Air-conditioning water heater system

Abstract

The utility model discloses an air conditioner water heater system which comprises a compressor, a water heat exchanger, an indoor heat exchanger, an outdoor heat exchanger and a four-way valve and further comprises a first throttler and a second throttler. The outlet end of the indoor heat exchanger and the outlet end of the outdoor heat exchanger are both connected with the four-way valve, the inlet end of the water heat exchanger is connected with the four-way valve, and the outlet end of the water heat exchanger is connected with the inlet end of the outdoor heat exchanger through a first throttler and connected with the inlet end of the indoor heat exchanger through a second throttler. Therefore, the utility model provides the air-conditioning water heater system with a brand new structure, and the air-conditioning water heater system is reasonable in design, simple in overall structure and strong in functionality.

Description

Technical Field

[0001] The utility model belongs to the technical field of refrigeration equipment, and is specifically an air-conditioning water heater system. Background Art

[0002] In the environment where people live today, most of them use water heaters to provide hot water and air conditioners to provide heating / cooling. During use, both water heaters and air conditioners require two power systems to function, which increases the cost. At the same time, during use, the heat from water heated by traditional air-energy water heaters cannot be fully utilized, resulting in energy waste; and in the existing water heater-air conditioner integrated unit, water flow is used to take away excess heat, and the system is large and cannot be miniaturized, which brings inconvenience to installation.

[0003] As shown in the Chinese invention patent application with publication number CN 103471196A, it discloses an air-conditioning water heater system, including a compressor, a water heat exchanger, an outdoor heat exchanger, an indoor heat exchanger, a control system, a water tank and a control valve connected to the control system, the compressor and the water tank are both connected to the water heat exchanger, the first three-way valve, the first throttling element, the indoor heat exchanger and the four-way valve form a cold recovery loop; the first three-way valve, the first solenoid valve, the expansion valve, the outdoor heat exchanger and the second three-way valve form a heat energy absorption loop; the first three-way valve, the four-way valve, the indoor heat exchanger, the first one-way valve, the expansion valve, the outdoor heat exchanger and the second three-way valve form a heating channel; the first three-way valve, the outdoor heat exchanger, the second three-way valve, the second throttling component, the indoor heat exchanger and the four-way valve form a cold air heat recovery loop.

[0004] The above-disclosed air-conditioning water heater system has the characteristics of improving the comprehensive utilization of energy, reducing secondary emissions, achieving environmental protection and energy saving, low cost of use, and easy installation. However, the system is provided with both a three-way valve and a four-way valve, the system structure is relatively complex and the cost is relatively high, and there is room for improvement. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides an air-conditioning water heater system, which effectively solves the problem of complex system structure in the prior art in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an air-conditioning water heater system, comprising a compressor, a water heat exchanger, an indoor heat exchanger, an outdoor heat exchanger and a four-way valve, and also comprising a first throttle and a second throttle, the exhaust port and the air intake port of the compressor are both connected to the four-way valve, the outlet ends of the indoor heat exchanger and the outdoor heat exchanger are both connected to the four-way valve, the inlet end of the water heat exchanger is connected to the four-way valve, and the outlet end is connected to the inlet end of the outdoor heat exchanger through the first throttle and connected to the inlet end of the indoor heat exchanger through the second throttle.

[0007] Therefore, the utility model provides an air-conditioning water heater system with a brand-new structure. The air-conditioning water heater system has a simple overall structure through reasonable design and only requires a four-way valve and two throttling elements to realize its functions.

[0008] Preferably, the air conditioning water heater system further comprises a first one-way valve, the first one-way valve is connected in parallel with the first throttle, and the first one-way valve is connected in series with the second throttle.

[0009] Preferably, the air conditioning water heater system further comprises a second one-way valve, which is connected in series with the first throttle and the second throttle and is arranged between the two.

[0010] Preferably, the air conditioning water heater system further includes a solenoid valve, which is connected in parallel with the second one-way valve.

[0011] Preferably, the four-way valve comprises a valve body having a valve cavity, and a first connecting pipe, a second connecting pipe, a third connecting pipe and a fourth connecting pipe connected to the valve cavity.

[0012] Preferably, there is one four-way valve, the first connecting pipe is connected to the exhaust port of the compressor, the third connecting pipe is connected to the intake port of the compressor, the second connecting pipe is connected to the outlet end of the outdoor heat exchanger, the third connecting pipe is connected to the outlet end of the indoor heat exchanger, and the fourth connecting pipe is connected to the inlet end of the water heat exchanger.

[0013] Preferably, the four-way valve includes a first four-way valve and a second four-way valve, the first connecting pipe of the first four-way valve is connected to the exhaust port of the compressor, the third connecting pipe of the first four-way valve and the third connecting pipe of the second four-way valve are both connected to the suction port of the compressor, the second connecting pipe of the first four-way valve is connected to the first connecting pipe of the second four-way valve, the fourth connecting pipe of the first four-way valve is connected to the inlet end of the water heat exchanger, the fourth connecting pipe of the second four-way valve is connected to the outlet end of the indoor heat exchanger, and the second connecting pipe of the second four-way valve is connected to the outlet end of the outdoor heat exchanger.

[0014] Preferably, when the second throttle is closed:

[0015] The exhaust port of the compressor, the first connecting pipe of the four-way valve, the fourth connecting pipe of the four-way valve, the water heat exchanger, the first throttle, the outdoor heat exchanger, the second connecting pipe of the four-way valve, the third connecting pipe of the four-way valve, and the air intake port of the compressor form a separate hot water circuit;

[0016] The exhaust port of the compressor, the first connecting pipe of the four-way valve, the second connecting pipe of the four-way valve, the outdoor heat exchanger, the first throttle, the water heat exchanger, the third connecting pipe of the four-way valve, the fourth connecting pipe of the four-way valve, and the air intake port of the compressor form a defrosting circuit;

[0017] With the first throttle closed:

[0018] The exhaust port of the compressor, the first connecting pipe of the four-way valve, the fourth connecting pipe of the four-way valve, the water heat exchanger, the first non-return valve, the second throttle, the indoor heat exchanger, and the air intake port of the compressor form a hot water making and air conditioning refrigeration circuit;

[0019] The exhaust port of the compressor, the first connecting pipe of the four-way valve, the second connecting pipe of the four-way valve, the outdoor heat exchanger, the second one-way valve, the second throttle, the indoor heat exchanger, and the air intake port of the compressor form a separate air conditioning refrigeration circuit.

[0020] Preferably, when the second throttle is closed:

[0021] The exhaust port of the compressor, the first connecting pipe of the first four-way valve, the fourth connecting pipe of the first four-way valve, the water heat exchanger, the first throttle, the outdoor heat exchanger, the second connecting pipe of the second four-way valve, the third connecting pipe of the second four-way valve, and the air intake port of the compressor form a separate hot water circuit;

[0022] The exhaust port of the compressor, the first connecting pipe of the first four-way valve, the second connecting pipe of the first four-way valve, the first connecting pipe of the second four-way valve, the second connecting pipe of the second four-way valve, the outdoor heat exchanger, the first throttle, the water heat exchanger, the third connecting pipe of the first four-way valve, the fourth connecting pipe of the first four-way valve, and the air intake port of the compressor form a defrosting circuit;

[0023] With the first throttle closed:

[0024] The exhaust port of the compressor, the first connecting pipe of the first four-way valve, the fourth connecting pipe of the first four-way valve, the water heat exchanger, the first non-return valve, the second throttle, the indoor heat exchanger, the fourth connecting pipe of the second four-way valve, the third connecting pipe of the second four-way valve, and the air intake port of the compressor form a hot water making and air conditioning refrigeration circuit;

[0025] The exhaust port of the compressor, the first connecting pipe of the first four-way valve, the second connecting pipe of the first four-way valve, the first connecting pipe of the second four-way valve, the second connecting pipe of the second four-way valve, the outdoor heat exchanger, the second one-way valve, the second throttle, the indoor heat exchanger, the fourth connecting pipe of the second four-way valve, the third connecting pipe of the second four-way valve, and the air intake port of the compressor form a separate air conditioning refrigeration circuit;

[0026] The exhaust port of the compressor, the first connecting pipe of the first four-way valve, the second connecting pipe of the first four-way valve, the first connecting pipe of the second four-way valve, the fourth connecting pipe of the second four-way valve, the indoor heat exchanger, the second throttle, the solenoid valve, the outdoor heat exchanger, the second connecting pipe of the second four-way valve, the third connecting pipe of the second four-way valve, and the air intake port of the compressor form a separate air conditioning heating circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0028] In the attached picture:

[0029] Figure 1 This is a simplified structural diagram of an air conditioning water heater system according to Embodiment 1 of the present utility model;

[0030] Figure 2 for Figure 1 A simplified structural diagram of a four-way valve of an air conditioning water heater system is shown;

[0031] Figure 3 It is a simplified structural diagram of the air-conditioning water heater system of the second embodiment of the utility model.

[0032] In the figure: 1- compressor; 2- water heat exchanger; 3- outdoor heat exchanger; 4- indoor heat exchanger; 5- first throttle; 6- second throttle; 7- four-way valve; 7a- first four-way valve; 7b- second four-way valve; 8- first check valve; 9- second check valve; 10- solenoid valve; 71, valve body; 72D- first connecting pipe; 72E- second connecting pipe; 72S- third connecting pipe; 72C- fourth connecting pipe. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with 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 of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0034] Embodiment 1, by Figure 1 to Figure 2 It is given that the air conditioning water heater system of this embodiment includes a compressor 1, a water heat exchanger 2, an indoor heat exchanger 4, an outdoor heat exchanger 3 and a four-way valve 7, and also includes a first throttle 5 and a second throttle 6. The exhaust port and the air intake port of the compressor 1 are connected to the four-way valve 7, the outlet ends of the indoor heat exchanger 4 and the outdoor heat exchanger 3 are connected to the four-way valve 7, the inlet end of the water heat exchanger 2 is connected to the four-way valve 7, and the outlet end is connected to the inlet end of the outdoor heat exchanger 3 through the first throttle 5 and is connected to the inlet end of the indoor heat exchanger 4 through the second throttle 6.

[0035] The air conditioning water heater system further includes a first one-way valve 8 , which is connected in parallel with the first throttle 5 , and in series with the second throttle 6 .

[0036] The air conditioning water heater system further includes a second one-way valve 9 , which is connected in series with the first throttle 5 and the second throttle 6 and is disposed therebetween.

[0037] The four-way valve 7 includes a valve body 71 having a valve cavity, and a first connecting pipe 72D, a second connecting pipe 72E, a third connecting pipe 72S and a fourth connecting pipe 72C connected to the valve cavity.

[0038] There is one four-way valve 7, the first connecting pipe 72D is connected to the exhaust port of the compressor 1, the third connecting pipe 72S is connected to the intake port of the compressor 1, the second connecting pipe 72E is connected to the outlet end of the outdoor heat exchanger 3, the third connecting pipe 72S is connected to the outlet end of the indoor heat exchanger 4, and the fourth connecting pipe 72C is connected to the inlet end of the water heat exchanger 2.

[0039] The working principle of this embodiment is as follows:

[0040] When the second throttle 6 is closed:

[0041] The exhaust port of the compressor 1, the first connecting pipe 72D of the four-way valve 7, the fourth connecting pipe 72C of the four-way valve 7, the water heat exchanger 2, the first throttle 5, the outdoor heat exchanger 3, the second connecting pipe 72E of the four-way valve 7, the third connecting pipe 72S of the four-way valve 7, and the air intake port of the compressor 1 form a separate hot water circuit;

[0042] The exhaust port of the compressor 1, the first connecting pipe 72D of the four-way valve 7, the second connecting pipe 72E of the four-way valve 7, the outdoor heat exchanger 3, the first throttle 5, the water heat exchanger 2, the third connecting pipe 72S of the four-way valve 7, the fourth connecting pipe 72C of the four-way valve 7, and the air intake port of the compressor 1 form a defrosting circuit;

[0043] When the first throttle 5 is closed:

[0044] The exhaust port of the compressor 1, the first connecting pipe 72D of the four-way valve 7, the fourth connecting pipe 72C of the four-way valve 7, the water heat exchanger 2, the first non-return valve 8, the second throttle 6, the indoor heat exchanger 4, and the air intake port of the compressor 1 form a hot water making and air conditioning refrigeration circuit;

[0045] The exhaust port of the compressor 1, the first connecting pipe 72D of the four-way valve 7, the second connecting pipe 72E of the four-way valve 7, the outdoor heat exchanger 3, the second non-return valve 9, the second throttle 6, the indoor heat exchanger 4, and the air intake port of the compressor 1 form a separate air conditioning refrigeration circuit.

[0046] The utility model provides an air-conditioning water heater system with a brand-new structure. The air-conditioning water heater system has a simple overall structure through reasonable design and only needs a four-way valve 7 and two throttling elements to realize the function.

[0047] Embodiment 2, by Figure 3 It is given that the structure of the air-conditioning water heater system of this embodiment is basically the same as the structure of the air-conditioning water heater system of the first embodiment, except that: (1) the number of four-way valves 7 is different; and (2) a solenoid valve 10 is provided.

[0048] like Figure 3 As shown, the air conditioning water heater system of this embodiment further includes a solenoid valve 10 , and the solenoid valve 10 is connected in parallel with the second one-way valve 9 .

[0049] The four-way valve 7 includes a first four-way valve 7a and a second four-way valve 7b. The first connecting pipe 72D of the first four-way valve 7a is connected to the exhaust port of the compressor 1, the third connecting pipe 72S of the first four-way valve 7a and the third connecting pipe 72S of the second four-way valve 7b are both connected to the suction port of the compressor 1, the second connecting pipe 72E of the first four-way valve 7a is connected to the first connecting pipe 72D of the second four-way valve 7b, the fourth connecting pipe 72C of the first four-way valve 7a is connected to the inlet end of the water heat exchanger 2, the fourth connecting pipe 72C of the second four-way valve 7b is connected to the outlet end of the indoor heat exchanger 4, and the second connecting pipe 72E of the second four-way valve 7b is connected to the outlet end of the outdoor heat exchanger 3.

[0050] The working principle of this embodiment is as follows:

[0051] When the second throttle 6 is closed:

[0052] The exhaust port of the compressor 1, the first connecting pipe 72D of the first four-way valve 7a, the fourth connecting pipe 72C of the first four-way valve 7a, the water heat exchanger 2, the first throttle 5, the outdoor heat exchanger 3, the second connecting pipe 72E of the second four-way valve 7b, the third connecting pipe 72S of the second four-way valve 7b, and the air intake port of the compressor 1 form a separate hot water circuit;

[0053] The exhaust port of the compressor 1, the first connecting pipe 72D of the first four-way valve 7a, the second connecting pipe 72E of the first four-way valve 7a, the first connecting pipe 72D of the second four-way valve 7b, the second connecting pipe 72E of the second four-way valve 7b, the outdoor heat exchanger 3, the first throttle 5, the water heat exchanger 2, the third connecting pipe 72S of the first four-way valve 7a, the fourth connecting pipe 72C of the first four-way valve 7a, and the air intake port of the compressor 1 form a defrosting circuit;

[0054] When the first throttle 5 is closed:

[0055] The exhaust port of the compressor 1, the first connecting pipe 72D of the first four-way valve 7a, the fourth connecting pipe 72C of the first four-way valve 7a, the water heat exchanger 2, the first non-return valve 8, the second throttle 6, the indoor heat exchanger 4, the fourth connecting pipe 72C of the second four-way valve 7b, the third connecting pipe 72S of the second four-way valve 7b, and the air intake port of the compressor 1 form a hot water making and air conditioning refrigeration circuit;

[0056] The exhaust port of the compressor 1, the first connecting pipe 72D of the first four-way valve 7a, the second connecting pipe 72E of the first four-way valve 7a, the first connecting pipe 72D of the second four-way valve 7b, the second connecting pipe 72E of the second four-way valve 7b, the outdoor heat exchanger 3, the second non-return valve 9, the second throttle 6, the indoor heat exchanger 4, the fourth connecting pipe 72C of the second four-way valve 7b, the third connecting pipe 72S of the second four-way valve 7b, and the air intake port of the compressor 1 form a separate air conditioning refrigeration circuit;

[0057] The exhaust port of the compressor 1, the first connecting pipe 72D of the first four-way valve 7a, the second connecting pipe 72E of the first four-way valve 7a, the first connecting pipe 72D of the second four-way valve 7b, the fourth connecting pipe 72C of the second four-way valve 7b, the indoor heat exchanger 4, the second throttle 6, the solenoid valve 10, the outdoor heat exchanger 3, the second connecting pipe 72E of the second four-way valve 7b, the third connecting pipe 72S of the second four-way valve 7b, and the air intake port of the compressor 1 form a separate air conditioning heating circuit.

[0058] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air conditioning water heater system, comprising a compressor (1), a water heat exchanger (2), an indoor heat exchanger (4), an outdoor heat exchanger (3) and a four-way valve (7), characterized in that: It also comprises a first throttle (5) and a second throttle (6), a first non-return valve (8) and a second non-return valve (9); the exhaust port and the air intake port of the compressor (1) are both connected to the four-way valve (7); the outlet ends of the indoor heat exchanger (4) and the outdoor heat exchanger (3) are both connected to the four-way valve (7); the inlet end of the water heat exchanger (2) is connected to the four-way valve (7); the outlet end is respectively connected to the inlet end of the outdoor heat exchanger (3) through the first throttle (5) and connected to the inlet end of the indoor heat exchanger (4) through the second throttle (6); The first one-way valve (8) is connected in parallel with the first throttle (5), and the first one-way valve (8) is connected in series with the second throttle (6); The second one-way valve (9) is connected in series with the first throttle (5) and the second throttle (6) and is arranged between the two.

2. The air conditioning water heater system according to claim 1, characterized in that: The four-way valve (7) comprises a valve body (71) having a valve cavity, and a first connecting pipe (72D), a second connecting pipe (72E), a third connecting pipe (72S) and a fourth connecting pipe (72C) which are connected to the valve cavity.

3. The air conditioning water heater system according to claim 2, characterized in that: The four-way valve (7) is one, the first connecting pipe (72D) is connected to the exhaust port of the compressor (1), the third connecting pipe (72S) is connected to the intake port of the compressor (1), the second connecting pipe (72E) is connected to the outlet end of the outdoor heat exchanger (3), the third connecting pipe (72S) is connected to the outlet end of the indoor heat exchanger (4), and the fourth connecting pipe (72C) is connected to the inlet end of the water heat exchanger (2).

4. The air conditioning water heater system according to claim 3, characterized in that: When the second throttle (6) is closed: The exhaust port of the compressor (1), the first connecting pipe (72D) of the four-way valve (7), the fourth connecting pipe (72C) of the four-way valve (7), the water heat exchanger (2), the first throttle (5), the outdoor heat exchanger (3), the second connecting pipe (72E) of the four-way valve (7), the third connecting pipe (72S) of the four-way valve (7), and the air intake port of the compressor (1) form a separate hot water circuit; The exhaust port of the compressor (1), the first connecting pipe (72D) of the four-way valve (7), the second connecting pipe (72E) of the four-way valve (7), the outdoor heat exchanger (3), the first throttle (5), the water heat exchanger (2), the third connecting pipe (72S) of the four-way valve (7), the fourth connecting pipe (72C) of the four-way valve (7), and the air intake port of the compressor (1) form a defrosting circuit; When the first throttle (5) is closed: The exhaust port of the compressor (1), the first connecting pipe (72D) of the four-way valve (7), the fourth connecting pipe (72C) of the four-way valve (7), the water heat exchanger (2), the first non-return valve (8), the second throttle (6), the indoor heat exchanger (4), and the air intake port of the compressor (1) form a hot water production and air conditioning refrigeration circuit; The exhaust port of the compressor (1), the first connecting pipe (72D) of the four-way valve (7), the second connecting pipe (72E) of the four-way valve (7), the outdoor heat exchanger (3), the second non-return valve (9), the second throttle (6), the indoor heat exchanger (4), and the air intake port of the compressor (1) form a separate air conditioning refrigeration circuit.

5. The air conditioning water heater system according to claim 2, characterized in that: The four-way valve (7) comprises a first four-way valve (7a) and a second four-way valve (7b); the first connecting pipe (72D) of the first four-way valve (7a) is connected to the exhaust port of the compressor (1); the third connecting pipe (72S) of the first four-way valve (7a) and the second four-way valve (7b) are both connected to the intake port of the compressor (1); the second connecting pipe (72E) of the first four-way valve (7a) is connected to the first connecting pipe (72D) of the second four-way valve (7b); the fourth connecting pipe (72C) of the first four-way valve (7a) is connected to the inlet end of the water heat exchanger (2); the fourth connecting pipe (72C) of the second four-way valve (7b) is connected to the outlet end of the indoor heat exchanger (4); and the second connecting pipe (72E) of the second four-way valve (7b) is connected to the outlet end of the outdoor heat exchanger (3).

6. The air conditioning water heater system according to claim 5, characterized in that: It also comprises a solenoid valve (10), wherein the solenoid valve (10) is connected in parallel with the second one-way valve (9).

7. The air conditioning water heater system according to claim 6, characterized in that: When the second throttle (6) is closed: The exhaust port of the compressor (1), the first connecting pipe (72D) of the first four-way valve (7a), the fourth connecting pipe (72C) of the first four-way valve (7a), the water heat exchanger (2), the first throttle (5), the outdoor heat exchanger (3), the second connecting pipe (72E) of the second four-way valve (7b), the third connecting pipe (72S) of the second four-way valve (7b), and the air intake port of the compressor (1) form a separate hot water circuit; The exhaust port of the compressor (1), the first connecting pipe (72D) of the first four-way valve (7a), the second connecting pipe (72E) of the first four-way valve (7a), the first connecting pipe (72D) of the second four-way valve (7b), the second connecting pipe (72E) of the second four-way valve (7b), the outdoor heat exchanger (3), the first throttle (5), the water heat exchanger (2), the third connecting pipe (72S) of the first four-way valve (7a), the fourth connecting pipe (72C) of the first four-way valve (7a), and the air intake port of the compressor (1) form a defrosting circuit; When the first throttle (5) is closed: The exhaust port of the compressor (1), the first connecting pipe (72D) of the first four-way valve (7a), the fourth connecting pipe (72C) of the first four-way valve (7a), the water heat exchanger (2), the first non-return valve (8), the second throttle (6), the indoor heat exchanger (4), the fourth connecting pipe (72C) of the second four-way valve (7b), the third connecting pipe (72S) of the second four-way valve (7b), and the air intake port of the compressor (1) form a hot water production and air conditioning refrigeration circuit; The exhaust port of the compressor (1), the first connecting pipe (72D) of the first four-way valve (7a), the second connecting pipe (72E) of the first four-way valve (7a), the first connecting pipe (72D) of the second four-way valve (7b), the second connecting pipe (72E) of the second four-way valve (7b), the outdoor heat exchanger (3), the second non-return valve (9), the second throttle (6), the indoor heat exchanger (4), the fourth connecting pipe (72C) of the second four-way valve (7b), the third connecting pipe (72S) of the second four-way valve (7b), and the air intake port of the compressor (1) form a separate air conditioning refrigeration circuit; The exhaust port of the compressor (1), the first connecting pipe (72D) of the first four-way valve (7a), the second connecting pipe (72E) of the first four-way valve (7a), the first connecting pipe (72D) of the second four-way valve (7b), the fourth connecting pipe (72C) of the second four-way valve (7b), the indoor heat exchanger (4), the second throttle (6), the solenoid valve (10), the outdoor heat exchanger (3), the second connecting pipe (72E) of the second four-way valve (7b), the third connecting pipe (72S) of the second four-way valve (7b), and the air intake port of the compressor (1) form a separate air conditioning heating circuit.

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