines to form a refrigerant circulation pipeline, and the pipeline is filled with refrigerant; the hot water heat exchanger 2 is an integrated hot water heat exchanger in which the spiral tube heat exchanger 2 is placed in the hot water tank 3, and a hot water temperature detector T1 is installed on the upper part of the hot water tank; the outdoor heat exchanger is provided with an outdoor fan 5a and an outdoor unit coil temperature detector T2; the indoor heat exchanger is provided with an indoor fan 7a and an indoor temperature detector T3; the second and third interfaces of the four-way valve, ( Figure 1 ② and ③) are connected to the first interfaces of the outdoor and indoor heat exchangers 5 and 7 respectively ( Figure 1 Middle right interface); the second interface of indoor and outdoor heat exchanger ( Figure 1The four-way valve has a fourth port (the outlet port, Figure 1 ④) is connected to the inlet of the gas-liquid separator 8; the outlet of the gas-liquid separator 8 is connected to the inlet of the compressor 1; it is characterized in that: the outlet of the compressor 1 is divided into two paths, the first path interface is connected to the first interface (air inlet ①) of the four-way valve 4, and the second path interface is connected to the air inlet of the hot water heat exchanger 2; the liquid outlet at the bottom of the hot water heat exchanger is connected in parallel with the first interface of the first and second capillary throttles J1 and J2; the second interface of the first and second capillary throttles is connected to the second interface (liquid inlet interface) of the outdoor and indoor air heat exchangers 5 and 7 respectively; the structure and connection method of this part are the core features of the utility model. The refrigerant circulation circuit of the two capillary self-guided throttling four-cycle cold and warm water machine formed by the connection is filled with refrigerant.

[0033] The two-capillary self-guided throttling four-cycle cold and hot water machine described in the utility model is characterized in that it has four first, second, third and fourth cycles, and the refrigerant flow sequence of the four cycles is:

[0034] First cycle (see Figure 1 ), is a fluorine circuit cycle with the hot water heat exchanger as the condenser and the outdoor heat exchanger as the evaporator, used for hot water production in spring, autumn and winter; its fluorine process is: compression 1, hot water heat exchanger 2 (hot water production), the first capillary throttle J1, outdoor heat exchanger 5 (heat absorption), four-way valve 4 (②④), gas-liquid separator 8, compressor 1;

[0035] The second cycle (see Figure 2 ), is a fluorine circuit cycle with the hot water heat exchanger as the condenser and the indoor heat exchanger as the evaporator, and is a hot water cycle with a refrigeration cycle in summer; its fluorine process is: compressor 1, hot water heat exchanger 2 (hot water production), second capillary throttle J2, indoor heat exchanger 7 (heat absorption), four-way valve 4 (③④), gas-liquid separator, compressor;

[0036] The third cycle (see Figure 3 ), is a fluorine circuit cycle with the outdoor heat exchanger as the condenser and the indoor heat exchanger as the evaporator. In summer, it absorbs indoor heat to circulate refrigeration gas or cold water. Its fluorine process is: compressor 1, four-way valve 4 (①②), outdoor heat exchanger 5 (heat release), 6a section capillary of the two-way throttle (mild throttling), bypass check valve D, indoor heat exchanger 7 (heat absorption and cold air delivery), four-way valve 4 (③④), gas-liquid separator 8, compressor 1; when the refrigeration gas circulates, there is also an automatic second cycle, that is, the hot water heat exchanger also participates in the heating water cycle, and the condensate produced will automatically enter the indoor heat exchanger through the second capillary throttle J2 and throttling to evaporate and participate in refrigeration;

[0037] The fourth cycle (see Figure 4 ), is a fluorine circuit cycle with the indoor heat exchanger as the condenser and the outdoor heat exchanger as the evaporator, which is a cycle for heating or hot water in winter. Its fluorine process is: compressor 1, four-way valve 4 (①③), indoor heat exchange 7 (heat release and heating), the second and first capillaries of the two-way throttle (6b, 6a), outdoor heat exchanger 5 (heat absorption), four-way valve 4 (②④), gas-liquid separator, compressor; when the heating cycle is in progress, the first cycle is also generated, that is, the hot water heat exchanger also participates in the heating water cycle, and the condensate produced will automatically enter the outdoor heat exchanger through the first capillary throttle J1 and throttling to evaporate, thereby increasing the outdoor heat absorption.

[0038] The two-capillary self-guided throttling four-circulation cold and hot water machine described in the utility model is characterized in that the control of the first, second, third and fully automatic four operating modes are respectively:

[0039] First operating mode, see Figure 1 , the function is to make hot water in spring and autumn, the fluorine circuit executes the first hot water cycle, the four-way valve is in the heating position (①③, ②④ are connected), the compressor and the outdoor fan 5a are running, and the indoor fan 7a is stopped; it starts when the hot water temperature T1 is lower than the set water temperature lower limit T1a; it stops when it reaches the set water temperature upper limit T1b; it is a common mode in spring and autumn;

[0040] Second operating mode, see Figure 3 , the function is summer cooling mode and automatic hot water making mode, the fluorine circuit executes the second and third cycles, the four-way valve is in the cooling position (①②, ③④ are connected), the compressor, indoor fan 7a, and outdoor fan 5a are all running; when the room temperature T3 is higher than the set room temperature T3a, it starts, and when it is lower than the set room temperature T3a, it stops; summer use mode; since the second operation mode can also produce hot water, the second independent hot water making cycle operation mode is no longer set;

[0041] The third operation mode is for heating or hot water heating and automatic hot water heating in winter. The four-way valve is in the heating position (①③, ②④ are connected), the compressor, indoor fan 7a, and outdoor fan 5a are all running; it starts when the room temperature T3 is lower than the set room temperature T3a, and stops when it reaches the set room temperature T3a; this mode is used when heating is needed in winter; see Figure 4 ;

[0042] In the automatic operation mode, the principle of hot water making priority is implemented, that is, the first operation mode is implemented first, and the start and stop of the compressor and fan for hot water making in the first operation mode are automatically determined based on the comparison between the hot water temperature T1 and the upper and lower limits T1a and T1b of the set hot water temperature; when the hot water temperature T1 reaches the set hot water temperature upper limit T1b, the second operation cooling mode or the third operation heating mode is automatically selected to be implemented based on the positive or negative difference between the room temperature T3 and the set room temperature T3a; if neither the second or third operation mode is met, the first operation mode is stopped; the above four operation modes all have the function of hot water making.

[0043] The two-capillary self-throttling four-circulation cold and hot water machine of Example 1 is a three-body type: an outdoor body, an indoor body and an integrated hot water heat exchanger; Figure 1-4 As shown in the dotted frame A, the outdoor unit body is equipped with: a compressor 1, a four-way valve 4, an outdoor heat exchanger 5, an outdoor fan 5a, a two-way throttle (6a, 6b, D), a first and a second throttling capillary J1, J2, and a gas-liquid separator 8; Figure 1-4 As shown in the dotted frame B, the indoor unit is installed with: indoor heat exchanger 7, indoor fan 7a, and control panel (not shown in the figure); the integrated hot water heat exchanger includes a hot water heat exchanger 2 and a hot water tank 3 with spiral heat exchange tubes placed in the hot water tank; the refrigerant pipeline of the outdoor unit has two groups of four external interface connection ends: the first connection end is a parallel interface end of the two-way throttle and the second capillary tube, which is connected to the second interface (liquid inlet) of the indoor heat exchanger; the second connection end is a third interface end (③) of the four-way valve, which is connected to the first interface of the indoor heat exchanger; the third connection end is the second outlet interface of the compressor, which is connected to the air inlet of the hot water heat exchanger; the fourth connection end is a parallel inlet interface end of the first and second throttling capillary tubes J1 and J2, which is connected to the liquid outlet of the hot water heat exchanger; the four external interface connection ends are all equipped with pipeline connection stop valves, which can pre-fill the refrigerant in the refrigerant pipeline of the outdoor unit and connect to the corresponding interface with a movable and detachable connecting pipe at the user site.

[0044] The two-capillary self-throttling four-circulation cold and hot water machine described in Example 2 is composed of Figure 5 It is explained that the difference between Example 2 and Example 1 is that the hot water heat exchanger is replaced by a shell-and-tube heat exchanger 2, which is connected to the hot water tank 3 through a circulating water pipe, and a hot water circulating pump 10 is installed in the hot water circulation loop; the shell-and-tube heat exchanger is placed at the bottom or top of the outdoor body, and the inlet of its refrigerant passage is welded and connected to the inlet of the first and second capillary tubes, and the outlets of the first and second capillary tubes are respectively welded and connected to the second interfaces of the outdoor and indoor heat exchangers; Figure 5 The first operating mode is shown, in spring and autumn, hot water circulation is performed, outdoor heat is absorbed, and the indoor fan is stopped.

[0045] The two-capillary self-conducting throttling four-circulation cold and warm water heater of embodiment 3 is composed of Figure 6 Description, its characteristic is that the hot water heat exchanger is replaced by a plate heat exchanger 2, which is connected to the hot water tank through a circulating water pipe, and a hot water circulation pump 10 is installed in the hot water circulation loop; the plate heat exchanger is placed on the top of the outdoor body, and the air inlet of its refrigerant passage is welded and connected to the second outlet interface of the compressor, and the liquid inlet of its refrigerant passage is welded and connected to the inlet of the first and second capillaries; the outlets of the first and second capillaries are respectively welded and connected to the second interfaces of the outdoor and indoor heat exchangers.

[0046] The two-capillary self-conducting throttling four-circulation cold and warm water heater of embodiment 4 is composed of Figure 7 The indoor heat exchanger is replaced by a water heat exchanger 7 for air conditioning and heating, which is a plate heat exchanger equipped with a circulating water pump 7a; the second operation mode is executed, that is, the third cycle of the fluorine circuit is accompanied by the second cycle, and the operation route of the refrigerant is the same as that of Example 1. Figure 3 The fluorine circuit of Example 4 is the same as that of Example 3. The difference between the fluorine circuit of Example 4 and that of Example 3 is that the indoor heat exchanger is an air-conditioning water heat exchanger of a plate heat exchanger, which is installed in the outdoor unit body. The first interface of the air-conditioning water heat exchanger is welded and interconnected with the third interface of the four-way valve, and the second interface is welded and interconnected with the second port of the second capillary throttle and the outlet end of the one-way valve of the two-way throttle; the fluorine circuit constitutes an integrated two-capillary self-conducting throttling four-circulation cold and warm water heater; the integrated two-capillary self-conducting throttling four-circulation cold and warm water heater, during the refrigeration cycle, the air-conditioning water heat exchanger produces chilled water for air conditioning, which is sent into the fan coil heat exchanger 11 through a circulating water pump, completes heat exchange with the indoor air, and blows cold air into the room; during the heating cycle, the air-conditioning water heat exchanger produces heating hot water, and the heating hot water passes through the fan coil to blow hot air into the room; this is the normal cycle of central air conditioning to produce air-conditioning chilled water, and hot water is also produced.

Claims

1. Two capillary self-guided throttling four-circulation cold and hot water machine is a four-circulation cold and hot water machine with two throttling capillary diversion controlled by a single four-way valve, including: A compressor, a four-way valve, an indoor heat exchanger, an outdoor heat exchanger, a two-way throttle, and a gas-liquid separator; the first, second, third, and fourth interfaces of the four-way valve are respectively connected to the first air outlet of the compressor, the outdoor heat exchanger, the first interface of the indoor heat exchanger, and the air inlet of the gas-liquid separator; the second interfaces of the indoor heat exchanger and the outdoor heat exchanger are interconnected by a two-way throttle; the outlet of the gas-liquid separator is connected to the inlet of the compressor; the indoor heat exchanger is an air heat exchanger equipped with an indoor fan, or a water heat exchanger with a circulating water pump; the outdoor heat exchanger is an air source heat exchanger with an outdoor fan and an outdoor temperature detector; its characteristics are: the two capillary self-guided throttling four-cycle cooling and heating The water heater is additionally provided with: a hot water heat exchanger and a first and a second capillary throttle; the air inlet and the liquid outlet of the hot water heat exchanger are respectively connected to the second air outlet newly added by the compressor and the first interfaces of the first and the second capillary throttles; the second interfaces of the first and the second capillary throttles are respectively connected to the second interfaces of the outdoor heat exchanger and the indoor air heat exchanger; the connected fluorine circuit is filled with refrigerant; the fluorine circuit can organize four first, second, third and fourth cycles to execute three operating modes of hot water production, cooling and hot water production, and heating and hot water production; the hot water heat exchanger is a hot water tank integrated hot water heat exchanger with a heat exchanger pipe in the hot water tank, or an independent plate heat exchanger, or an independent shell and tube heat exchanger.

2. The two-capillary self-conducting throttling four-circulation cold and hot water machine according to claim 1 is characterized in that: The four fluorine-circuit processes of the first, second, third and fourth cycles of the two-capillary self-throttling four-cycle cold and hot water machine are as follows: The first cycle is a fluorine circuit cycle with the hot water heat exchanger as the condenser and the outdoor heat exchanger as the evaporator, which is a cycle for hot water production in spring, autumn and winter; the process is: compressor, hot water heat exchanger, first capillary throttle, outdoor heat exchanger, four-way valve in the heating position, gas-liquid separator, compressor; The second cycle is a fluorine circuit cycle with the hot water heat exchanger as the condenser and the indoor heat exchanger as the evaporator. It is a hot water cycle generated during the refrigeration cycle in summer. The process is: compressor, hot water heat exchanger, second capillary throttle, indoor heat exchanger, four-way valve at the refrigeration position, gas-liquid separator, compressor; The third cycle is the fluorine circuit cycle with the outdoor heat exchanger as the condenser and the indoor heat exchanger as the evaporator, which is the circulation of refrigerant gas or refrigerant water in summer; the process is: compressor, four-way valve in the cooling position, outdoor heat exchanger, the first capillary tube of the two-way throttle, bypass check valve, indoor heat exchanger, four-way valve in the cooling position, gas-liquid separator, compressor; The fourth cycle is the fluorine circuit cycle with the indoor heat exchanger as the condenser and the outdoor heat exchanger as the evaporator. It is the cycle for heating or hot water in winter. Its fluorine process is: compressor, four-way valve in the heating position, indoor heat exchanger, the second and first two capillary tubes of the two-way throttle, outdoor heat exchanger, four-way valve in the heating position, gas-liquid separator, compressor.

3. The two-capillary self-throttling four-circulation cold and hot water machine according to claim 1 is characterized in that: The three functions of hot water production, cooling and heating are realized by the first, second and third operation modes or the automatic mode. The control of the three operation modes and the automatic mode are: The first operation mode is the hot water heating mode in spring and autumn. The fluorine circuit executes the first cycle, the four-way valve is in the heating position, the compressor and the outdoor fan are running, and the indoor fan or the circulating water pump of the water source heat exchanger is stopped; when the hot water heat exchanger is a plate heat exchanger or a shell and tube heat exchanger, the hot water circulation pump is operated to circulate heat; it starts when the hot water temperature T1 is lower than the set water temperature lower limit T1a; it stops when it reaches the set water temperature upper limit T1b; The second operation mode is the summer cooling and automatic hot water mode. The fluorine circuit mainly executes the third cycle and has its own second cycle. The four-way valve is in the cooling position, and the compressor, indoor fan or circulating water pump, and outdoor fan are all running. When the hot water heat exchanger and the hot water tank are split, the hot water circulating pump is running. It starts when the room temperature T3 is higher than the set room temperature T3a, and stops when it is lower than the set room temperature T3a. Summer use mode; The third operation mode is the winter heating or heating hot water and automatic hot water mode. The fluorine circuit mainly executes the fourth cycle and has the first cycle. The four-way valve is in the heating position, and the compressor, indoor fan or water circulation pump, and outdoor fan are all running. When the water heat exchanger and the hot water tank are split, the hot water circulation pump runs. It starts when the room temperature T3 is lower than the set room temperature T3a, and stops when it is higher than the set room temperature T3a. This mode is used when heating is needed in winter. In the automatic operation mode, the principle of hot water making is implemented, and the first operation mode is preferred, that is, the start and stop of the compressor and the fan of the first operation mode of hot water making are automatically determined based on the comparison between the hot water temperature T1 and the upper and lower limits T1a and T1b of the set hot water temperature; when the hot water temperature T1 reaches the set upper limit T1b of the hot water temperature, the second or third operation mode is automatically selected based on the positive or negative difference between the room temperature T3 and the set room temperature T3a; if neither the second or third operation mode is met, the first operation mode is stopped; The above four operation modes all have the function of making hot water.

4. The two-capillary self-throttling four-circulation cold and hot water machine according to claim 1 is characterized in that: When the hot water heat exchanger is a hot water heat exchanger integrated with a hot water tank, it has a three-body structure: an outdoor body, an indoor body and an integrated hot water heat exchanger; the outdoor body is equipped with: a compressor, a four-way valve, an outdoor heat exchanger, an outdoor fan, a two-way throttle, a first and a second capillary throttle, and a gas-liquid separator; the indoor body is equipped with: an indoor heat exchanger, an indoor fan, and a control panel; the fluorine path between the three bodies, that is, the fluorine path between the outdoor heat exchanger and the indoor heat exchanger and the hot water heat exchanger, needs to be connected by two groups of four detachable connecting pipes.

5. The two-capillary self-throttling four-circulation cold and warm water machine according to claim 1 is characterized in that: its hot water heat exchanger is a plate heat exchanger or a sleeve heat exchanger, and when it is installed in the outdoor body, its fluorine circulation loop is a two-body structure; the hot water heat exchanger installed in the outdoor body is connected to the second outlet of the compressor and the first interface of the first and second capillary throttles, all by welding; the water circuit of the hot water heat exchanger is interconnected with the hot water tank through the hot water circulation loop, and the hot water circulation loop is equipped with a hot water circulation pump.

6. The two-capillary self-throttling four-cycle cold and warm water heater according to claim 1 is characterized in that: when the indoor heat exchanger is a water heat exchanger for air conditioning and heating, the water heat exchanger is moved and installed on the top of the outdoor body, and the fluorine circuits formed are concentrated in the outdoor body, which is called an integrated two-capillary self-throttling four-cycle cold and warm water heater; the indoor air conditioning and heating functions of the integrated two-capillary self-throttling four-cycle cold and warm water heater are completed by the air-conditioning water circulation circuit and circulating water pump connected to the water heat exchanger and the indoor fan coil heat exchanger; during the refrigeration cycle, the water heat exchanger produces chilled water, the circulating water pump runs, and the chilled water passes through the coil fan to blow cold air into the room; during the heating cycle, the water heat exchanger produces hot water for heating, the circulating water pump runs, and the hot water for heating passes through the coil fan to blow warm air into the room.

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