WO2019076144A1

WO2019076144A1 - Sleeve-type heat pump capable of changing direction of working medium

Info

Publication number: WO2019076144A1
Application number: PCT/CN2018/103185
Authority: WO
Inventors: 韦春东
Original assignee: 韦春东
Priority date: 2017-10-20
Filing date: 2018-08-30
Publication date: 2019-04-25
Also published as: CN107687723A; CN107687723B

Abstract

Provided is a sleeve-type heat pump capable of changing the direction of working medium. The heat pump comprises a refrigerant circulation loop, the refrigerant circulation loop being formed of a compressor (1), a heat pump reversing valve, a shell pass (54) of a heat exchange sleeve (5) of a self-circulation sleeve-type heat exchanger, an expansion valve (3), an evaporator (2) and a water storage tank (6), which are connected in sequence, wherein the self-circulation sleeve-type heat exchanger comprises N heat exchange sleeves (5) arranged in parallel, each of the heat exchange sleeve comprising a pipe pass (55) and a shell pass (54); the pipe passes (55) are serially connected by means of a pipe pass three-way pipe (56) which is in communication with the water storage tank (6); a water inlet (512) of each of the heat exchange sleeves (5) is in communication with a water source pipe (71) and the water storage tank (6); and the shell passes (54) are serially connected by means of shell pass connection pipes (57).

Description

Casing heat pump with variable working fluidity

Technical field

The invention belongs to the technical field of electrical equipment and electrical engineering, and relates to a water heater, in particular to a heat pump water heater which improves heat exchange efficiency by changing the flow direction of the refrigerant working medium and the flow direction of the water.

Background technique

At present, the condenser technology of heat pump water heaters on the market generally uses casing, water tank inner coil and water tank outer coil.

Although the prior art casing heat exchanger has a simple structure and small volume, it needs to match the circulating water pump and the complicated waterway design in the work. Since the water pump consumes about 5% of the power of the compressor, the efficiency is generally not high, expensive and complicated. The characteristics make it generally used in commercial machines; the coil inside the water tank is fixed inside the water tank, and the heat exchange rate is high, but the long-term use of scale-prone scale affects the thermal efficiency, although most of them are equipped with built-in magnesium rods to reduce scale and corrosion, but The scale and corrosion are not completely eliminated. The life of the water tank is slightly shorter. It is necessary to replace the magnesium rod regularly and remove the dirt and sediment. Although the outer coil is safe, the thermal efficiency is low and the heating is slow. Due to the repeated influence of thermal expansion and contraction, the disc The pipe wall is easy to separate, the inner casing is easy to burst, the process required to overcome the problem is high, the production is difficult and the cost is high.

In addition, the heat pump condensing heat exchanger made by the prior art is too large in volume to match the water tank, which is unacceptable to most consumers; and the unreasonable setting of the condensing heat exchanger leads to long-term high-load work of the compressor, which accelerates the lubrication of the compressor. The cracking and aging of the oil shortens the working life of the compressor.

Summary of the invention

The object of the present invention is to provide a casing type heat pump with simple structure, small space occupation, low energy consumption, high heat exchange efficiency and long service life, which is directed to the prior art. It is not necessary to provide a circulating water pump to allow the refrigerant working fluid to change work according to the change of the water flow direction, to achieve the purpose of self-circulating heat exchange, and effectively improve the heat exchange efficiency and rate.

The technical solution for solving the above technical problem is: a casing type heat pump with a working medium change direction, comprising a compressor, a heat pump reversing valve, a self-circulating sleeve type heat exchanger, an expansion valve, an evaporator and a water storage tank, The self-circulating sleeve heat exchanger comprises a heat exchange sleeve arranged in parallel with N steps, the heat exchange sleeve comprising a tube length and a shell side wrapped outside the tube tube; the tube tubes are sequentially connected in series through a tube-passing tee tube The third interface I of the high-end tube-passing tee communicates with the upper end of the water storage tank through the electromagnetic water valve, and the third interface II of the low-end tube-passing tee passes through the one-way check valve and the lower end of the water storage tank respectively. The interface is connected; the tube of the first-stage heat exchange sleeve is provided with a water inlet, the water inlet is connected to the water source tube through a one-way check valve, and the water inlet is also connected with the water storage tank; The lower end of the tube end of the heat transfer sleeve is provided with a low-end water port, and the low-end water port is connected with the high-speed water inlet of the lower end of the water storage tank; the shell side is connected in series through the shell-side connecting tube, in the first step The shell side of the heat exchange sleeve is provided with a first working medium interface, at a second working medium interface is disposed at a lower end of the shell side of the heat exchange sleeve of the last stage, and the first working medium interface and the second working medium interface are respectively connected with the heat pump reversing valve, the compressor, the heat pump reversing valve, and the heat exchange The shell side of the sleeve, the expansion valve and the evaporator are sequentially connected to form a refrigerant working medium circulation loop; the heat exchange sleeve of the self-circulating sleeve type heat exchanger is a non-horizontal structure that is erected or has a certain inclination angle.

According to a further technical solution of the present invention, the number N of the heat exchange sleeve is 1 , and the water inlet of the upper end of the tube of the heat exchange sleeve is connected to the water source tube through the one-way check valve, and the water inlet is further The electromagnetic water valve is connected to the upper end of the water storage tank, and the low-end water interface of the tube-passing is connected with the high-speed water inlet of the water storage tank; the first working medium interface and the second working of the shell side of the heat exchange sleeve The mass interface is connected to the heat pump reversing valve.

The heat pump reversing valve includes a main valve and a pilot valve connected to the main valve through a capillary tube; the main valve includes a valve body and a valve body wrapped in the valve body, the valve body defines a valve cavity, and the valve body has a relative valve cavity a first sidewall and a second sidewall disposed, the two ends of the valve core and the inner wall of the valve respectively define a first piston chamber and a second piston chamber, wherein the pilot valve passes through the capillary and the first piston chamber respectively The second piston chamber is connected, and the pilot valve controls the valve core to move left and right in the valve body; the first side wall of the valve body is provided with a first refrigerant connecting tube, and the second side wall of the valve body is respectively provided with a second refrigerant a first refrigerant connection and a fourth refrigerant connection, wherein the first refrigerant connection is in communication with a high pressure exhaust pipe of the compressor, the second refrigerant connection is in communication with the first working medium, and the third refrigerant is in contact with The second refrigerant interface is connected to the expansion valve; the fourth refrigerant connection is connected to the expansion valve; the valve core is an arched valve core, and when the valve core moves to the first piston chamber end, the first refrigerant connection tube and the third refrigerant connection tube lead Pass, and the fourth refrigerant take-over and the second refrigerant take over ; When the spool is moved to the second piston chamber when the end of the first refrigerant and the second refrigerant takeover took conduction, and the third and the fourth refrigerant refrigerant takeover took conduction.

According to still another technical solution of the present invention, the number N of the heat exchange sleeves is 2, including a first-pass heat exchange sleeve and a final-pass heat transfer sleeve, and the first-pass heat exchange sleeve and the final pass The upper end of the tube length of the heat exchange sleeve is connected through the tube-passing tee, and the water inlet of the lower end of the tube of the first-pass heat exchange sleeve is connected to the water source tube through the one-way check valve, and the water inlet is also passed through the one-way check. The water valve is connected to the lower end of the water storage tank, and the low-end water interface of the tube end of the last-pass heat exchange sleeve is connected with the high-speed water inlet at the bottom of the water storage tank, and the third interface I of the tube-passing tee passes the electromagnetic water valve The upper end interface of the water storage tank is connected; the upper end of the shell side of the first-pass heat exchange sleeve and the last-pass heat exchange sleeve is connected through the shell-side connecting tube, and the shell side of the first-pass heat exchange sleeve and the last-pass heat exchange sleeve The lower end is respectively provided with a first working medium interface and a second working medium interface, and the shell-side connecting tube is further provided with a third working medium interface, wherein the first working medium interface, the second working medium interface and the third working medium interface are respectively The heat pump reversing valve is connected.

The heat pump reversing valve includes a main valve and a pilot valve connected to the main valve through a capillary tube; the main valve includes a valve body and a valve body wrapped in the valve body, the valve body defines a valve cavity, and the valve body has a relative valve cavity a first sidewall and a second sidewall disposed, the two ends of the valve core and the inner wall of the valve respectively define a first piston chamber and a second piston chamber, wherein the pilot valve passes through the capillary and the first piston chamber respectively The two piston chambers are connected, and the pilot valve controls the valve core to move left and right in the valve body; the first side wall of the valve body is respectively provided with a first refrigerant connecting tube and a second refrigerant connecting tube, and the second side wall of the valve body is respectively provided with a first a third refrigerant connection and a fourth refrigerant connection, wherein the first refrigerant connection is in communication with a high pressure exhaust pipe of the compressor, the second refrigerant connection is in communication with a third working medium, the third refrigerant connection and the second working medium The fourth refrigerant connection is in communication with the first working medium interface and the expansion valve; the first side channel and the second passage are disposed on both sides of the valve core, and the position of the valve core on one of the end portions is radially opened a third passage through the outer surface of the spool, When the spool moves to the first piston chamber end, the first refrigerant connecting tube and the third refrigerant connecting tube are turned on through the third passage, and the second refrigerant connecting tube and the fourth refrigerant connecting tube are blocked; when the spool moves to the second piston chamber At the end, the first refrigerant pipe and the second refrigerant pipe are electrically connected through the first passage, and the third refrigerant pipe and the fourth refrigerant pipe are electrically connected through the second channel.

According to still another technical solution of the present invention, the number N of the heat exchange sleeves is an odd number greater than 2, including a first pass heat transfer sleeve, an intermediate length heat transfer sleeve, and a final heat exchange sleeve, each of which The tube process of the heat exchange sleeve is sequentially connected in series through the tube-passing tee, and the water inlet of the upper end of the tube of the first-pass heat exchange sleeve is connected to the water source tube through the one-way check valve, and the water inlet is also passed through the electromagnetic water valve and the water storage port. The upper end interface of the tank is connected; the low-end water port of the pipe end of the last-pass heat exchange casing is connected with the high-speed water inlet of the water storage tank; the third port I of the high-end pipe-way tee is respectively passed through the electromagnetic water valve and the water storage The upper end interface of the box is connected, and the third interface II of the tube-passing tee tube at the low end is respectively connected to the lower end interface of the water storage tank through a one-way check valve; the shell sides of the heat exchange sleeves are sequentially connected through the shell side. The tube is connected in series, and the first working medium interface is disposed at the upper end of the shell side of the first-pass heat exchange sleeve, and the second working medium interface is disposed at the lower end of the shell-side heat transfer sleeve, and the third shell is located at the high-end shell-side connecting tube. Working medium interface, the low-end shell-side connecting pipe is provided with a fourth working medium interface, Working fluid interfaces, the interface of the second working fluid, the working fluid interfaces third and fourth interfaces are connected to the working fluid of the heat pump reversing valve.

The heat pump reversing valve includes a main valve and a pilot valve connected to the main valve through a capillary tube; the main valve includes a valve body and a valve body wrapped in the valve body, the valve body defines a valve cavity, and the valve body has a relative valve cavity a first sidewall and a second sidewall disposed, the two ends of the valve core and the inner wall of the valve respectively define a first piston chamber and a second piston chamber, wherein the pilot valve passes through the capillary and the first piston chamber respectively The two piston chambers are connected, and the pilot valve controls the spool to move left and right in the valve body; the first side wall of the valve body is respectively provided with a first refrigerant connecting tube, a second refrigerant connecting tube and a refrigerant corresponding to the number of the third working medium interface The first side wall of the valve body is respectively provided with a third refrigerant connecting pipe, a fourth refrigerant connecting pipe and a refrigerant connecting pipe II corresponding to the number of the fourth working medium interface; the high-pressure exhausting of the first refrigerant connecting pipe and the compressor The second refrigerant connection is connected to the first working medium interface, the third refrigerant connection is connected with the second working medium interface, the fourth refrigerant connection is connected with the expansion valve, and the third working medium interface is connected with the refrigerant connection I one to one. Fourth working medium interface The first and second passages are respectively opened in the axial direction on both sides of the valve core, and the position of the valve core on one of the end portions is radially opened through the outer surface of the valve core. a third passage, the outer circumferential surface of the valve core is provided with a recessed fourth passage; when the spool moves to the first piston chamber end, the first refrigerant connection and the third refrigerant connection are electrically connected through the third passage, and the second refrigerant takes over The fourth refrigerant passage is electrically connected to the fourth passage, and the refrigerant connection tubes I are not electrically connected to each other, and the refrigerant connection tubes II are not electrically connected to each other; when the spool moves to the second piston chamber end, the first refrigerant connection tube and the second refrigerant medium The take-up and refrigerant connection I are conducted through the first passage, and the third refrigerant connection, the fourth refrigerant connection, and the refrigerant connection II are electrically conducted through the second passage.

According to still another technical solution of the present invention, the number N of the heat exchange sleeves is an even number greater than 2, including a first pass heat transfer sleeve, an intermediate heat transfer sleeve, and a final heat transfer sleeve, each of which The tube process of the heat exchange sleeve is sequentially connected in series through the tube-passing tee, and the water inlet of the lower end of the tube of the first-pass heat exchange sleeve is connected to the water source tube through the one-way check valve, and the water inlet is also passed through the one-way check valve. It is connected with the lower end interface of the water storage tank; the low-end water interface of the tube end of the final heat exchange sleeve is connected with the high-speed water inlet of the water storage tank; the third interface I of the high-end tube-passing tee passes through the electromagnetic water valve respectively The third interface II of the tube-passing tee at the lower end is connected to the lower end of the water storage tank through a one-way check valve; the shell side of each heat exchange sleeve passes through The shell-side connecting tube is connected in series, and the first working medium interface is arranged at the lower end of the shell side of the first-pass heat exchange sleeve, and the second working medium interface is provided at the lower end of the shell-side heat-exchange sleeve, and the high-end shell-side connecting tube is located There is a third working medium interface, and the shell-side connecting pipe at the low end is provided with a fourth working medium interface. The first working fluid interfaces, the interface of the second working fluid, the working fluid interfaces third and fourth interfaces are connected to the working fluid of the heat pump reversing valve.

The heat pump reversing valve includes a main valve and a pilot valve connected to the main valve through a capillary tube; the main valve includes a valve body and a valve body wrapped in the valve body, the valve body defines a valve cavity, and the valve body has a relative valve cavity a first sidewall and a second sidewall disposed, the two ends of the valve core and the inner wall of the valve respectively define a first piston chamber and a second piston chamber, wherein the pilot valve passes through the capillary and the first piston chamber respectively The two piston chambers are connected, and the pilot valve can control the valve core to move left and right in the valve body; the first side wall of the valve body is respectively provided with a first refrigerant connecting pipe and a refrigerant connecting pipe I corresponding to the number of the third working medium interface, the valve body The second side wall is respectively provided with a third refrigerant connecting pipe, a fourth refrigerant connecting pipe and a refrigerant connecting pipe II corresponding to the number of the fourth working medium interfaces, and the first refrigerant connecting pipe is connected with the high pressure exhaust pipe of the compressor, and the third The refrigerant connection is connected to the second working medium interface, and the third working medium interface is respectively connected with the refrigerant connection pipe I, the first working medium interface is connected with the fourth refrigerant medium, and the first working medium interface is also connected with the expansion valve; Four working medium interfaces and refrigerant The tube II is connected one-to-one; the first side and the second channel are respectively opened on the two sides of the valve core, and the third end of the valve core is opened in the radial direction through the outer surface of the valve core at a position of one end of the valve core When the spool moves to the first piston chamber end, the first refrigerant connecting tube and the third refrigerant connecting tube are electrically connected through the third passage, and the refrigerant connecting tubes I are not electrically connected to each other, and the fourth refrigerant connecting tube and the refrigerant connecting tube II are not guided to each other. When the spool moves to the second piston chamber end, the first refrigerant connecting tube and the refrigerant connecting tube I are electrically connected through the first passage, and the third refrigerant connecting tube, the refrigerant connecting tube II and the fourth refrigerant connecting tube are electrically connected through the second passage.

According to a further technical solution of the present invention, the high-speed water inlet nozzle has a funnel V shape, and the high-speed water inlet nozzle and the inner wall of the water storage tank have an angle α, and α is 20 to 45°.

The casing type heat pump with the working medium of the present invention has the following advantages:

1. The condensing heat exchanger of the casing type heat pump of the working medium of the present invention is different from the conventional condensing heat exchanger, and the present invention rationally designs the structure of the heat pump reversing valve and the self-circulating casing heat exchanger, and Ingeniously connecting the two to the other components of the heat pump, so that the heat pump reversing valve can change the flow direction of the refrigerant according to the change of the direction of the heated water flow, according to "the first and second laws of thermodynamics", "the principle of Carnot", "heat The principle of floating water on the water and the flow direction of the refrigerant always follow the characteristics opposite to the flow direction of the water. It is possible to realize the self-circulating heat transfer of water without arranging the auxiliary pump of energy consumption, which simplifies the structure of the condensing heat exchanger. Increasing the working speed and efficiency of the heat pump, increasing the speed and efficiency, the volume of the required water tank will be correspondingly reduced, and the water tank can be made of a cheaper and longer-lasting material, with simple process, random shape, convenient maintenance, and economical and practical.

2. The refrigerant of the present invention exchanges heat with water in a more efficient self-circulating casing heat exchanger, and the manner of water inlet and heating determines the frequent alternating cold and heat of the refrigerant and water in the heating casing, which is beneficial for reducing compression. Machine fatigue, effectively reduce the decomposition of the compressor lubricant and the aging of the compressor, because the thermal expansion coefficient of the scale is significantly different from the copper of the tube process, the scale will loosen and fall off with the alternating heat of the heating process casing, and The water inlet is flushed and lifted to clean self-cleaning; and the high-speed water inlet nozzle of the invention has a funnel V shape and has a certain angle with the inner wall of the water storage tank, and when the water is injected, a gradually rising vortex water flow is formed in the water storage tank, due to entering The water in the water storage tank is heated when passing through the heat exchange casing, which can effectively overcome the problem that the low temperature water and the high temperature water are mixed to cause the water to be cold and hot, thereby improving the comfort, and the vortex high speed water spray is beneficial to the water storage tank. Self-cleaning reduces the scale deposits in the reservoir and the resulting maintenance.

DRAWINGS

The accompanying drawings, which are incorporated in the claims of the claims In the drawing:

Figure 1 is a schematic diagram of the connection of the first embodiment of the present invention (the working condition when cold water enters);

Figure 2: Schematic diagram of the reversing main valve and pilot valve in the working condition shown in Figure 1;

Figure 3 is a schematic diagram of the connection of the first embodiment of the present invention (conditions during self-circulating heat transfer);

Figure 4: Schematic diagram of the reversing main valve and pilot valve under the working condition shown in Figure 3;

Figure 5 is a schematic diagram of the connection of the second embodiment of the present invention (the working condition when cold water enters);

Figure 6 is a schematic view showing the structure of the reversing main valve and the pilot valve in the working condition shown in Figure 5;

Figure 7 is a schematic diagram of the connection of the second embodiment of the present invention (conditions during self-circulating heat transfer);

Figure 8 is a schematic view showing the structure of the reversing main valve and the pilot valve in the working condition shown in Figure 7;

Figure 9 is a schematic diagram of the connection of the third embodiment of the present invention (the working condition when cold water enters);

Figure 10 is a schematic diagram of the connection of the third embodiment of the present invention (conditions during self-circulating heat transfer);

Figure 11 is a schematic view showing the structure of the reversing main valve and the pilot valve in the working condition shown in Figure 9;

Figure 12 is a schematic view showing the structure of the reversing main valve and the pilot valve in the working condition shown in Figure 10;

Figure 13 is a cross-sectional view of the main spool shown in Figure 12 at A-A;

Figure 14 is a schematic diagram of the connection of the fourth embodiment of the present invention (the working condition when cold water enters);

Figure 15 is a schematic view showing the structure of the reversing main valve and the pilot valve in the working condition shown in Figure 14;

Figure 16 is a schematic diagram of the connection of the fourth embodiment of the present invention (conditions during self-circulating heat exchange);

Figure 17 is a schematic view showing the structure of the reversing main valve and the pilot valve in the working condition shown in Figure 16.

Wherein, the above figures include the following reference numerals:

1. Compressor; 2. Evaporator; 3. Expansion valve; 4. Main valve; 41, first refrigerant connection; 42, refrigerant connection I; 43, second refrigerant connection; 44, valve body; Chamber; 46, valve core; 461, first passage; 462, second passage; 463, third passage; 464, fourth passage; 47, fourth refrigerant take-over; 48, refrigerant take-over II; 49, third refrigerant Take over; 410, second piston chamber; 5, heat exchange sleeve; 51, first-pass heat exchange sleeve; 511, first working medium interface; 512, water inlet; 52, final heat exchange sleeve; Second working medium interface; 522, low-end water interface; 53, intermediate-pass heat exchange sleeve; 54, shell side; 55, tube path; 56, tube-pass tee; 561, third interface I; 562, third interface II; 57, shell-side connecting pipe; 571, third working medium interface; 572, fourth working medium interface; 6, water storage tank; 61, upper end interface; 62, water outlet; 63, high-speed water inlet; Lower end interface; 71, water source pipe; 72, one-way check water valve; 73, electromagnetic water valve; 8, pilot valve; 81, spring; 82, electromagnetic coil; 83, pilot valve body; 84, pilot valve spool 85, a first capillary; 86, a second capillary; 87, a third capillary; 88, a fourth capillary.

Here, the arrow K1 in the drawing indicates the flow direction of the refrigerant working medium, and the arrow K2 indicates the flow direction of the water.

Detailed ways

Embodiment 1:

As shown in FIG. 1 to FIG. 4, a casing type heat pump with a working medium changer includes a compressor 1, a heat pump reversing valve, a self-circulating sleeve type heat exchanger, an expansion valve 3, an evaporator 2, and a storage device. a water tank 6, the self-circulating sleeve heat exchanger comprises a one-way heat exchange sleeve 5, and the heat exchange sleeve 5 comprises a tube section 55 and a shell side 54 wrapped around the tube section 55; the compressor 1 The heat pump reversing valve, the shell side 54 of the heat exchange sleeve 5, the expansion valve 3, and the evaporator 2 are sequentially connected to form a working fluid circulation loop.

The upper end of the tube path 55 of the heat exchange sleeve 5 is provided with a water inlet 512. The water inlet 512 is connected to the water source tube 71 through a one-way check valve 72, and the water inlet 512 also passes through the electromagnetic water valve 73 and the water storage tank 6. The upper end interface 61 is connected; the lower end of the tube 55 of the heat exchange sleeve 5 is provided with a low-end water interface 522, and the low-end water interface 522 is connected with the high-speed water inlet 63 of the water storage tank 6; The upper working end of the process 54 is provided with a first working medium interface 511, the lower end of the shell side 54 of the heat exchange sleeve 5 is provided with a second working medium interface 521, and the first working medium interface 511 and the second working medium interface 521 are respectively combined with the heat pump Reversing valve connection.

As shown in FIGS. 2 and 4, the heat pump reversing valve includes a main valve 4 and a pilot valve 8 connected to the main valve 4 through a capillary.

The pilot valve 8 includes a pilot valve body 83, a pilot valve spool 84, a spring 81 and an electromagnetic coil 82. The electromagnetic coil 82 is connected to the controller circuit, and the pilot valve body 83 is connected with a first capillary 85 and a second capillary 86. a third capillary tube 87 and a fourth capillary tube 88, the first capillary tube 85 is in communication with the first refrigerant connection tube 41, and the third capillary tube 87 is in communication with the low pressure end line before the intake port of the compressor 1, and the pilot valve spool 84 is positioned at The pilot valve body 83 is connected to the telescopic rod and the spring 81 of the electromagnetic coil 82. When the electromagnetic coil 82 is energized, the first capillary 85 and the second capillary 86 are electrically connected, and the third capillary 87 and the fourth capillary 88 are electrically connected. When the coil 82 is de-energized, the first capillary 85 and the fourth capillary 88 are electrically connected, and the second capillary 86 is electrically connected to the third capillary 87.

The main valve 4 includes a valve body 44 and a valve core 46 wrapped in the valve body 44. The valve body 44 defines a valve chamber, and the valve body 44 has a first side wall and a second side wall disposed opposite to the valve chamber. The first end of the valve body 46 and the inner wall of the valve body 44 respectively define a first piston chamber 45 and a second piston chamber 410, and the second capillary tube 86 and the fourth capillary tube 88 of the pilot valve 8 respectively and the first piston chamber 45 The second piston chamber 410 is connected, and the pilot valve 8 controls the valve core 46 to move left and right in the valve body 44. The first side wall of the valve body 44 is provided with a first refrigerant connecting pipe 41, and the valve body 44 is A second refrigerant connecting pipe 43, a third refrigerant connecting pipe 49 and a fourth refrigerant connecting pipe 47 are respectively disposed on the two side walls, and the first refrigerant connecting pipe 41 is in communication with the high pressure exhaust pipe of the compressor 1, and the second refrigerant connecting pipe 43 is connected. Communicating with the first working fluid interface 511, the third refrigerant connecting pipe 49 is in communication with the second working fluid interface 521, and the fourth refrigerant connecting pipe 47 is in communication with the expansion valve 3; the valve core 46 is an arched valve core. When the spool 46 moves to the end of the first piston chamber 45, the first refrigerant connection 41 and the third refrigerant connection 49 are electrically connected, and the fourth refrigerant connection 47 and the second Take over the media 43 is turned on; when the spool 46 is moved to the end of the second piston chamber 410, a first refrigerant and the second refrigerant takeover took 41 turned 43, and the fourth refrigerant 47 and the third refrigerant takeover took 49 is turned on.

The working principle of the two working conditions of this embodiment is as follows:

1. Working condition when cold water enters: As shown in Fig. 1 and Fig. 2, when cold water enters the heat exchange sleeve 5 from the water source tube 71, the electromagnetic water valve 73 is closed, and the cold water flows in from the upper end of the tube 55, and at the same time, The compressor 1 is started, the electromagnetic coil 82 of the pilot valve 8 is in a de-energized state, the pilot valve spool 84 is ejected under the elastic force of the spring 81, the first capillary 85 and the fourth capillary 88 are turned on, and the high-pressure refrigerant will be the spool. 46 is pushed to one end of the first piston chamber 45, the first refrigerant connecting pipe 41 and the third refrigerant connecting pipe 49 are turned on, the fourth refrigerant connecting pipe 47 and the second refrigerant connecting pipe 43 are turned on, and the high temperature and high pressure flowing out from the exhaust port of the compressor 1 The refrigerant passes through the first refrigerant connecting pipe 41 of the main valve 4, the third refrigerant connecting pipe 49, and the second working medium port 521 at the lower end of the shell portion 54 into the refrigerant passage of the shell portion 54, and then the first working medium interface 511 of the upper end of the shell portion 54. Flowing out, and then passing through the second refrigerant connecting pipe 43, the fourth refrigerant connecting pipe 47, the expansion valve 3, and the evaporator 2, and then returning to the intake port of the compressor 1; the high-temperature refrigerant and the cold water are exchanged in the heat exchange casing, and the water is heated. After that, it flows out from the low-end water port 522 of the pipe 55 and flows in through the high-speed water inlet 63. 6 the tank outlet 62 and then flows out from the heat pump.

Second, the working condition of the self-circulating heat exchange: As shown in FIG. 3 and FIG. 4, when the water source pipe 71 has no water injected into the heat exchange sleeve 5, the electromagnetic water valve 73 is opened, and the electromagnetic coil 82 of the pilot valve 8 is energized. The pilot valve spool 84 is contracted against the spring force of the spring 81 under the suction of the electromagnetic coil 82. The first capillary 85 is electrically connected to the second capillary 86, and the high-pressure refrigerant pushes the spool 46 toward the end of the second piston chamber 410. A refrigerant connecting pipe 41 and the second refrigerant connecting pipe 43 are electrically connected, and the fourth refrigerant connecting pipe 47 and the third refrigerant connecting pipe 49 are electrically connected, and the high-temperature high-pressure refrigerant flowing out from the exhaust port of the compressor 1 passes through the first refrigerant connecting pipe 41 of the main valve 4. The second refrigerant connection 43 and the first working medium interface 511 at the upper end of the shell portion 54 enter the shell passage 54 refrigerant passage, and then flow out from the second working medium interface 521 at the lower end of the shell portion 54, and then pass through the third refrigerant connection tube 49, The fourth refrigerant pipe 47, the expansion valve 3, and the evaporator 2 are returned to the intake port of the compressor 1. At the same time, the high-temperature refrigerant heats the water in the pipe process, and the water rises and rises, and passes through the opened electromagnetic water valve 73. The upper end port 61 of the water tank 6 enters the water storage tank 6 while the water storage tank 6 The low temperature water sink, and then enters the recycle heat exchanger 55 is formed in the tube 63 by the high water nozzle.

Embodiment 2:

As shown in FIG. 5 to FIG. 8 , a casing type heat pump with a working medium change direction includes a compressor 1, a heat pump reversing valve, a self-circulating sleeve type heat exchanger, an expansion valve 3, an evaporator 2, and a water storage tank. 6; the compressor 1, the heat pump reversing valve, the self-circulating sleeve type heat exchanger, the expansion valve 3, and the evaporator 2 are sequentially connected to form a working fluid circulation loop; the upper end of the water storage tank 6 is provided with an upper end interface 61, The bottom of the water storage tank 6 is provided with a high speed water inlet 63 and a lower end interface 64, respectively.

The self-circulating sleeve type heat exchanger of this embodiment comprises two heat exchanger sleeves 5 arranged side by side, which are a first-pass heat exchange sleeve 51 and a final-pass heat exchange sleeve 52, respectively, a first-pass heat exchange sleeve 51 and a final The process heat exchange sleeves 52 are identical in construction and include a tube section 55 and a shell side 54 wrapped around the tube section 55.

The upper end of the tube path 55 of the first-pass heat exchange sleeve 51 and the last-end heat exchange sleeve 52 communicates through the tube-passing tee 56 to form a sealed water passage, and the third port I561 of the tube-passing tee 56 passes through the electromagnetic water valve. 73 is connected to the upper end interface 61 of the water storage tank 6; the lower end of the tube path 55 of the first-pass heat exchange sleeve 51 is provided with a water inlet 512, and the water inlet 512 is connected to the water source tube 71 through the one-way check water valve 72, and The water inlet 512 is also connected to the lower end interface 64 of the water storage tank 6 through the one-way check valve 72; the lower end of the tube 55 of the final heat exchange sleeve 52 is provided with a low-end water interface 522 and a low-end water interface 522. It communicates with the high speed water inlet 63 at the bottom of the water storage tank 6.

The upper end of the shell side 54 of the first-pass heat exchange sleeve 51 and the last-end heat exchange sleeve 52 communicates through the shell-side connecting tube 57 to form a sealed refrigerant passage, the first-pass heat exchange sleeve 51 and the last-pass heat exchange sleeve. The lower end of the shell portion 54 of the 52 is respectively provided with a first working medium interface 511 and a second working medium interface 521, and the shell-side connecting tube 57 is further provided with a third working medium interface 571, the first working medium interface 511, the second working The mass interface 521 and the third working fluid interface 571 are in communication with the heat pump reversing valve, respectively.

As shown in FIGS. 6 and 8, the heat pump reversing valve includes a main valve 4 and a pilot valve 8 connected to the main valve 4 through a capillary.

The main valve 4 includes a valve body 44 and a valve core 46 wrapped in the valve body 44. The valve body 44 defines a valve chamber, and the valve body 44 has a first side wall and a second side wall disposed opposite to the valve chamber. The first end of the valve body 46 and the inner wall of the valve body 44 respectively define a first piston chamber 45 and a second piston chamber 410, and the second capillary tube 86 and the fourth capillary tube 88 of the pilot valve 8 respectively and the first piston chamber 45 The second piston chamber 410 is connected, and the pilot valve 8 controls the valve core 46 to move left and right in the valve body 44; the first side wall of the valve body 44 is respectively provided with a first refrigerant connecting pipe 41 and a second refrigerant connecting pipe 43, a valve The second side wall of the body 44 is respectively provided with a third refrigerant connecting pipe 49 and a fourth refrigerant connecting pipe 47. The first refrigerant connecting pipe 41 is in communication with the high pressure exhaust pipe of the compressor 1, and the second refrigerant connecting pipe 43 and the third The working fluid interface 571 is in communication, the third refrigerant connecting pipe 49 is in communication with the second working fluid interface 521, and the fourth refrigerant connecting pipe 47 is in communication with the first working fluid interface 511 and the expansion valve 3; There is a first passage 461 and a second passage 462, and the valve core 46 is radially opened at a position of one end portion thereof through the outer surface of the valve core 46. The third passage 463, when the spool 46 moves to the end of the first piston chamber 45, the first refrigerant connection 41 and the third refrigerant connection 49 are electrically conducted through the third passage 463, and the second refrigerant connection 43 and the fourth refrigerant connection When the spool 46 is moved to the end of the second piston chamber 410, the first refrigerant connecting pipe 41 and the second refrigerant connecting pipe 43 are electrically conducted through the first passage 461, and the third refrigerant connecting pipe 49 and the fourth refrigerant connecting pipe 47 are passed. The second channel 462 is turned on.

1. Working condition when cold water enters: As shown in Fig. 5 and Fig. 6, when cold water enters the heat exchange sleeve 5 from the water source tube 71, the electromagnetic water valve 73 is closed, and the cold water is closed by the tube of the first-pass heat exchange sleeve 51. The water inlet 512 at the lower end of the process 55 enters the water passage. At the same time, the compressor 1 starts to work, the electromagnetic coil 82 of the pilot valve 8 is in a power-off state, and the pilot valve spool 84 is ejected under the elastic force of the spring 81. The first capillary 85 The fourth capillary tube 88 is electrically connected, and the high-pressure refrigerant pushes the valve core 46 toward one end of the first piston chamber 45, and the first refrigerant connecting tube 41 and the third refrigerant connecting tube 49 are turned on, and the high temperature and high pressure flowing out from the exhaust port of the compressor 1 are discharged. The refrigerant passes through the first refrigerant connection 41 of the main valve 4, the third refrigerant connection 49, and the second working medium interface 521 at the lower end of the shell side 54 of the final heat exchange sleeve 52 into the shell passage 54 refrigerant passage, and then is replaced by the first pass. The first working medium interface 511 at the lower end of the shell side 54 of the thermowell 51 flows out, and then passes through the expansion valve 3 and the evaporator 2, and then returns to the inlet of the compressor 1; the high temperature refrigerant and the cold water conduct heat in the heat exchange sleeve. After exchange, the water is heated and flows out of the low-end water port 522 of the tube path 55 of the final heat exchange sleeve 52. It flows into the storage tank 6 through a high-speed water feed mouth 63 and then flows out the outlet 62 of the heat pump.

Second, the working condition of the self-circulating heat exchange: As shown in FIG. 7 and FIG. 8, when the water source pipe 71 has no water injected into the heat exchange sleeve 5, the electromagnetic water valve 73 is opened, and the electromagnetic coil 82 of the pilot valve 8 is energized. The pilot valve spool 84 is contracted against the spring force of the spring 81 under the suction of the electromagnetic coil 82. The first capillary 85 is electrically connected to the second capillary 86, and the high pressure refrigerant pushes the spool 46 toward the end of the second piston chamber 410. When the first refrigerant connecting pipe 41 and the second refrigerant connecting pipe 43 are turned on, the fourth refrigerant connecting pipe 47 and the third refrigerant connecting pipe 49 are turned on; the high temperature and high pressure refrigerant flowing out from the exhaust port of the compressor 1 is sequentially passed through the first refrigerant of the main valve 4. After the nozzle 41 and the second refrigerant connection pipe 43 are flowed into the shell portion 54 from the third working fluid interface 571, the first branch stream passes through the first working medium interface 511 of the first-pass heat exchange sleeve 51, and the second branch stream passes the final heat exchange. The second working fluid interface 521 of the casing 52 passes through the third refrigerant connecting pipe 49 and the fourth refrigerant connecting pipe 47 in turn, and then the two branches merge and flow through the expansion valve 3, and the evaporator 2 returns to the intake port of the compressor 1. At the same time, the high temperature The refrigerant will heat the first pass heat transfer sleeve 51 and the last pass heat transfer sleeve 52. The water is heated up and floated, and after passing through the opened electromagnetic water valve 73, the upper end port 61 of the water storage tank 6 enters the water storage tank 6, and at the same time, the low temperature water in the water storage tank 6 sinks, and then respectively by the high speed water inlet 63 or The lower end interface 64 enters the tube section 55 to form a cyclic heat exchange.

Embodiment 3:

As shown in FIG. 9 to FIG. 13 , a casing type heat pump with a working medium orientation includes a compressor 1, a heat pump reversing valve, a self-circulating sleeve type heat exchanger, an expansion valve 3, an evaporator 2, and a water storage tank. 6; the compressor 1, the heat pump reversing valve, the self-circulating sleeve type heat exchanger, the expansion valve 3, and the evaporator 2 are sequentially connected to form a working fluid circulation loop; the upper end of the water storage tank 6 is provided with an upper end interface 61, The bottom of the water storage tank 6 is provided with a high speed water inlet 63 and a lower end interface 64, respectively.

The self-circulating sleeve heat exchanger comprises a heat exchange sleeve 5 arranged in parallel with N steps, and the value of N is an odd number greater than 2, including a first-pass heat exchange sleeve 51, a final-pass heat exchange sleeve 52 and a plurality of intermediate portions. The heat exchange sleeve 53 and the first heat exchange sleeve 51, the last heat transfer sleeve 52 and the intermediate heat exchange sleeve 53 have the same structure, and both include a tube 55 and a shell portion 54 wrapped around the tube 55. .

The tube path 55 of the first pass heat exchange sleeve 51, the intermediate heat exchange sleeve 53 and the end heat exchange sleeve 52 are sequentially connected in series through the tube pass tee 56 to form a sealed water passage; the first stage of the high temperature tube tee 56 The three interfaces I561 are respectively connected to the upper end interface 61 of the water storage tank 6 through the electromagnetic water valve 73, and the third interface II562 of the low-end tube-passing tee 56 is respectively connected to the lower end of the water storage tank 6 through the one-way check water valve 72. 64 is connected; the upper end of the tube path 55 of the first-pass heat exchange sleeve 51 is provided with a water inlet 512. The water inlet 512 communicates with the water source tube 71 through the one-way check valve 72, and the water inlet 512 also passes electromagnetic water. The valve 73 is in communication with the upper end port 61 of the water storage tank 6; the lower end of the tube path 55 of the final heat exchange sleeve 52 is provided with a low end water port 522, and the low end water port 522 is connected to the high speed water inlet 63 of the water storage tank 6. .

The shell path 54 of the first-pass heat exchange sleeve 51, the intermediate-pass heat exchange sleeve 53 and the final-pass heat exchange sleeve 52 are sequentially connected in series through the shell-side connecting tube 57 to form a sealed refrigerant passage, and the first-pass heat exchange sleeve 51 A first working medium interface 511 is disposed at an upper end of the shell portion 54, a second working medium interface 521 is disposed at a lower end of the shell side 54 of the end heat exchange sleeve 52, and a third working medium interface 571 is disposed at the high end shell connecting tube 57. The low-end shell-side connecting pipe 57 is provided with a fourth working medium interface 572, and the first working medium interface 511, the second working medium interface 521, the third working medium interface 571 and the fourth working medium interface 572 are respectively Connected to the heat pump reversing valve.

As shown in FIGS. 11 to 13, the heat pump reversing valve includes a main valve 4 and a pilot valve 8 connected to the main valve 4 through a capillary.

The main valve 4 includes a valve body 44 and a valve core 46 wrapped in the valve body 44. The valve body 44 defines a valve chamber, and the valve body 44 has a first side wall and a second side wall disposed opposite to the valve chamber. The first end of the valve body 46 and the inner wall of the valve body 44 respectively define a first piston chamber 45 and a second piston chamber 410, and the second capillary tube 86 and the fourth capillary tube 88 of the pilot valve 8 respectively and the first piston chamber 45 The second piston chamber 410 is connected, and the pilot valve 8 controls the valve core 46 to move left and right in the valve body 44. The first side wall of the valve body 44 is respectively provided with a first refrigerant connecting pipe 41, a second refrigerant connecting pipe 43 and a refrigerant connection pipe I42 corresponding to the number of the third working medium ports 571, and a third refrigerant pipe connection 49, a fourth refrigerant connection pipe 47, and a refrigerant connection pipe corresponding to the number of the fourth working medium ports 572 are respectively disposed on the second side wall of the valve body 44. II48; the first refrigerant connecting pipe 41 is in communication with the high pressure exhaust pipe of the compressor 1, the second refrigerant connecting pipe 43 is in communication with the first working fluid interface 511, and the third refrigerant connecting pipe 49 is in communication with the second working fluid interface 521, and the fourth The refrigerant connection pipe 47 is connected to the expansion valve 3, and the third working fluid interface 571 is connected to the refrigerant connection pipe I42 one-to-one. The four working fluid interfaces 572 are respectively connected to the refrigerant connecting tube II48 one-to-one; the two sides of the valve core 46 are respectively provided with a first passage 461 and a second passage 462 in the axial direction, and the position of the valve core 46 at one end thereof is along the diameter A third passage 463 is formed through the outer surface of the valve core 46. The circumferential outer surface of the valve core 46 is provided with a recessed fourth passage 464. When the spool 46 is moved to the end of the first piston chamber 45, the first refrigerant connection 41 The third refrigerant passage 49 is electrically connected to the third passage 463, the second refrigerant connection 43 and the fourth refrigerant connection 47 are electrically connected through the fourth passage 464, and the refrigerant connection I42 is not electrically connected to each other, and the refrigerant connection tube II48 is not electrically connected to each other; When the spool 46 moves to the end of the second piston chamber 410, the first refrigerant connecting pipe 41, the second refrigerant connecting pipe 43, and the refrigerant connecting pipe I42 are electrically conducted through the first passage 461, and the third refrigerant connecting pipe 49 and the fourth refrigerant connecting pipe 47 are provided. And the refrigerant take-over II48 is turned on through the second passage 462.

1. Working condition when cold water is injected: As shown in Fig. 9 and Fig. 11, when cold water enters the heat exchange sleeve 5 from the water source tube 71, the electromagnetic water valve 73 is closed, and the cold water is closed by the tube of the first-pass heat exchange sleeve 51. The water inlet 512 at the upper end of the process 55 enters the water passage. At the same time, the compressor 1 starts to work, the electromagnetic coil 82 of the pilot valve 8 is in a power-off state, and the pilot valve spool 84 is ejected under the elastic force of the spring 81. The first capillary 85 The fourth capillary tube 88 is electrically connected, and the high-pressure refrigerant pushes the valve core 46 toward one end of the first piston chamber 45. At this time, the first refrigerant connecting pipe 41 and the third refrigerant connecting pipe 49 are electrically connected, and the second refrigerant connecting pipe 43 and the fourth refrigerant medium are connected. The connecting pipe 47 is turned on, and the high temperature and high pressure refrigerant flowing out from the exhaust port of the compressor 1 passes through the first refrigerant connecting pipe 41 of the main valve 4, the third refrigerant connecting pipe 49, and the second working of the lower end of the shell side 54 of the final heat exchange bushing 52. The mass interface 521 enters the refrigerant passage, and then flows out from the first working medium port 511 at the upper end of the shell side 54 of the first-pass heat exchange sleeve 51, and then passes through the second refrigerant connecting pipe 43 and the fourth refrigerant connecting pipe 47 of the main valve 4 in sequence. The expansion valve 3 and the evaporator 2 are returned to the intake port of the compressor 1; the high-temperature refrigerant and the cold water are in the heat exchange sleeve The heat exchange in the tube, after the water is heated, flows out from the low-end water port 522 of the tube path 55 of the final-pass heat exchange sleeve 52, flows into the water storage tank 6 through the high-speed water inlet nozzle 63, and flows out of the heat pump through the water outlet 62.

Second, the working condition of the self-circulating heat exchange: As shown in FIG. 10 and FIG. 12, when the water source pipe 71 has no water injected into the heat exchange sleeve 5, the electromagnetic water valve 73 is opened, and the electromagnetic coil 82 of the pilot valve 8 is energized. The pilot valve spool 84 is contracted against the spring force of the spring 81 under the suction of the electromagnetic coil 82. The first capillary 85 is electrically connected to the second capillary 86, and the high pressure refrigerant pushes the spool 46 toward the end of the second piston chamber 410. When the first refrigerant connecting pipe 41, the refrigerant connecting pipe I42 and the second refrigerant connecting pipe 43 are turned on, the third refrigerant connecting pipe 49, the refrigerant connecting pipe II48 and the fourth refrigerant connecting pipe 47 are turned on; the high temperature and high pressure refrigerant flowing out from the exhaust port of the compressor 1 is composed of The first refrigerant connecting pipe 41 of the main valve 4 flows into the main valve 4, and then flows into the shell passage 54 refrigerant passage through the third working fluid interface 571 through the refrigerant connecting pipe I42, and also passes through the first working medium interface 511 from the second refrigerant connecting pipe 43. Flowing into the shell side 54 of the first-pass heat exchange sleeve 51, then the refrigerant in the shell side 54 is respectively flown from the fourth working fluid interface 572 through the refrigerant connection tube II48 into the main valve 4, and also from the second working medium interface 521 through the third The refrigerant connection pipe 49 flows into the main valve 4, and is then connected from the fourth refrigerant of the main valve 4. The tube 47 flows out through the expansion valve 3 and the evaporator 2 to return to the inlet of the compressor 1. At the same time, the high temperature refrigerant heats the first-pass heat exchange sleeve 51, the intermediate-pass heat exchange sleeve 53 and the final heat exchange sleeve 52. The water in the pipe, the water rises and rises, passes through the opened electromagnetic water valve 73, and enters the water storage tank 6 from the upper end port 61 of the water storage tank 6, and at the same time, the low temperature water in the water storage tank 6 sinks, and then respectively by the high speed The inlet nozzle 63 or the lower end port 64 enters the tube section 55 to form a cyclic heat exchange.

Embodiment 4:

As shown in FIG. 14 to FIG. 17, a casing type heat pump with a working fluid direction includes a compressor 1, a heat pump reversing valve, a self-circulating sleeve type heat exchanger, an expansion valve 3, an evaporator 2, and a water storage tank. 6; the compressor 1, the heat pump reversing valve, the self-circulating sleeve type heat exchanger, the expansion valve 3, and the evaporator 2 are sequentially connected to form a working fluid circulation loop; the upper end of the water storage tank 6 is provided with an upper end interface 61, The bottom of the water storage tank 6 is provided with a high speed water inlet 63 and a lower end interface 64, respectively.

The self-circulating sleeve heat exchanger comprises a heat exchange sleeve 5 arranged in parallel with N steps, and N takes an even number greater than 2, including a first-pass heat exchange sleeve 51, a final heat exchange sleeve 52 and a plurality of intermediate tubes The heat exchange sleeve 53 and the first heat exchange sleeve 51, the last heat transfer sleeve 52 and the intermediate heat exchange sleeve 53 have the same structure, and both include a tube 55 and a shell portion 54 wrapped around the tube 55. .

The tube path 55 of the first pass heat exchange sleeve 51, the intermediate heat exchange sleeve 53 and the end heat exchange sleeve 52 are sequentially connected in series through the tube pass tee 56 to form a sealed water passage; the first stage of the high temperature tube tee 56 The three interfaces I561 are respectively connected to the upper end interface 61 of the water storage tank 6 through the electromagnetic water valve 73, and the third interface II562 of the low-end tube-passing tee 56 is respectively connected to the lower end of the water storage tank 6 through the one-way check water valve 72. 64. The lower end of the tube path 55 of the first-pass heat exchange sleeve 51 is provided with a water inlet 512. The water inlet 512 is connected to the water source tube 71 through a one-way check valve 72, and the water inlet 512 is also unidirectional. The check valve 72 is in communication with the lower end port 64 of the water storage tank 6; the lower end of the tube path 55 of the final heat exchange sleeve 52 is provided with a low end water port 522, the low end water port 522 and the high speed of the water storage tank 6. The water inlet 63 is in communication.

The shell-side 54 of the first-pass heat exchange sleeve 51, the intermediate-pass heat exchange sleeve 53 and the final-pass heat exchange sleeve 52 are sequentially connected in series through the shell-side connecting tube 57 to form a sealed refrigerant passage; the first-pass heat exchange sleeve 51 The lower working end of the shell portion 54 is provided with a first working medium interface 511, the lower end of the shell portion 54 of the last-end heat transfer sleeve 52 is provided with a second working medium interface 521, and the high-end shell-side connecting tube 57 is provided with a third working medium interface 571. The low-end shell-side connecting pipe 57 is provided with a fourth working medium interface 572, and the first working medium interface 511, the second working medium interface 521, the third working medium interface 571 and the fourth working medium interface 572 are respectively Connected to the heat pump reversing valve.

As shown in FIGS. 14 to 17, the heat pump reversing valve includes a main valve 4 and a pilot valve 8 connected to the main valve 4 through a capillary.

The main valve 4 includes a valve body 44 and a valve core 46 wrapped in the valve body 44. The valve body 44 defines a valve chamber, and the valve body 44 has a first side wall and a second side wall disposed opposite to the valve chamber. The first end of the valve body 46 and the inner wall of the valve body 44 respectively define a first piston chamber 45 and a second piston chamber 410, and the second capillary tube 86 and the fourth capillary tube 88 of the pilot valve 8 respectively and the first piston chamber 45 The second piston chamber 410 is connected, and the pilot valve 8 controls the spool 46 to move left and right in the valve body 44. The first side wall of the valve body 44 is respectively provided with a first refrigerant connecting pipe 41 and an interface with the third working medium. 571 the corresponding refrigerant connection I42, the second side wall of the valve body 44 is respectively provided with a third refrigerant connection 49, a fourth refrigerant connection 47 and a refrigerant connection tube II48 corresponding to the number of the fourth working medium 572, the first The refrigerant connection 41 is in communication with the high pressure exhaust pipe of the compressor 1, the third refrigerant connection 49 is in communication with the second working fluid interface 521, and the third working fluid interface 571 is in one-to-one communication with the refrigerant connection I42. The first working medium interface 511 Connected with the fourth refrigerant connecting pipe 47, and the first working medium interface 511 is also connected to the expansion valve 3; the fourth working medium is connected 572 is respectively connected to the refrigerant connecting tube II48 one-to-one; the first side of the valve core 46 is axially opened with a first passage 461 and a second passage 462, and the position of the valve core 46 is open in the radial direction. The third passage 463 of the outer surface of the valve core 46, when the spool 46 moves to the end of the first piston chamber 45, the first refrigerant connecting pipe 41 and the third refrigerant connecting pipe 49 are electrically connected through the third passage 463, and the refrigerant connecting pipe I42 is mutually The fourth refrigerant connection 47 and the refrigerant connection tube II48 are not electrically connected to each other; when the valve core 46 is moved to the second piston chamber 410 end, the first refrigerant connection tube 41 and the refrigerant connection tube I42 are electrically connected through the first passage 461. The third refrigerant connection pipe 49, the refrigerant connection pipe II48, and the fourth refrigerant medium connection pipe 47 are electrically connected through the second passage 462.

1. Working condition when cold water enters: As shown in Fig. 14 and Fig. 15, when cold water enters the heat exchange sleeve 5 from the water source tube 71, the electromagnetic water valve 73 is closed, and the cold water is closed by the first-pass heat exchange sleeve 51. The water inlet 512 at the lower end of the tube 55 enters the water circulation passage. At the same time, the compressor 1 starts to work, the electromagnetic coil 82 of the pilot valve 8 is in a power-off state, and the pilot valve spool 84 is ejected under the elastic force of the spring 81, and the first capillary 85 is electrically connected to the fourth capillary 88, and the high-pressure refrigerant pushes the valve core 46 toward one end of the first piston chamber 45, and the first refrigerant connecting pipe 41 and the third refrigerant connecting pipe 49 are turned on, and the high temperature flowing out of the exhaust port of the compressor 1 The high-pressure refrigerant enters the refrigerant passage of the shell-side 54 through the first refrigerant connection 41 of the main valve 4, the third refrigerant connection 49, and the second working medium interface 521 at the lower end of the shell-side 54 of the final-pass heat exchange sleeve 52, and then the first pass The first working medium interface 511 at the lower end of the shell side 54 of the heat exchange sleeve 51 flows out, and then passes through the expansion valve 3 and the evaporator 2, and then returns to the inlet of the compressor 1; the high temperature refrigerant and the cold water are exchanged in the heat exchange sleeve. After the heat is heated, the water flows out from the low-end water port 522 of the pipe path 55 of the final heat exchange sleeve 52. It flows into the storage tank 6 through a high-speed water feed mouth 63 and then flows out the outlet 62 of the heat pump.

2. Working condition during self-circulating heat exchange: As shown in FIG. 16 and FIG. 17, when the water source pipe 71 has no water injected into the heat exchange sleeve 5, the electromagnetic water valve 73 is opened, and at the same time, the electromagnetic coil 82 of the pilot valve 8 is at In the energized state, the pilot valve spool 84 is contracted against the spring force of the spring 81 under the suction of the electromagnetic coil 82, the first capillary 85 is electrically connected to the second capillary 86, and the high-pressure refrigerant pushes the spool 46 toward the end of the second piston chamber 410. The first refrigerant connecting pipe 41 and the refrigerant connecting pipe I42 are turned on, and the third refrigerant connecting pipe 49, the refrigerant connecting pipe II48, and the fourth refrigerant connecting pipe 47 are electrically connected to each other; and the high temperature and high pressure refrigerant flowing out from the exhaust port of the compressor 1 is the main valve 4 A refrigerant connecting pipe 41 flows into the main valve 4, and then flows into the shell passage 54 refrigerant passage through the third working medium port 571 via the refrigerant connecting pipe I42, and then the refrigerant in the shell portion 54 is mainly divided into three flow directions, and the first branch flow is respectively divided into three The four working medium interface 572 flows into the main valve 4 via the refrigerant connecting pipe II48, and the second branch flow flows into the main valve 4 through the third refrigerant connecting pipe 49 through the second working medium port 521, and then the first and second branch flows are merged from the main valve 4 Four refrigerant take-over 47 flows out and flows through the first working medium interface 511 The third tributary is merged, and then returned to the inlet of the compressor 1 through the expansion valve 3 and the evaporator 2 in sequence; at the same time, the high temperature refrigerant heats the first heat exchange sleeve 51, the intermediate heat exchange sleeve 53 and the end The water in the tube of the heat transfer sleeve 52 is heated and floated up, and after passing through the opened electromagnetic water valve 73, the upper end port 61 of the water storage tank 6 enters the water storage tank 6, and the low temperature water in the water storage tank 6 The sinking is further performed by the high speed water inlet 63 or the lower end interface 64 into the tube 55 to form a circulating heat exchange.

The sleeve type heat pump of the working medium of the present invention has the same water circulation principle as the solar water heater in the case of the self-circulating heat exchange in the first embodiment to the fourth embodiment, and utilizes the principle of hot water floating on the submerged sink and the generated thermosiphon. The effect is to achieve the purpose of circulating heating water, without the need to set up energy-consuming circulating water pump assistance, simplifying the structure of the heat pump water heater and reducing energy consumption.

The casing type heat pump of the working medium of the present invention has a condition in which the cold water enters in the first to fourth embodiments, and the heat exchange rate and efficiency are also remarkably improved according to the "Carnot principle".

In the casing type heat pump of the present invention, the flow direction of the water and the refrigerant medium is always reversed regardless of any of the working conditions of the first embodiment to the fourth embodiment, so that the heat exchange rate and efficiency can be effectively improved.

In addition, the high-speed water inlet nozzle 63 of the present invention has a funnel V shape, and the high-speed water inlet nozzle 63 and the inner wall of the water storage tank 6 have an angle α of 20 to 45°. In the present embodiment, the angle α is The value is 30°; since the high-speed water inlet nozzle 63 is designed as a funnel V shape, and it has a certain angle with the inner wall of the water storage tank 6, a gradual rising vortex water flow is formed in the water storage tank 6 when water is injected; When the water injected into the heat pump is heated by the heat exchange sleeve and then fully mixed with the high temperature water in the water storage tank 6, the problem of the water flowing out of the water outlet 62 can be effectively avoided; in addition, the high speed vortex water flow can also be washed away. The precipitating scale inside the water storage tank 6 is stirred and allowed to flow out of the heat pump with the water, which is beneficial to self-cleaning inside the water storage tank 6, and reduces the maintenance that is caused thereby.

In the first embodiment to the fourth embodiment, the structure and working principle of the pilot valve 8 are the same as those in the prior art, and will not be described in detail herein.

When the present invention is used in a special industry, when the heated working medium (i.e., the water in the above embodiment) is of high demand, high precision, and some mixed turbid liquid, the one-way check valve 72 can be replaced by an electromagnetic water valve. The action, effect, and flow direction of the heated working fluid are the same as those of the one-way check valve.

The above embodiments are merely preferred embodiments of the present invention, and the structures of the present invention are not limited to the forms listed in the above embodiments, and any modifications, equivalents, and the like made within the spirit and principles of the present invention should be included in the embodiments. Within the scope of protection of the present invention.

Claims

A casing type heat pump with variable working fluid, characterized in that it comprises a compressor (1), a heat pump reversing valve, a self-circulating sleeve type heat exchanger, an expansion valve (3), an evaporator (2) and a water storage device. Box (6), the self-circulating tube type heat exchanger comprises a heat transfer sleeve (5) arranged in parallel with N steps, the heat exchange sleeve (5) comprising a tube length (55) and wrapped in a tube path ( 55) outer shell side (54); the tube path (55) is sequentially connected in series through the tube-passing tee (56), and the third port I (561) of the high-end tube-passing tee (56) passes through the electromagnetic water valve ( 73) communicating with the upper end port (61) of the water storage tank (6), and the third port II (562) of the pipe end tee (56) at the lower end respectively passes through the one-way check valve (72) and the water storage tank The lower end interface (64) of (6) is connected; the tube path (55) of the heat transfer sleeve (5) in the first pass is provided with a water inlet (512), and the water inlet (512) passes through the one-way check water The valve (72) is in communication with the water source pipe (71), and the water inlet (512) is also in communication with the water storage tank (6); at the lower end of the pipe section (55) of the heat exchanger sleeve (5) of the last stage There is a low-end water port (522), and a low-end water port (522) is connected to the high-speed water inlet (63) at the lower end of the water storage tank (6); (54) sequentially connected in series through the shell-side connecting tube (57), and the shell side (54) of the first-stage heat exchange sleeve (5) is provided with a first working medium interface (511), which is in the last stage of heat exchange. a second working medium interface (521) is disposed at a lower end of the shell side (54) of the sleeve (5), and the first working medium interface (511) and the second working medium interface (521) are respectively connected to the heat pump reversing valve, The compressor (1), the heat pump reversing valve, the shell side (54) of the heat exchange sleeve (5), the expansion valve (3), and the evaporator (2) are sequentially connected to form a refrigerant working medium circulation loop.
The casing type heat pump according to claim 1, wherein the heat exchange sleeve (5) of the self-circulating sleeve type heat exchanger is a non-horizontal structure that is erected or has a certain inclination angle.
The sleeve type heat pump according to claim 1 or 2, wherein the number N of the heat exchange sleeves (5) is 1 and the tube of the heat exchange sleeve (5) (55) The upper water inlet (512) is connected to the water source pipe (71) through a one-way check valve (72), and the water inlet (512) also passes through the electromagnetic water valve (73) and the water storage tank (6). The upper end port (61) is connected, the low end water port (522) of the pipe line (55) is connected to the high speed water inlet nozzle (63) of the water storage tank (6); and the shell side of the heat exchange bushing (5) ( The first working fluid interface (511) and the second working fluid interface (521) of 54) are respectively connected to the heat pump reversing valve.
The sleeve-type heat pump according to claim 3, wherein the heat pump reversing valve comprises a main valve (4) and a pilot valve (8) connected to the main valve (4) through a capillary; The main valve (4) comprises a valve body (44) and a valve core (46) wrapped in the valve body (44), the valve body (44) defines a valve cavity, and the valve body (44) has a relative valve cavity setting The first side wall and the second side wall, the two ends of the valve core (46) and the inner wall of the valve body (44) respectively define a first piston chamber (45) and a second piston chamber (410), the pilot valve (8) being respectively connected to the first piston chamber (45) and the second piston chamber (410) through a capillary tube, and the pilot valve (8) can control the spool (46) to move left and right in the valve body (44); The first side wall of the valve body (44) is provided with a first refrigerant connecting pipe (41), and the second side wall of the valve body (44) is respectively provided with a second refrigerant connecting pipe (43) and a third refrigerant connecting pipe (49). And a fourth refrigerant connection (47), the first refrigerant connection (41) is in communication with the high pressure exhaust pipe of the compressor (1), and the second refrigerant connection (43) is connected to the first working medium (511) Connected, the third refrigerant connection (49) is in communication with the second working medium interface (521), the fourth The medium connection pipe (47) is in communication with the expansion valve (3); the valve core (46) is an arched valve core, and when the valve core (46) is moved to the first piston chamber (45) end, the first refrigerant connection pipe ( 41) being electrically connected to the third refrigerant connection (49), and the fourth refrigerant connection (47) is electrically connected to the second refrigerant connection (43); when the valve core (46) is moved to the second piston chamber (410) end The first refrigerant connection (41) is electrically connected to the second refrigerant connection (43), and the fourth refrigerant connection (47) is electrically connected to the third refrigerant connection (49).
The sleeve type heat pump according to claim 1 or 2, wherein the heat exchange sleeve (5) has a number N of 2, including a first-pass heat exchange sleeve (51) And the end-stage heat exchange sleeve (52), the upper end of the tube path (55) of the first-pass heat exchange sleeve (51) and the end-stage heat transfer sleeve (52) is connected through the tube-passing tee (56), the first pass The water inlet (512) at the lower end of the tube path (55) of the heat exchange sleeve (51) communicates with the water source tube (71) through the one-way check valve (72), and the water inlet (512) also passes through the one-way The check valve (72) communicates with the lower end port (64) of the water storage tank (6), and the low end water port (522) of the tube path (55) of the final heat exchange sleeve (52) and the water storage tank ( 6) The high-speed water inlet (63) at the bottom is connected, and the third port I (561) of the tube-passing tee (56) is connected to the upper end interface (61) of the water storage tank (6) through the electromagnetic water valve (73); The upper end of the shell side (54) of the first-pass heat exchange bushing (51) and the final-pass heat transfer bushing (52) is connected through the shell-side connecting pipe (57), and the first-pass heat exchange bushing (51) and the final process are changed. The lower end of the shell side (54) of the thermowell (52) is respectively provided with a first working medium interface (511) and a second working medium interface (521), and the shell connecting tube (57) is further provided with a third working medium interface ( 571 The first working medium interface (511), the second working medium interface (521), and the third working medium interface (571) are respectively in communication with the heat pump reversing valve.
The casing type heat pump according to claim 5, wherein the heat pump reversing valve comprises a main valve (4) and a pilot valve (8) connected to the main valve (4) through a capillary; The main valve (4) comprises a valve body (44) and a valve core (46) wrapped in the valve body (44), the valve body (44) defines a valve cavity, and the valve body (44) has a relative valve cavity setting The first side wall and the second side wall, the two ends of the valve core (46) and the inner wall of the valve body (44) respectively define a first piston chamber (45) and a second piston chamber (410), the pilot valve (8) being respectively connected to the first piston chamber (45) and the second piston chamber (410) through a capillary tube, and the pilot valve (8) can control the valve core (46) to move left and right in the valve body (44); The first side wall of the body (44) is respectively provided with a first refrigerant connecting pipe (41) and a second refrigerant connecting pipe (43), and the second side wall of the valve body (44) is respectively provided with a third refrigerant connecting pipe (49) and a fourth refrigerant connection (47), the first refrigerant connection (41) is in communication with a high pressure exhaust pipe of the compressor (1), and the second refrigerant connection (43) is in communication with a third working medium interface (571). The third refrigerant connection (49) is in communication with the second working medium interface (521), and the fourth refrigerant The tube (47) is in communication with the first working medium interface (511) and the expansion valve (3); the valve body (46) is provided with a first passage (461) and a second passage (462) on both sides, and the spool (46) a third passage (463) extending through the outer surface of the spool (46) in a radial direction at a position of one of the ends, when the spool (46) moves to the end of the first piston chamber (45), first The refrigerant connection (41) and the third refrigerant connection (49) are electrically conducted through the third passage (463), and the second refrigerant connection (43) and the fourth refrigerant connection (47) are blocked; when the spool (46) moves to the first At the end of the second piston chamber (410), the first refrigerant connection (41) and the second refrigerant connection (43) are electrically conducted through the first passage (461), and the third refrigerant connection (49) and the fourth refrigerant connection (47) ) is turned on through the second channel (462).
The casing type heat pump according to claim 1 or 2, wherein the number N of the heat exchange sleeves (5) is an odd number greater than 2, including the first-pass heat exchange sleeve (51), the intermediate-pass heat exchange sleeve (53) and the final-pass heat transfer sleeve (52), and the tube paths (55) of the heat transfer sleeves (5) are sequentially connected in series through the tube-passing tee (56), the first pass The water inlet (512) at the upper end of the tube path (55) of the heat exchange sleeve (51) communicates with the water source tube (71) through the one-way check valve (72), and the water inlet (512) also passes through the electromagnetic water valve ( 73) communicating with the upper end port (61) of the water storage tank (6); the low-end water port (522) of the pipe end (55) of the last-pass heat exchange bushing (52) and the high-speed inlet of the water storage tank (6) The water nozzle (63) is connected; the third interface I (561) of the high-end tube-passing tee (56) communicates with the upper end interface (61) of the water storage tank (6) through the electromagnetic water valve (73), respectively, at the low end The third interface II (562) of the tube-passing tee (56) communicates with the lower end interface (64) of the water storage tank (6) through a one-way check valve (72); each of the heat exchange sleeves (5) The shell side (54) is connected in series through the shell-side connecting tube (57), and the first working medium is connected to the upper end of the shell side (54) of the first-pass heat exchange sleeve (51). (511), a second working medium interface (521) is disposed at a lower end of the shell side (54) of the end heat exchange sleeve (52), and a third working medium interface (571) is disposed at the high end shell connecting tube (57). The lower-side shell-side connecting pipe (57) is provided with a fourth working medium interface (572), a first working medium interface (511), a second working medium interface (521), and a third working medium interface (571). And a fourth working fluid interface (572) is respectively connected to the heat pump reversing valve.
The casing type heat pump according to claim 7, wherein the heat pump reversing valve comprises a main valve (4) and a pilot valve (8) connected to the main valve (4) through a capillary; The main valve (4) comprises a valve body (44) and a valve core (46) wrapped in the valve body (44), the valve body (44) defines a valve cavity, and the valve body (44) has a relative valve cavity setting The first side wall and the second side wall, the two ends of the valve core (46) and the inner wall of the valve body (44) respectively define a first piston chamber (45) and a second piston chamber (410), the pilot valve (8) being respectively connected to the first piston chamber (45) and the second piston chamber (410) through a capillary tube, and the pilot valve (8) can control the valve core (46) to move left and right in the valve body (44); The first side wall of the body (44) is respectively provided with a first refrigerant connecting pipe (41), a second refrigerant connecting pipe (43) and a refrigerant connecting pipe I (42) corresponding to the number of the third working medium interface (571), and the valve body The second side wall of (44) is respectively provided with a third refrigerant connecting pipe (49), a fourth refrigerant connecting pipe (47) and a refrigerant connecting pipe II (48) corresponding to the number of the fourth working medium interfaces (572); a refrigerant connection (41) is connected to the high pressure exhaust pipe of the compressor (1), and the second refrigerant The tube (43) is in communication with the first working medium interface (511), the third refrigerant connecting tube (49) is in communication with the second working medium interface (521), and the fourth refrigerant connecting tube (47) is connected to the expansion valve (3), and the third The working medium interface (571) is in one-to-one communication with the refrigerant connection I (42), and the fourth working medium interface (572) is respectively connected to the refrigerant connection tube II (48) one-to-one; the two sides of the valve core (46) A first passage (461) and a second passage (462) are respectively opened in the axial direction, and the third end of the valve core (46) is radially opened at a position of one end portion thereof (463). The circumferential outer side surface of the spool (46) is provided with a recessed fourth passage (464); when the spool (46) is moved to the first piston chamber (45) end, the first refrigerant connection (41) and the third The refrigerant connection pipe (49) is turned on through the third passage (463), the second refrigerant connection pipe (43) and the fourth refrigerant medium connection pipe (47) are electrically connected through the fourth passage (464), and the refrigerant connection pipe I (42) is not guided to each other. Passing, the refrigerant connecting tubes II (48) are not electrically connected to each other; when the spool (46) is moved to the second piston chamber (410) end, the first refrigerant connecting tube (41), the second refrigerant connecting tube (43) and the refrigerant connecting tube I (42) is turned on through the first channel (461), and the third refrigerant The take-up (49), the fourth refrigerant take-up (47), and the refrigerant take-up II (48) are conducted through the second passage (462).
The sleeve type heat pump according to claim 1 or 2, wherein the number N of the heat exchange sleeves (5) is an even number greater than 2, including the first pass heat exchange sleeve (51), the intermediate-pass heat exchange sleeve (53) and the final-pass heat transfer sleeve (52), and the tube paths (55) of the heat transfer sleeves (5) are sequentially connected in series through the tube-passing tee (56), the first pass The water inlet (512) at the lower end of the tube path (55) of the heat exchange sleeve (51) communicates with the water source tube (71) through the one-way check valve (72), and the water inlet (512) also passes through the one-way check. The water valve (72) is in communication with the lower end port (64) of the water storage tank (6); the low end water port (522) of the tube path (55) of the final heat exchange sleeve (52) and the water storage tank (6) The high-speed water inlet nozzle (63) is connected; the third port I (561) of the high-end pipe-way tee pipe (56) communicates with the upper end port (61) of the water storage tank (6) through the electromagnetic water valve (73), respectively. The third interface II (562) of the low-end tube-passing tee (56) is respectively connected to the lower end interface (64) of the water storage tank (6) through a one-way check valve (72); The shell side (54) of the tube (5) is sequentially connected in series through the shell-side connecting tube (57), and the lower end of the shell side (54) of the first-pass heat exchange sleeve (51) is provided with the first work. The interface (511) has a second working medium interface (521) at the lower end of the shell side (54) of the final heat exchange sleeve (52), and a third working medium interface (57) at the high end shell-side connecting tube (57) 571), the low-end shell-side connecting pipe (57) is provided with a fourth working medium interface (572), a first working medium interface (511), a second working medium interface (521), and a third working medium interface (571). And the fourth working fluid interface (572) is respectively connected to the heat pump reversing valve.
A casing type heat pump according to claim 9, wherein said heat pump reversing valve comprises a main valve (4) and a pilot valve (8) connected to the main valve (4) through a capillary; The main valve (4) comprises a valve body (44) and a valve core (46) wrapped in the valve body (44), the valve body (44) defines a valve cavity, and the valve body (44) has a relative valve cavity setting The first side wall and the second side wall, the two ends of the valve core (46) and the inner wall of the valve body (44) respectively define a first piston chamber (45) and a second piston chamber (410), the pilot valve (8) being respectively connected to the first piston chamber (45) and the second piston chamber (410) through a capillary tube, and the pilot valve (8) can control the valve core (46) to move left and right in the valve body (44); The first side wall of the body (44) is respectively provided with a first refrigerant connecting pipe (41) and a refrigerant connecting pipe I (42) corresponding to the number of the third working medium interface (571), and a second side wall of the valve body (44) There are respectively a third refrigerant connecting pipe (49), a fourth refrigerant connecting pipe (47) and a refrigerant connecting pipe II (48) corresponding to the number of the fourth working medium interfaces (572), the first refrigerant connecting pipe (41) and the compression The high pressure exhaust pipe of the machine (1) is connected, the third refrigerant pipe (49) and the second working fluid The port (521) is connected, and the third working medium interface (571) is in one-to-one communication with the refrigerant connecting pipe I (42), and the first working medium interface (511) is connected to the fourth refrigerant connecting pipe (47), and the first working medium is connected. The interface (511) is further connected to the expansion valve (3); the fourth working medium interface (572) is respectively connected to the refrigerant connection tube II (48) one-to-one; the valve core (46) is respectively opened in the axial direction a channel (461) and a second channel (462), the valve core (46) is radially open at a position of one of the ends of the third channel (463) extending through the outer surface of the valve core (46), when the valve core ( 46) When moving to the first piston chamber (45) end, the first refrigerant connection (41) and the third refrigerant connection (49) are conducted through the third passage (463), and the refrigerant connection I (42) is not guided to each other. The fourth refrigerant connecting pipe (47) and the refrigerant connecting pipe II (48) are not electrically connected to each other; when the spool (46) is moved to the second piston chamber (410) end, the first refrigerant connecting pipe (41) and the refrigerant connecting pipe I (42) is turned on by the first channel (461), and the third refrigerant connection (49), the refrigerant connection tube (48), and the fourth refrigerant connection tube (47) are turned on through the second passage (462).
The casing type heat pump according to claim 1, wherein the high speed water inlet nozzle (63) has a funnel V shape, and the high speed water inlet nozzle (63) and the inner wall of the water storage tank (6) are sandwiched. The angle α, α is 20 to 45°.